Cardiac Rehabilitation Sessions Research Articles

The iATTEND Trial: A Trial Comparing Hybrid Versus Standard Cardiac Rehabilitation

The improving ATTENDance (iATTEND) to cardiac rehabilitation (CR) trial tested the hypotheses that hybrid cardiac rehabilitation (HYCR = combination of virtual and in-facility CR sessions) would result in greater attendance compared to traditional, facility-based only CR (FBCR) and yield equivalent improvements in exercise capacity and health status. Patients were randomized to HYCR (n=142) or FBCR (n=140), stratified by sex and race. Attendance was assessed as number of CR sessions completed within 6 mo (primary end-point) and % patients completing 36 CR sessions. Other end-points (tested for equivalency) included exercise capacity and self-reported health status. HYCR patients completed 1 to 12 sessions in-facility, with the balance completed virtually using synchronized, two-way audiovisual technology. Neither total number of CR sessions completed within 6 mo (29±12 vs 28±12 visits, adjusted P= 0.94) nor % of patients completing 36 sessions (59±4% vs 51±4%, adjusted P=0.32) were significantly different between HYCR and FBCR, respectively. The between group changes for exercise capacity (peak oxygen uptake, 6-minute walk distance) and health status were equivalent. Regarding safety, no sessions required physician involvement, there was 1 major adverse event after a virtual session, and no falls requiring medical attention. In conclusion, although we rejected our primary hypothesis that attendance would be greater with HYCR versus FBCR, we showed that FBCR and HYCR resulted in similar patient attendance patterns and equivalent improvements in exercise capacity and health status. HYCR that incorporates virtually supervised exercise should be considered an acceptable alternative to FBCR.NCT identifier: 03646760; The Improving ATTENDance to Cardiac Rehabilitation Trial - Full Text View - ClinicalTrials.gov; https://classic.clinicaltrials.gov/ct2/show/NCT03646760

Interhospital variability in cardiac rehabilitation use after cardiac surgery among Medicare beneficiaries

ObjectiveDespite guideline recommendation, cardiac rehabilitation (CR) after cardiac surgery remains underused, and the extent of interhospital variability is not well understood. This study evaluated determinants of interhospital variability in CR use and outcomes. MethodsThis retrospective cohort study included 166,809 Medicare beneficiaries undergoing cardiac surgery who were discharged alive between July 1, 2016, and December 31, 2018. CR participation was identified in outpatient facility claims within a year of discharge. Hospital-level CR rates were tabulated, and multilevel models evaluated the extent to which patient, organizational, and regional factors accounted for interhospital variability. Adjusted 1-year mortality and readmission rates were also calculated for each hospital quartile of CR use. ResultsOverall, 90,171 (54.1%) participated in at least 1 CR session within a year of discharge. Interhospital CR rates ranged from 0.0% to 96.8%. Hospital factors that predicted CR use included nonteaching status and lower-hospital volume. Before adjustment for patient, organizational, and regional factors, 19.3% of interhospital variability was attributable to the admitting hospital. After accounting for covariates, 12.3% of variation was attributable to the admitting hospital. Patient (0.5%), structural (2.8%), and regional (3.7%) factors accounted for the remaining explained variation. Hospitals in the lowest quartile of CR use had greater adjusted 1-year mortality rates (Q1 = 6.7%, Q4 = 5.2%, P < .001) and readmission rates (Q1 = 37.6%, Q4 = 33.9%, P < .001). ConclusionsIdentifying best practices among high CR use facilities and barriers to access in low CR use hospitals may reduce interhospital variability in CR use and advance national improvement efforts.

Nurse-Led Cardiac Rehabilitation Care Coordination Program: Improving Functional Outcomes for Patients Through Automatic Referral and Effective Care Coordination.

The aim of this investigation was to evaluate the impact of automated cardiac rehabilitation (CR) referral and nurse care coordination on patient and program outcomes. Specifically, the aim was to identify whether differences exist in physical and psychological function at CR Phase 2 enrollment and completion and CR Phase 2 participation and completion for hospitalized patients who receive in-person CR nurse visits versus phone consultation. Using a retrospective pre-/post-intervention descriptive design, a purposive sampling technique was used to select groups with matching clinical attributes. Dates were selected to mitigate the impact of COVID-19 on CR program enrollment and completion. Data were abstracted from the patient electronic medical record, telemetry documentation, and CR referral tracking tool. Patient descriptors included age, sex, cardiac diagnosis/procedure (post-coronary artery bypass graft surgery, myocardial infarction, percutaneous coronary intervention, heart failure, and aortic valve repair and replacement) and cardiac risk stratification category. Patient functional outcomes included the 6-min walk test and metabolic equivalents of task levels for functional capacity; psychological function was measured by the Patient Health Questionnaire assessment. Program outcomes included discharge to CR Phase 2 enrollment, CR sessions, and completion. Each group had 52 patients. Age was 64 ± 12yr, 68% were male. Perhaps indications for CR included coronary artery bypass graft surgery (44%), myocardial infarction (19%), percutaneous coronary intervention (20%), heart failure (10%), aortic valve repair and replacement (8%). Cardiac risk was low in 30%, intermediate in 65%, and high in 5%. The post-intervention group compared with the pre-intervention group had a shorter discharge to CR Phase 2 enrollment (35 ± 18 d vs 41 ± 28 d, P = .078) and significantly fewer sessions required for CR completion. Automated CR referral and nurse care coordination visits for hospitalized patients decreased the transition period between CR Phase 1 and 2. Patients were physically and psychologically prepared for earlier CR Phase 2 enrollment and successfully completed the program in fewer days than the pre-intervention group.

Abstract P165: Home- and Center-Based Cardiac Rehabilitation Utilization Among Adults With Heart Failure in Kaiser Permanente Southern California

Background: Cardiac rehabilitation (CR) is guideline-recommended for patients with chronic, stable heart failure (HF). Despite benefits in reducing the risk of outcomes and improved quality of life, referrals to and participation in CR are low. This study describes sociodemographic variability in referrals and participation in center-based CR (CBCR) and home-based CR (HBCR) among adults with HF in Kaiser Permanente Southern California. Methods: Adults ≥ 18 years of age with a history of HF, who were eligible for CR referral between April 2018 and April 2019 were identified. HF was defined using diagnosis codes and required to occur ≤ 30 days prior to their first CR session. Participation was defined as completing ≥ 1 session. Sociodemographics and comorbidities were described across four mutually exclusive groups: (1) no referral, (2) referral and non-participation, (3) participation in CBCR and (4) participation in HBCR. Results: Among 7,801 adults with HF eligible for CR, the mean age was 74 years, with the majority male (58%), non-Hispanic white (50%), and English-speaking (90%), and having high burden of comorbidities including atrial fibrillation (50%), chronic kidney disease (49%), and hypertension (82%). (Table) Only 326 (4%) adults received a referral for CR, with 128 (39%) not participating, 97 (30%) participating in CBCR, and 101 (31%) participating in HBCR. Those not receiving a CR referral had the highest proportion of older individuals and comorbidities. Those referred to CR but who did not participate were most likely to be male (70%) and single (16%). Household income was highest among those participating in CBCR and HBCR ($83,000 and $80,000, respectively, compared with overall median $77,000) but this was not statistically significant. Conclusion: Less than 5% of eligible HF patients were referred to CR and variability by age, income, marital status, and comorbidities were noted for referrals and participation. Reducing disparities in CR utilization may improve outcomes in this high-risk group.

Anxiety Predicts Worse Cardiorespiratory Fitness Outcomes in Cardiac Rehabilitation for Lower Socioeconomic Status Patients.

The purpose of this study was to show that patients in cardiac rehabilitation (CR) with lower socioeconomic status (SES) have worse clinical profiles and higher rates of psychiatric difficulties and they have lower cardiorespiratory fitness (CRF) improvements from CR than their counterparts with higher SES. Improvement in CRF during CR predicts better long-term health outcomes. Research suggests that higher anxiety impairs CRF in structured exercise regimes and is overrepresented among patients with lower SES. However, no study has determined whether this relationship holds true in CR. This study is a secondary analysis of a randomized controlled trial to improve CR attendance among patients with lower SES. Anxiety (ASEBA ASR; Achenbach System of Empirically Based Assessment, Adult Self Report) and CRF measures (metabolic equivalent tasks [METs peak ]) were collected prior to CR enrollment and 4 mo later. Regression was used to examine the association of anxiety with CRF at 4 mo while controlling for other demographic and clinical characteristics. Eight-eight participants were included in the analyses, 31% of whom had clinically significant levels of anxiety ( T ≥ 63). Higher anxiety significantly predicted lower exit CRF when controlling for baseline CRF, age, sex, qualifying diagnosis, and number of CR sessions attended ( β =-.05, P = .04). Patients with clinically significant levels of anxiety could be expected to lose >0.65 METs peak in improvement. The results from this study suggest that anxiety, which is overrepresented in populations with lower SES, is associated with less CRF improvement across the duration of CR. The effect size was clinically meaningful and calls for future research on addressing psychological factor in CR.

Cardiac Rehabilitation Use After Heart Failure Hospitalization Associated With Advanced Heart Failure Center Status.

Cardiac rehabilitation (CR) is an evidence-based, guideline-endorsed therapy for patients with heart failure with reduced ejection fraction (HFrEF) but is broadly underutilized. Identifying structural factors contributing to increased CR use may inform quality improvement efforts. The objective here was to associate hospitalization at a center providing advanced heart failure (HF) therapies and subsequent CR participation among patients with HFrEF. A retrospective analysis was performed on a 20% sample of Medicare beneficiaries primarily hospitalized with an HFrEF diagnosis between January 2008 and December 2018. Outpatient claims were used to identify CR use (no/yes), days to first session, number of attended sessions, and completion of 36 sessions. The association between advanced HF status (hospitals performing heart transplantation or ventricular assist device implantations) and CR participation was evaluated with logistic regression, accounting for patient, hospital, and regional factors. Among 143 392 Medicare beneficiaries, 29 487 (20.6%) were admitted to advanced HF centers (HFCs) and 5317 (3.7%) attended a single CR session within 1 yr of discharge. In multivariable analysis, advanced HFC status was associated with significantly greater relative odds of participating in CR (OR = 2.20: 95% CI, 2.08-2.33; P < .001) and earlier initiation of CR participation (-8.5 d; 95% CI, -12.6 to 4.4; P < .001). Advanced HFC status had little to no association with the intensity of CR participation (number of visits or 36 visit completion). Medicare beneficiaries hospitalized for HF were more likely to attend CR after discharge if admitted to an advanced HFC than a nonadvanced HFC.

ARE CHANGE IN METS DURING CARDIAC REHAB RELATED TO CHANGE IN PEAK VO2 AND 6MWD?

BACKGROUND Change in metabolic equivalents of task (METs) during exercise training is often used as a program outcome in cardiac rehabilitation (CR). The purpose of this study is to assess the correlation between the change in estimated exercise training METs during a CR program and the change in six-minute walk distance (6MWD) and change in peak oxygen uptake (VO2). METHODS This is a secondary analysis of data from the iATTEND trial- a randomized controlled trial that compared facility based CR versus hybrid CR. Subjects included in this analysis had a history of myocardial infraction, coronary revascularization, heart failure, or valve surgery and completed ≥12 sessions of CR. METs during exercise training were estimated using ACSM treadmill equations from the average of the second, third and fourth sessions of CR and the final three sessions of CR. 6MWD and peak VO2 was derived from a symptom limited graded exercise treadmill test with gas exchange were collected at baseline before starting CR and within 14 days of completing CR. Pearson correlation coefficient was determined between change in estimated exercise training METs and both change in 6MWD and in peak VO2. RESULTS The final cohort was n=237 (age=59±12 years; 35% women; 57% non-white race). The correlation between change in estimated exercise training METs and 6MWD was r=0.257, r=0.245, and r=0.235 among patients who completed ≥12 sessions of CR, ≥24 sessions of CR, and 36 sessions of CR, respectively. The correlation between change in estimated exercise training METs and peak VO2 was r=0.121, r=0.100, and r=0.136 among patients who completed ≥12 sessions of CR, ≥24 sessions of CR, and 36 sessions of CR, respectively. CONCLUSIONS Although change in estimated exercise training METs during a CR program, change in 6MWD, and change in peak VO2 have each been used to describe change in exercise tolerance for program outcomes, the association between these variables is low (r= &amp;lt;0.3). This finding was independent regardless of the number of sessions completed. Further research is needed to better understand the relationship between the various methods of assessing change in exercise tolerance and program outcomes in CR.

Improving adherence to rehabilitation for heart failure patients through immersive virtual reality (VIRTUAL-HF): A protocol for a randomized controlled trial

BackgroundTo improve symptoms and reduce poor outcomes related to heart failure (HF), international guidelines recommend cardiac rehabilitation (CR), particularly for those with a reduced ejection fraction. Unfortunately, patient adherence to rehabilitation programs remains suboptimal, with dropouts ranging from 15.4 to 63.3%. An innovative and promising intervention that could improve adherence to rehabilitation is virtual reality (VR). This study aims to evaluate the effects of VR in patients with HF who undergo CR using this technology in terms of adherence (primary outcome), functional capacity, perceived exertion, angina, quality of life, heart rate, oxygen saturation, blood pressure, maximum oxygen uptake, minute ventilation/carbon dioxide production slope, oxygen pulse, blood values of NT-proBNP and HF related rehospitalization rates (secondary outcomes). MethodsA randomized controlled trial will be conducted in a sample of 80 patients referred to CR. Participants will be enrolled in a cardiological rehabilitation unit of a large university hospital in Italy and randomized (1:1) to the experimental intervention consisting of CR performed with high-quality immersive VR with PICO 4® Head Mounted Display headset and TREADMILL XR® software (Arm 1) or standard CR (Arm 2). Patients, according to guidelines, will perform 30-min of CR sessions with moderate intensity, twice a week for one month. ResultsSignificant improvements in primary and secondary outcomes are expected in patients in the intervention group. ConclusionsIf proven to be effective, VR could be an innovative, safe, and easy digital health intervention to improve adherence to CR in patients with HF, as well as important clinical outcomes.

A Detailed Analysis of Cardiac Rehabilitation on 180-Day All-Cause Hospital Readmission and Mortality.

Cardiac rehabilitation (CR) is endorsed for coronary artery disease (CAD), but studies report inconsistent findings regarding efficacy. The objective of this study was to determine whether confounding factors, potentially contributing to these heterogeneous findings, impact the effect of CR on all-cause readmission and mortality. Patients (n = 2641) with CAD, CR eligible, and physically able were identified. Electronic medical records were inspected individually for each patient to extract demographic, clinical characteristic, readmission, and mortality information. Patients (n = 214) attended ≥1 CR session (CR group). Survival was considered free from: all-cause readmission; or composite outcome of all-cause readmission or death. Cox proportional hazards models, adjusting for demographics, comorbidities, and discharge criteria, were used to determine HR with 95% CI and to compare 180-d survival rates between the CR and no-CR groups. During 180 d of follow-up, 12.1% and 18.7% of the CR and non-CR patients were readmitted to the hospital. There was one death (0.5%) in the CR group, while 98 deaths (4.0%) occurred in the non-CR group. After adjustment for age, sex, race, depression, anxiety, dyslipidemia, hypertension, obesity, smoking, type 2 diabetes, and discharge criteria, the final model revealed a significant 42.7% reduction in readmission or mortality risk for patients who attended CR (HR = 0.57: 95% CI, 0.33-0.98; P = .043). Regardless of demographic characteristics, comorbidities, and cardiovascular discharge criteria, the risk of 180-d all-cause readmission or death was markedly decreased in patients who attended CR compared with those who did not.

Cost Analysis of Remote Cardiac Rehabilitation Compared With Facility-Based Cardiac Rehabilitation for Coronary Artery Disease

Remote cardiac rehabilitation (RCR) represents a promising, noninferior alternative to facility-based cardiac rehabilitation (FBCR). The comparable cost of RCR in US populations has yet to be extensively studied. The purpose of this prospective, patient-selected study of traditional FBCR versus a third-party asynchronous RCR platform was to assess whether RCR can be administered at a comparable cost and clinical efficacy to FBCR. Adult insured patients were eligible for enrollment after an admission for a coronary heart disease event. Patients selected either FBCR or Movn RCR, a 12-week telehealth intervention using an app-based platform and internet-capable medical devices. Clinical demographics, intervention adherence, cost-effectiveness, and hospitalizations at 1-year after enrollment were assessed from the Highmark claims database after propensity matching between groups. A total of 260 patients were included and 171 of those eligible (65.8%) received at least 1 cardiac rehabilitation session and half of the patients chose Movn RCR. The propensity matching produced a sample of 41 matched pairs. Movn RCR led to a faster enrollment and higher completion rates (80% vs 50%). The total medical costs were similar between Movn RCR and FBCR, although tended toward cost savings with Movn RCR ($10,574/patient). The cost of cardiac rehabilitation was lower in those enrolled in Movn RCR ($1,377/patient, p=0.002). The all-cause and cardiovascular-related hospitalizations or emergency department visits in the year after enrollment in both groups were similar. In conclusion, this pragmatic study of patients after a coronary heart disease event led to equivalent total medical costs and lower intervention costs for an asynchronous RCR platform than traditional FBCR while maintaining similar clinically important outcomes.

Abstract 15107: Dramatic Impact of a Liaison-Mediated Referral Strategy on Cardiac Rehabilitation Participation After Percutaneous Coronary Intervention: Insights From the Blue Cross Blue Shield of Michigan Cardiovascular Consortium

Background: While cardiac rehabilitation (CR) improves outcomes after percutaneous coronary intervention (PCI) it remains underutilized. A liaison-mediated referral, where a healthcare professional explains CR’s benefits and places a referral before discharge, may promote CR use. Hypothesis: We hypothesize a liaison-mediated CR referral is associated with greater CR participation after PCI. Methods: This was a retrospective cohort study of patients who underwent PCI across 48 hospitals in Michigan between January 2021 and April 2022 and were referred to CR before discharge. Clinical registry data was linked to Medicare and commercial claims to identify the primary outcome of CR participation, defined as attending ≥1 CR session within 90 days of discharge from the index PCI admission. Bayesian hierarchical logistic regression modeling was used to compare CR participation between patients with and without a liaison referral, adjusting for patient characteristics. Cox-proportional hazard modeling was used to compare days elapsed between discharge and first CR session between liaison cohorts. Results: Among 9,023 patients referred to CR after PCI, 4,323 (47.9%) underwent a liaison referral and 3,390 (37.6%) attended ≥1 CR session within 90 days of discharge. The liaison and non-liaison cohorts had a mean age of 69.3 vs 69.4 years, and 68.3% vs 68.4% were male, respectively. The liaison cohort had a higher unadjusted 90-day CR participation rate compared with the non-liaison cohort (Figure). After adjustment, the liaison cohort had a significantly higher odds of attending ≥1 CR session and a shorter delay in attending the first session compared with the non-liaison cohort (28 vs 33 days, p&lt;0.001) (Figure). Conclusion: A liaison-mediated CR referral is associated with higher odds of post-PCI CR participation and may mitigate delays in CR enrollment. This may be an effective referral strategy to improve CR participation rates and patient outcomes after PCI.

Abstract 14656: Virtual Cardiac Rehabilitation is Rarely Used but May Augment Overall Attendance

Introduction: The COVID-19 public health emergency temporarily expanded Medicare reimbursement of cardiac rehabilitation (CR) to cover virtual CR. The purpose of this study was to evaluate the frequency of virtual CR use in Medicare and describe this emerging population of virtual CR patients, as there is currently limited data on the rates and patterns of virtual CR utilization. Methods: The study sample included 100% of Medicare beneficiaries undergoing surgical/percutaneous coronary revascularization or aortic valve replacement between July 2019 and December 2021 in the Medicare Virtual Research Data Center. Professional claims were used to identify CR use within one year of discharge using CPT codes (93797, 93798), and the disaster-related modifiers (“CR” or “DR”) were used to categorize CR visits as synchronized virtual sessions. Descriptive analysis compared patient characteristics and number of CR sessions attended between patients using virtual and facility-based CR. Results: Overall CR use was 32.5% in the entire sample (167066/513735). Any CR use was more prevalent among patients who were male, White, or 65-85 years old, and similar between coronary revascularization vs. aortic valve procedures. Only 14 states reported any virtual CR visits (CA, FL, GA, IL, IN, MI, MN, MO, NY, OR, PA, TN, TX, WI). Within these states, only 1% (886) of all CR users had at least one virtual CR session. The characteristics of patients who utilized virtual CR were largely similar to those who attended facility-based only CR. The median number of virtual sessions was 21 (IQR 26). Of patients who utilized virtual CR, 17.7% (157) also attended at least one facility-based CR session. Notably, combined virtual and facility-based CR utilizers attended a median of 33 (IQR 14) total CR sessions, compared to 25 (IQR 23) CR sessions for patients who attended only facility-based CR. Conclusion: Virtual CR was not widely available or used despite expanded Medicare reimbursement, yet our data suggests that the combined use of virtual and facility-based CR may be associated with a greater number of sessions attended (vs. facility-based only CR). Further research is needed to inform long-term policy decisions, particularly as it pertains to continued Medicare coverage of virtual CR.

Abstract 13300: Recovery From Acute Cardiac Events in Lower-Socioeconomic Status Patients: Physical and Psychological Outcomes Over Time

Introduction: Participation in cardiac rehabilitation (CR) reduces morbidity, and mortality, while improving quality of life following major cardiovascular events. Patients with lower-socioeconomic status (SES), such as those enrolled in Medicaid, are much less likely to attend and complete CR, despite being at increased risk for recurrent cardiovascular events. Methods: A secondary analysis was performed on a randomized controlled trial in which 130 individuals enrolled in Medicaid, with a CR-qualifying cardiac event, were randomized 1:1 to receive financial incentives for completing CR sessions or to usual care. Participants were assessed on clinical and cognitive outcomes soon after discharge as well as at 4 months, and 1 year following entry. The current analyses focused on how outcomes changed over the three timepoints. Outcomes included changes in psychological measurements (depressive/anxious symptoms, quality of life), body composition (waist circumference, body mass index), and fitness (peak VO2/METS). Mixed model repeated measures analyses of variance were used to test for main effects while controlling for sex, smoking status, age, and qualifying diagnosis. Results: Lower-SES patients entering CR had remarkably low levels of fitness and high rates of psychological issues. Fitness improved between intake and 4-months, and gains were maintained through one year (p&lt;0.001) (Table 1) however gains were less in females and those who completed fewer sessions of CR. Body composition measurements significantly worsened between 4-months and 1-year (p&lt;0.03). Psychological measures did not improve in the year following the event. Conclusion: While fitness improved in lower-SES patients, especially among those who completed more sessions of CR, psychological symptoms were elevated and did not improve. Future research should seek to understand how we can better serve this population, especially in the area of psych symptoms.

Abstract 15793: Impact of Cardiac Rehabilitation on Cardiovascular Disease Risk Factor Management at 1 and 3 Year Follow-Up

Introduction: Cardiac rehabilitation (CR) is a cornerstone of secondary prevention for cardiovascular disease (CVD). CR participation is associated with improvements in secondary CVD risk factor management. However, it is unclear if CR participation is associated with maintained improvements in CVD risk factor management following CR completion. Purpose: The aim of this study was to assess the impact of CR participation on CVD risk factor management at 1 and 3 years following CR completion. Methods: This retrospective study analyzed 911 patients (73% male) enrolled in the CR program at Mayo Clinic from 2013 to 2020. Patient demographics, clinical characteristics, and CVD risk factor management were examined pre and post CR as part of clinical practice and assessed passively at 1 and 3 years following CR. Secondary prevention CVD risk factor goals included total cholesterol (&lt;200 mg/dL), HDL cholesterol (&gt;40 mg/dL), LDL cholesterol (&lt;100 mg/dL), triglycerides (&lt;150 mg/dL), systolic and diastolic blood pressure (&lt;130 and &lt;80 mmHg), and body mass index (BMI) (18.5-24.9 kg/m 2 ). Results: The mean age was 66±12 years and on average 33±9 CR sessions were attended. Table 1 shows the percentage (%) of patients meeting the secondary prevention CVD risk factor goals. The % of patients meeting the goals for total cholesterol, LDL, triglycerides, and diastolic blood pressure were higher post than pre CR. There were no changes in the % of patients meeting the goals for total cholesterol or LDL at 1 and 3 year follow up compared to post CR. At 1 and 3 year follow up, there was a lower % of patients meeting the goals for systolic and diastolic blood pressure and triglycerides (at 1 year follow up only) than post CR. No changes were present in the % of patients meeting the goals for HDL and BMI at any timepoint (all, p&gt;0.09). Conclusions: CR participation was associated with maintained improvements in lipid management, but not in triglycerides or blood pressure control at 1 and 3 years following CR.

Abstract 15475: Comparable Program Delivery Time: Home-Based versus Hospital-Based Cardiac Rehabilitation

Introduction: Home-based cardiac rehabilitation (CR) adds flexibility for patients for whom hospital-based CR may not be accessible. The ERA-NUDGE study is a pragmatic randomized study, conducted at an urban safety-net hospital, which evaluated adherence and clinical outcomes of home- versus hospital-based CR, with mobile phone messaging. The resource requirements associated with home-based CR interactions are not yet well established. We aimed to compare program delivery time between home-based and hospital-based CR programming. Methods: For one random week in each of 22 months, program delivery times were recorded by a research team member who shadowed hospital CR sessions and reviewed chart notes for home-based CR interactions. Among the sub-set of participants who had interactions during these weeks, we compared time spent on four types of interactions and seven educational topics. Results: Among 326 patients that completed the parent study, 157 patients had 415 visits during the microcosting weeks (mean of 3.8 visits per patient). Demographics shown in Table 1. Home-based patients accounted for 134 encounters (32%) during microcosting collection weeks. Six- and twelve-week follow-up visits were split between hospital- and home-based groups (53% and 47%, respectively) (Table 2). Conclusions: Despite documented benefits for patients from CR, access remains low. Home-based CR may present an appealing alternative for patients with difficulties around CR access, but CR program directors may be wary of added staffing requirements to deliver these alternatives. Our analysis suggests that home-based CR can be delivered to patients without increases in personnel time.

Abstract 13317: Current Smoking Impedes Recovery in Cardiac Rehabilitation

Purpose: Current smoking is a powerful predictor of future morbidity and mortality and those who smoke are more likely to have higher risk clinical profiles and less likely to engage in secondary prevention. Little is known about how those who smoke benefit from secondary prevention following a cardiac event, such as cardiac rehabilitation (CR). The purpose of this study was to compare improvements in fitness among those who smoke vs those who do not during CR. Methods: Data were gathered on 2208 individuals entering the University of Vermont CR program from 1/1996-12/2021. Self-reported smoking status was collected at CR entry (current vs. formerly vs. never smoking). Cardiorespiratory fitness (CRF)(peak oxygen capacity [VO2peak]) was assessed via exercise tolerance test at entry to and exit from CR. Change in Peak VO2 was compared by smoking status univariately and in a multivariate model controlling for other potential contributing variables like age, sex, entry VO2, number and severity of exercise-limiting comorbidities, BMI, and number of CR sessions attended. Results: On average patients improved by 3.26 in their CRF during the course of CR. In univariate analyses improvement by smoking status was 2.29, 3.06, and 3.55 (current, former, never smoker respectively). The final multivariate model included smoking status, CRF at intake, comorbidities, age, BMI, and interactions between smoking status and age, and BMI and age. Least square means from this model were improvements of 1.95, 3.10, and 3.53 (current, former, never smoker respectively). Conclusion: These data suggest that those who are currently smoking improve less in fitness during CR than those who formerly or never smoked and that controlling for covariates highlights that the biggest difference in the effect of smoking is truly between the current smokers and the former/never smokers. Further research should be conducted to see if successful smoking cessation can improve fitness related gains during CR.

Abstract 16761: Preprocedural Frailty is Associated With Lower Cardiac Rehabilitation Use Despite Greater Benefit

Introduction: Increased frailty before cardiovascular procedures is associated with poorer outcomes. While underutilized, cardiac rehabilitation (CR) is guideline-recommended for patients undergoing cardiovascular procedures and may help mitigate frailty through individualized, monitored exercise and risk factor reduction. Research Question/Hypothesis: Evaluate the relationship between preprocedural frailty, CR use, and one-year mortality. Methods: Medicare fee-for-service claims data were queried for patients who underwent inpatient percutaneous or surgical revascularization or aortic valve replacement between July 2016 and December 2018. Patients were stratified into quartiles (Q1 through Q4) using the validated claims-based frailty index. CR use was defined as attending any CR session within one year of discharge. Unadjusted and adjusted logistic regression was used to compare CR use across increasing frailty quartiles, and inverse probability treatment weighting was used to evaluate the effect of CR on one-year mortality across frailty quartiles. Results: Overall CR enrollment among the 570,851 beneficiaries was 35.3%; increasing frailty was associated with decreased CR use (unadjusted: frailty Q1: 48.3% vs Q4: 20.6%, p&lt;0.001; adjusted OR: 0.61, p&lt;0.001). Unadjusted one-year mortality was lower among CR users as opposed to non-users (2.7% vs 14.6%). After weighted adjustment, the absolute reduction in mortality associated with CR use was greater among frailer patients (Q4: -12.2%) relative to less frail patients (Q1: -2.9%) (Figure). Significant interaction effects between CR use and frailty quartiles indicated stronger associations of CR on mortality among more frail patients. Conclusions: Preprocedural frailty was associated with lower CR use despite greater absolute benefits on one-year mortality. Increasing CR enrollment in frail patients may enhance outcomes after cardiac interventions.

Factors that predict compliance in a virtual cardiac rehabilitation program

BackgroundDespite the well-established benefits of cardiac rehabilitation (CR) for patients with cardiovascular disease (CVD), participation in CR remain low. Virtual CR programs present a unique opportunity to promote utilization. To date, few virtual CR cohorts have been analyzed for compliance. This study aims to determine factors that predict compliance within a large virtual CR program in the United States. MethodsWe analyzed 1409 patients enrolled in the Kaiser Permanente Mid-Atlantic States Virtual CR program that consists of 12 CR sessions via telephone. Demographic characteristics, as well as body weight, blood pressure, HbA1c level, and smoking status were collected at admission. Patients were further classified by CVD diagnosis codes. Compliance was defined as at least 75% (9/12 sessions) attendance. Data was analyzed using simple and multiple regression models with significance defined as P < 0.05. ResultsAge was the single strongest predictor for virtual CR compliance (adjusted R2 = 0.58; P < 0.001), and non-compliant patients were younger. HbA1C level, CVD diagnosis codes, and smoking status each moderately predicted compliance (adjusted R2 = 0.48, 0.42, and 0.31, respectively; P < 0.001). Smoking and HbA1C level combined in a multiple regression model significantly improved prediction of compliance (adjusted R2 = 0.79, P < 0.01). Sex, baseline weight or hypertension were not significant predictors of CR compliance. ConclusionsAge, diabetes, CVD diagnoses, smoking status at admission are independent predictors of compliance in a large virtual CR program. Targeted intervention could be designed accordingly to improve CR compliance.

Effect of Cardiac Rehabilitation on Post Exercise Systolic Blood Pressure Recovery in Patients with Impaired Left Ventricular Ejection Fraction after Recent Myocardial Infarction

Abstract Background Ischemic Heart diseases (IHD) are significant causes of morbidity and mortality worldwide with an estimated 9 million deaths each year. Exercise-based Cardiac Rehabilitation (CR) is one of the most important and cost-effective aspects of secondary prevention in patients with IHD. Post-exercise Systolic Blood Pressure Recovery (SBPR) represents an important hemodynamic parameter that is associated with the risk and severity of ischemic artery disease and future cardiovascular events. Aim of the Work The aim of this study is to assess the effect of CR on post-exercise SBPR in patients with Left Ventricular Ejection fraction less than 45% following a recent Myocardial Infarction. Patients and Methods this study included patients with Left Ventricular Ejection fraction less than 45% following a recent Myocardial Infarction, presenting to Cardiac Rehabilitation Units. the study included two groups of patients. Study group included Patients on optimal medical treatment who are attending CR sessions, and control group included patients on optimal medical treatment who refused or failed to attend more than 50% of cardiac rehabilitation sessions. SBPR was assessed in each patient before and after the CR program. Results When compared to baseline findings, both groups had statistically significant improvement in LVEF, resting SBP, recovery SBP value and HRR. However, CR group had better improvement in LVEF, lower Resting SBP, lower Peak SBP, Better SBP recovery ratio and better HRR outcomes when compared to the changes in the control group. Conclusions Cardiac Rehabilitation after recent Ischemic coronary artery event can provide significant improvement in Systolic blood pressure recovery and heart rate recovery which are important haemodynamic parameters that are associated with the significance and severity of future cardiovascular events. Abbreviations IHD: Ischemic Heart Disease; CR: Cardiac Rehabilitation; LVEF: Left Ventricular Ejection fraction; SBP: Systolic Blood Pressure

Feasibility of Integrating MEditatioN inTO heaRt Disease (the MENTOR Study): A Phase II Randomized Controlled Trial.

Comorbid depression and/or anxiety symptoms occur in 25% of patients attending cardiac rehabilitation (CR) programs and are associated with poorer prognosis. There is a need to evaluate psychological interventions, including meditation, that have potential to improve psychological health in CR programs. The aim of this study was to determine the feasibility and acceptability of integrating a meditation intervention into an existing Australian CR program for the reduction of depression and anxiety symptoms. This was a mixed-methods feasibility randomized controlled trial. Thirty-one patients with CVD and, at a minimum, mild depression and/or anxiety symptoms were randomized to meditation and standard CR or to standard CR alone. A 16-minute guided group meditation was delivered face-to-face once a week for 6 weeks, with daily self-guided meditation practice between sessions. Feasibility outcomes included screening, recruitment, and retention. Semistructured interviews of patients' (n = 10) and health professionals' (n = 18) perspectives of intervention participation and delivery were undertaken to assess acceptability. Between-group differences in depression, anxiety, stress, self-efficacy for mindfulness, and health status at 6 and 12 weeks were also assessed. Meditation was considered feasible, with 83% (12/15) of the intervention group completing an average of 3.13 (SD, 2.56) out of 6 group meditation sessions and 5.28 (SD, 8.50) self-guided sessions. Meditation was considered acceptable by patients, clinicians, and health managers. Between-group differences in the number of CR sessions completed favored the intervention group in per-protocol analyses (intervention group vs control group, 12 vs 9 sessions; P = .014), which suggests that meditation may be useful to improve patients' adherence to exercise-based CR program.