Systolic Blood Pressure Ratio Research Articles

Prognostic Value of Ventilatory Power In Heart Failure with Preserved Ejection Fraction

Objectives Cardiopulmonary exercise testing (CPET) is a well known prognostic tool in chronic heart failure (CHF). Ventilatory power (VP) defined as the product of peak exercise systolic blood pressure (SBP) divided by the VE/VCO2 slope was originally introduced in 2012 by Forman et al and evaluated as a prognostic index in systolic CHF. The aim of this study was to confirm prognostic significance of VP in HF with preserved ejection fraction (HFpEF). Methods We retrospectively analyzed the subgroup of 47 patients with HFpEF, NYHA classes II-III (33 male, mean age 64,2±11,7 years) previously enrolled in the prospective observational study. All patients were on optimal medical treatment. At baseline the patients underwent comprehensive investigation including CPET. VP was assessed as a ratio of peak exercise SBP divided by minute ventilation/CO2 production (VE/VCO2) slope. Average follow-up period amounted 37 months. Cardiovascular mortality was considered the primary end-point. Results Cardiovascular mortality amounted 34% (n=16). ROC-analysis demonstrated significant independent predictive value of VF for cardiovascular death (AUC=0,756; 95%CI= 0,609 to 0,869; p=0,0029). According to Youden index (J = sensitivity + specificity - 1) the patients were subsequently dichotomized by VF of 3,7 as a cut-off point which closely corresponds with the cut-off value of 3,5 proposed in Forman et al study. Cox regression analysis confirmed unfavorable prognosis in patients with VF ≤ 3,7 (HR = 4,6; 95%CI = 1,7-12,5, p = 0,003). Conclusion Ventilatory power (VP) combining peak exercise systolic blood pressure (SBP) and VE/VCO2 slope demonstrates significant prognostic value in HFpEF. VP values ≤ 3,7 reflecting lower SBP and higher VE/VCO2 slope indicate unfavorable prognosis in terms of cardiovascular mortality and may be used as an independent non-invasive marker for risk stratification in HFpEF patients.

Instantaneous Cardiac Baroreflex Sensitivity: xBRS Method Quantifies Heart Rate Blood Pressure Variability Ratio at Rest and During Slow Breathing.

Spontaneous baroreflex sensitivity (BRS) is a widely used tool for the quantification of the cardiovascular regulation. Numerous groups use the xBRS method, which calculates the cross-correlation between the systolic beat-to-beat blood pressure and the R-R interval (resampled at 1 Hz) in a 10 s sliding window, with 0–5 s delays for the interval. The delay with the highest correlation is selected and, if significant, the quotient of the standard deviations of the R-R intervals and the systolic blood pressures is recorded as the corresponding xBRS value. In this paper we test the hypothesis that the xBRS method quantifies the causal interactions of spontaneous BRS from non-invasive measurements at rest. We use the term spontaneous BRS in the sense of the sensitivity curve is calculated from non-interventional, i.e., spontaneous, baroreceptor activity. This study includes retrospective analysis of 1828 measurements containing ECG as well as continues blood pressure under resting conditions. Our results show a high correlation between the heart rate – systolic blood pressure variability (HRV/BPV) quotient and the xBRS (r = 0.94, p < 0.001). For a deeper understanding we conducted two surrogate analyses by substituting the systolic blood pressure by its reversed time series. These showed that the xBRS method was not able to quantify causal relationships between the two signals. It was not possible to distinguish between random and baroreflex controlled sequences. It appears xBRS rather determines the HRV/BPV quotient. We conclude that the xBRS method has a potentially large bias in characterizing the capacity of the arterial baroreflex under resting conditions. During slow breathing, estimates for xBRS are significantly increased, which clearly shows that measurements at rest only involve limited baroreflex activity, but does neither challenge, nor show the full range of the arterial baroreflex regulatory capacity. We show that xBRS is exclusively dominated by the heart rate to systolic blood pressure ratio (r = 0.965, p < 0.001). Further investigations should focus on additional autonomous testing procedures such as slow breathing or orthostatic testing to provide a basis for a non-invasive evaluation of baroreflex sensitivity.

Chronotherapy with a Renin-angiotensin System Inhibitor Ameliorates Renal Damage by Suppressing Intrarenal Renin-angiotensin System Activation.

Objective The intrarenal renin-angiotensin system (RAS) is activated in chronic kidney disease (CKD) patients and is not suppressed at night in CKD patients showing nocturnal hypertension, contributing to renal damage. Furthermore, changes in RAS inhibitor administration from morning to evening, namely chronotherapy, ameliorates renal damage at night. We attempted to clarify whether or not chronotherapy ameliorates renal damage by suppressing the intrarenal RAS activity. Methods We recruited 34 CKD patients with RAS inhibitors in the morning. We conducted ambulatory blood pressure (BP) monitoring and urine collection and evaluated urinary albumin (Alb) and angiotensinogen (AGT), which are surrogate markers for intrarenal RAS activity during the day and at night, respectively. The same experiments were conducted after changing the administration time. The ratio of values associated with morning versus evening dosing was defined as the morning to evening (M/E) ratio. Results The M/E ratio of urinary Alb had a significant and positive relationship with that of urinary AGT during the day and at night in all CKD patients. However, no significant relationships were found between the M/E ratios of urinary Alb and AGT using multiple linear regression analyses. Conversely, there was a significant and positive relationship between the M/E ratios of urinary Alb and AGT at night but not during the day in CKD patients whose estimated glomerular filtration rate was <45 mL/min/1.73 m2 and whose night-to-day ratio of systolic BP was >0.90, even after adjustment. Conclusion This study indicated that chronotherapy with RAS inhibitors improved the renal damage via intrarenal RAS suppression, especially in CKD patients with an impaired renal function and nocturnal hypertension.

A role for tubular Na+/H+ exchanger NHE3 in the natriuretic effect of the SGLT2 inhibitor empagliflozin.

Inhibitors of proximal tubular Na+-glucose cotransporter 2 (SGLT2) are natriuretic, and they lower blood pressure. There are reports that the activities of SGLT2 and Na+-H+ exchanger 3 (NHE3) are coordinated. If so, then part of the natriuretic response to an SGLT2 inhibitor is mediated by suppressing NHE3. To examine this further, we compared the effects of an SGLT2 inhibitor, empagliflozin, on urine composition and systolic blood pressure (SBP) in nondiabetic mice with tubule-specific NHE3 knockdown (NHE3-ko) and wild-type (WT) littermates. A single dose of empagliflozin, titrated to cause minimal glucosuria, increased urinary excretion of Na+ and bicarbonate and raised urine pH in WT mice but not in NHE3-ko mice. Chronic empagliflozin treatment tended to lower SBP despite higher renal renin mRNA expression and lowered the ratio of SBP to renin mRNA, indicating volume loss. This effect of empagliflozin depended on tubular NHE3. In diabetic Akita mice, chronic empagliflozin enhanced phosphorylation of NHE3 (S552/S605), changes previously linked to lesser NHE3-mediated reabsorption. Chronic empagliflozin also increased expression of genes involved with renal gluconeogenesis, bicarbonate regeneration, and ammonium formation. While this could reflect compensatory responses to acidification of proximal tubular cells resulting from reduced NHE3 activity, these effects were at least in part independent of tubular NHE3 and potentially indicated metabolic adaptations to urinary glucose loss. Moreover, empagliflozin increased luminal α-ketoglutarate, which may serve to stimulate compensatory distal NaCl reabsorption, while cogenerated and excreted ammonium balances urine losses of this "potential bicarbonate." The data implicate NHE3 as a determinant of the natriuretic effect of empagliflozin.

Response to exercise-induced blood pressure elevation is blunted in wrist-cuff automated oscillometric measurement in healthy young college students.

BackgroundA wrist‐cuff automated oscillometric device is portable and useful for self‐monitoring of blood pressure (BP) at home and outdoors when an upper arm device is not available. Although the height of the forearm in wrist BP measurement is acknowledged to be the major cause of measurement error, it remains unclear whether exercise affects subsequent wrist BP measurement.Methods and ResultsNinety‐seven healthy college students (median age of 20 years with an age range of 19 to 36 years, 70.1% males) participated in this study. Care was taken to keep the position of the wrist at a level near the upper arm level in BP measurement. At rest, BP measured by a wrist‐cuff oscillometric device (Omron HEM‐6183) was generally acceptable when it was compared with BP measured by an upper arm oscillometric device (Omron HEM‐7130‐HP) and with BP measured by the auscultatory method using a mercury sphygmomanometer. However, the ratio of systolic BP measured by oscillometric devices just after a two‐step exercise test to that before exercise on the wrist (1.22 ± 0.14) was significantly lower than the ratio on the upper arm (1.27 ± 0.14), and the difference was significantly correlated with exercise‐induced increase in pulse rate (Spearman's ρ = 0.23), suggesting a possible role of autonomic nerve activity in the blunted response to exercise‐induced BP elevation in wrist BP measurement.ConclusionsThe results indicate that the blunted response to exercise‐induced BP elevation should be considered in wrist BP measurement when using a wrist‐cuff oscillometric device.

Effects of chronic beta-blocker treatment on admission haemodynamics in STEMI patients treated with primary angioplasty.

The association between chronic beta-blocker treatment and haemodynamics at admission in patients with ST-segment elevation myocardial infarction treated by primary percutaneous coronary intervention is not well studied. We investigated the impact of chronic beta-blocker treatment on the risk of cardiogenic shock and pre-shock at admission in patients with ST-segment elevation myocardial infarction treated by primary percutaneous coronary intervention. A total of 4907 patients with ST-segment elevation myocardial infarction treated with primary percutaneous coronary intervention were included in the study. A total of 1148 patients (23.3%) were on chronic beta-blocker treatment. Cardiogenic shock was observed in 264 patients (5.3%). Pre-shock was defined as a shock index (the ratio of heart rate and systolic blood pressure) of 0.7 or greater, and was observed in 1022 patients (20.8%). The risk of cardiogenic shock in patients with chronic beta-blocker treatment was not increased (adjusted hazard ratio (HR) 0.97, 95% confidence interval (CI) 0.65-1.46, P=0.90). Chronic beta-blocker treatment was also not associated with an increased risk of pre-shock (adjusted HR 0.86, 95% CI 0.68-1.07, P=0.19). Also after propensity score matched analysis, there was no increased risk of cardiogenic shock or pre-shock in patients with chronic beta-blocker treatment (respectively HR 0.97, 95% CI 0.61-1.51, P=0.88 and HR 0.82, 95% CI 0.65-1.06, P=0.12). In ST-segment elevation myocardial infarction, chronic beta-blocker treatment is not associated with an increased risk of cardiogenic shock or pre-shock.

Does underweight amplify the relationship between short-term particulate matter exposure and blood pressure in children and adolescents: a large cross-sectional study in a metropolis of China.

Overweight/obesity modified the effects of ambient particulate matter (PM) exposure on blood pressure (BP). This study aims to assess whether interaction of underweight and short-term PM exposure on BP exists in Chinese children. A cross-sectional analysis including 144,513 children aged 6 to 17years in 2016 Health Promotion Program for Children and Adolescents of Suzhou, China, was performed. Daily concentrations of inhalable PM (PM10) and fine PM (PM2.5) were extracted from air monitoring stations close to students' schools. We applied generalized linear mixed-effects models to estimate the interactions. Estimated changes (95% confidence intervals (CIs)) of systolic BP (SBP), diastolic BP (DBP), and odds ratios (ORs) (95% CIs) for prevalence of HBP were calculated. Significant interactions between PM and underweight on BP and prevalence of high BP (HBP) were observed. For example, at lag 6, the ORs (95% CIs) for HBP by each 10μg/m3 changes of PM2.5 were 1.066 (1.039, 1.093) and 1.036 (1.028, 1.043) among underweight and normal weight subjects, respectively; these values for PM10 were 1.048 (1.031, 1.065) and 1.025 (1.021, 1.030). At lag 5, the increases of SBP for PM2.5 were 0.32 (95% CI 0.22, 0.43) mmHg and 0.23 (95% CI 0.29, 0.26) mmHg, while changes of DBP were 0.27 (95% CI 0.18, 0.35) mmHg and 0.19 (95% CI 0.16, 0.21) mmHg among underweight and normal weight subjects, respectively. Stratified analyses demonstrated that these interactions were only obtained in males. Effects of short-term PM exposure on BP and prevalence of HBP are enhanced in underweight children and adolescents.

Feasibility and value of two-dimensional volumetric stress echocardiography

Stroke volume response during stress is a major determinant of functional status in heart failure and can be measured by two-dimensional (2-D) volumetric stress echocardiography (SE). The present study hypothesis is that SE may identify mechanisms underlying the change in stroke volume by measuring preload reserve through end-diastolic volume (EDV) and left ventricular contractile reserve (LVCR) with systolic blood pressure and end-systolic volume (ESV). We enrolled 4735 patients (age 63.6±11.3 years, 2800 male) referred to SE for known or suspected coronary artery disease (CAD) and/or heart failure (HF) in 21 SE laboratories in 8 countries. In addition to regional wall motion abnormalities (RWMA), force was measured at rest and peak stress as the ratio of systolic blood pressure by cuff sphygmomanometer/ESV by 2D with Simpson's or linear method. Abnormal values of LVCR (peak/rest) based on force were ≤1.10 for dipyridamole (N.=1992 patients) and adenosine (N.=18); ≤2.0 for exercise (N.=2087) or dobutamine (N.=638). Force-based LVCR was obtained in all 4735 patients. Lack of stroke volume increase during stress was due to either abnormal LVCR and/or blunted preload reserve, and 57% of patients with abnormal LVCR nevertheless showed increase in stroke volume. Volumetric SE is highly feasible with all stresses, and more frequently impaired in presence of ischemic RWMA, absence of viability and reduced coronary flow velocity reserve. It identifies an altered stroke volume response due to reduced preload and/or contractile reserve.

A head-to-head comparison of wall motion score index, force, strain, and ejection fraction for the prediction of SYNTAX and Gensini coronary scores by dobutamine stress echocardiography.

Predicting the severity of coronary artery disease (CAD) may be possible during dobutamine stress echocardiography (DSE) with various indices of left ventricular function. We assessed the relative value of ejection fraction (EF), force, global longitudinal strain (GLS), and wall motion score index (WMSI) in predicting SYNTAX and Gensini scores in patients with known or suspected CAD. We prospectively enrolled 223 patients (120 men; mean [SD] age, 62 [9] years) and assessed the following indices: 1) EF (with triplane imaging); 2) force, calculated as the ratio of systolic blood pressure to left ventricular end‑systolic volume; 3) GLS; 4) WMSI. All patients underwent coronary angiography within 12 weeks with SYNTAX and Gensini scores evaluation. The correlation of SYNTAX and Gensini scores was highest with peak WMSI (SYNTAX, rho = 0.591; Gensini, rho = 0.612; P<0.001), intermediate with peak force (SYNTAX, rho = -0.346; Gensini, rho = -0.377; P<0.001) and GLS (SYNTAX, rho = -0.205; P = 0.002 and Gensini rho = -0.216; P = 0.001), and the weakest for EF (SYNTAX, rho = -0.149; P = 0.03 and Gensini, rho = -0.191; P = 0.006). The similar hierarchy of variables was detected for changes during DSE. In the subgroup after myocardial infarction (n = 66 [27%]), GLS outperformed the force. In patients with CAD at DSE peak, theWMSI and force were better predictors of the coronary SYNTAX and Gensini scores and CAD severity than GLS or EF. However, in patients after myocardial infarction, the GLS correlation with coronary scores improved and got closer to the visual assessment.

Lipoprotein(a)and renal function decline, cardiovascular disease and mortality in type 2 diabetes and microalbuminuria

AimsLipoprotein(a)(Lp(a)) has emerged as an independent risk marker for cardiovascular disease (CVD) in the general population and among persons with existing CVD. We investigated associations between serum Lp(a)concentrations and renal function decline, incident CVD and all-cause mortality in individuals with type 2 diabetes (T2D) and microalbuminuria. MethodsProspective study including 198 individuals with T2D, microalbuminuria and no CVD. Yearly p-creatinine was measured after baseline in 176 of the participants. The renal endpoint was defined as decline in eGFR of >30% from baseline. CVD events and mortality were tracked from national registries. Cox regression analyses were applied both unadjusted and adjusted for traditional risk factors (sex, age, systolic blood pressure, LDL-cholesterol, smoking, HbA1c, creatinine and urinary albumin creatinine ratio (UAER)). ResultsBaseline mean (SD) age was 59 (9)years, eGFR 89 (17) mL/min/1.73 m2, 77% were male, and median [IQR] UAER was 103 [38–242] mg/24-h. Median Lp(a)was 8.04 [3.42–32.3] mg/dL. Median follow-up was 6.1 years; 38 CVD events, 26 deaths and 43 renal events were recorded. For each doubling of baseline Lp(a), the following hazard ratios (95% confidence intervals) were found before and after adjustment respectively: 0.98 (0.84–1.15) and 1.01 (0.87–1.18) for decline in eGFR > 30%, 0.96 (0.81–1.13) and 0.99 (0.82–1.18) for CVD events, 1.04 (0.85–1.27) and 1.06 (0.87–1.30) for all-cause mortality. ConclusionsIn this cohort of individuals with T2D and microalbuminuria, the baseline concentration of Lp(a)was not a risk marker for renal function decline, CVD events or all-cause mortality.

Supporting patients with long-term conditions in the community: Evaluation of the Greater Manchester Community Pharmacy Care Plan Service.

The Greater Manchester Community Pharmacy Care Plan (GMCPCP) service provided tailored care plans to help adults with one or more qualifying long-term condition (hypertension, asthma, diabetes and COPD) to achieve health goals and better self-management of their long-term conditions. The service ran between February and December 2017. The aim of this study was to investigate the impact of the service on patient activation, as measured by the PAM measure (primary outcome). Secondary outcomes included quality of life (EQ-5D-5L, EQ-VAS), medication adherence (MARS-5), NHS resource use and costs, systolic and diastolic blood pressure, HDL cholesterol ratio levels and body mass index (BMI). A before and after design was used, with follow-up at 6-months. A questionnaire was distributed at follow-up and telephone interviews with willing participants were used to investigate patient satisfaction with the service. The study was approved by the University of Manchester Research Ethics Committee. Quantitative data were analysed in SPSS v22 (IBM). A total of 382 patients were recruited to the service; 280 (73%) remained at follow-up. Ten patients were interviewed and 43 completed the questionnaire. A total of 613 goals were set; mean of 1.7 goals per patient. Fifty percent of goals were met at follow-up. There were significant improvements in PAM, EQ-5D-5L and EQ-VAS scores and significant reductions in systolic blood pressure, BMI and HDL cholesterol ratio at follow-up. Mean NHS service use costs were significantly lower at follow-up; with a mean decrease per patient of £236.43 (±SD £968.47). The mean cost per patient for providing the service was £203.10, resulting in potential cost-savings of £33.33 per patient (SD±874.65). Questionnaire respondents reported high levels of satisfaction with the service. This study suggests that the service is acceptable to patients and may lead to improvements in health outcomes and allows for modest cost savings. Limitations of the study included the low response rate to the patient questionnaire.

Comprehensive Echocardiographic Assessment of Ventricular Function and Pulmonary Pressure in the Neonatal Omphalocele Population.

Pulmonary hypertension (PH) has been described in the neonatal omphalocele population. This study was aimed to describe cardiac function and PH severity using echocardiography in newborns with giant omphalocele (GO) and with non-GO and determine if right ventricular (RV) dysfunction is associated with mortality. Retrospective, single-center analysis of first echocardiography among neonatal omphalocele patients born between 2004 and 2017 was conducted. Multivariate logistic and univariate Cox's regression was constructed to measure hazard ratio (HR) for death outcome. There were 32 newborns, of whom 18 were GO and 7 died. GO had increased systolic pulmonary arterial to systolic systemic blood pressure ratio (97% [isosystemic] vs. 73% [three-fourths systemic] p = 0.03). RV performance parameters (tricuspid annular plane excursion, HR = 0.40; fractional area change, HR = 0.90; and RV peak global longitudinal strain, HR = 1.39) were associated with mortality. These RV performance parameters remained associated in a multiple logistic regression accounting for gestational age and GO status. The overall population had abnormal eccentricity index and pulmonary artery acceleration time to RV ejection time ratio, two markers of PH. Patients with omphalocele have increased pulmonary pressure, with GO being worse than non-GO. RV dysfunction at initial echocardiography was significantly associated with mortality.

SUN-250 INDIVIDUALISED COOL DIALYSIS ALTERS THE ET-1/NO RATIO AND IMPROVES INTRADIALYTIC HYPERTENSION

While hemodialysis lowers blood pressure in most hypertensive end-stage renal disease (ESRD) patients, some patients exhibit a paradoxical increase in blood pressure during hemodialysis. This adversely increases morbidity and mortality of hemodialysis patients. Aims: To study the effect of individualised cool dialysis [iCoolHD] on intradialytic hypertension [IDH]. To find if this is mediated by temperature mediated change in Endothelin-1[ET-1] and Nitric Oxide [NO] ratio. Objectives: To evaluate the incidence of intradialytic hypertension in patients on maintenance hemodialysis at 37°C[sHD] and iCoolHD. To evaluate the correlation between ET-1/NO ratio during sHD vs iCoolHD. Methods: All 48 dialysis patients had IDH. Each were dialysed at sHD and iCoolHD (i.e., dialysate temperature was adjusted to their basal body temperature as measured by Tympanic thermometer). For iCoolHD, the temperature of the dialysis was adjusted to the patients prevailing body temperature. The mean between group variation of 0.1-0.6°C was maintained throughout dialysis (fig1). The mean systolic blood pressure was 170.1±7 mmHg in sHD vs 166.8±6.6 mmHg in iCoolHD (fig2). Thirty four (71%) of the patients had mean systolic blood pressure higher during sHD (37C) in comparison to patients when dialyzed by iCoolHD. The difference was statistically significant in 18(37.5%) of patients. Only 2(4.1%) patients had higher mean systolic blood pressure at iCoolHD than sHD (fig3). The SN ratio of systolic blood pressure in sHD (variation in SN ratio of 11mmHg) and iCoolHD (variation in SN ratio of 4 mmHg) demonstrated better blood pressure stability during iCoolHD (fig4). During iCoolHD, all the patients had the ET-1/NO ratio < 1.0, whereas 36(75% ) of patients had ratio >0.92 (fig5). For the first time we show that individualised cool dialysis has a definite role in reducing the incidence of intra-dialytic hypertension. iCoolHD improved IDH in 38% of our cohort. ET1/NO ratio is affected by temperature modulation during dialysis. ET1/NO ratio is significantly reduced only at iCoolHD.

Reverse shock index multiplied by Glasgow Coma Scale (rSIG) predicts mortality in severe trauma patients with head injury

The reverse shock index (rSI), a ratio of systolic blood pressure (SBP) to heart rate (HR), is used to identify prognosis in trauma patients. Multiplying rSI by Glasgow Coma Scale (rSIG) can possibly predict better in-hospital mortality in patients with trauma. However, rSIG has never been used to evaluate the mortality risk in adult severe trauma patients (Injury Severity Score [ISS] ≥ 16) with head injury (head Abbreviated Injury Scale [AIS] ≥ 2) in the emergency department (ED). This retrospective case control study recruited adult severe trauma patients (ISS ≥ 16) with head injury (head AIS ≥ 2) who presented to the ED of two major trauma centers between January 01, 2014 and May 31, 2017. Demographic data, vital signs, ISS scores, injury mechanisms, laboratory data, managements, and outcomes were included for the analysis. Logistic regression and receiver operating characteristic analysis were used to evaluate the accuracy of rSIG score in predicting in-hospital mortality. In total, 438 patients (mean age: 56.48 years; 68.5% were males) were included in this study. In-hospital mortality occurred in 24.7% patients. The median (interquartile range) ISS score was 20 (17–26). Patients with rSIG ≤ 14 had seven-fold increased risks of mortality than those without rSIG ≤ 14 (odds ratio: 7.64; 95% confidence interval: 4.69–12.42). Hosmer–Lemeshow goodness-of-fit test and area under the curve values for rSIG score were 0.29 and 0.76, respectively. The sensitivity, specificity, positive predictive value, and negative predictive values of rSIG ≤ 14 were 0.71, 0.75, 0.49, and 0.89, respectively. The rSIG score is a prompt and simple tool to predict in-hospital mortality among adult severe trauma patients with head injury.

Effectiveness of a stepwise cardiometabolic disease prevention program: Results of a randomized controlled trial in primary care

Effective preventive strategies for cardiometabolic disease (CMD) are needed. We aim to establish the effectiveness of a stepwise CMD risk assessment followed by individualized treatment if indicated compared to care as usual. We conducted a RCT between 2014 and 2017. Individuals (45–70 years) without CMD or CMD risk factors were invited for stepwise CMD risk assessment through a risk score (step1), additional risk assessment at the practice in case of high-risk (step2) and individualized follow-up treatment if indicated (step3). We compared newly detected CMD and newly prescribed drugs during one-year follow-up, and change in CMD risk profile between baseline and one-year follow-up among participants who completed step2 to matched controls. A CMD was diagnosed almost three times more often (OR 2.90, 95% CI 2.25: 3.72) in the intervention compared to the control group, in parallel with newly prescribed antihypertensive and lipid lowering drugs (OR 2.85, 95% CI 1.96: 4.15 and 3.23, 95% CI 2.03: 5.14 respectively). Waist circumference significantly decreased between the intervention compared to the control group (mean −3.08 cm, 95% CI −3.73: −2.43). No differences were observed for changes in BMI and smoking. Systolic blood pressure (mean −2.26 mmHg, 95% CI −4.01: −0.51) and cholesterol ratio (mean −0.11, 95% CI −0.19: −0.02) significantly decreased within intervention participants between baseline and one-year follow-up. In conclusion, implementation of the CMD prevention program resulted in the detection of two- to threefold more patients with CMD. A significant drop in systolic blood pressure and cholesterol levels was found after one year of treatment. Modelling of these results should confirm the effect on long term endpoints.Trial registration: Dutch trial Register number NTR4277.

P329 Outcome prediction with force-based left ventricular contractile reserve during stress echocardiography

Abstract OnBehalf Stress Echo 2020 study group of the Italian Society of Cardiovascular Imaging Background Stress echo (SE) risk stratification is based on regional wall motion abnormalities (RWMA). The assessment of global left ventricular contractile reserve (LVCR) based on load-independent Force may refine prognosis. Aim To assess the value of LVCR during SE in predicting outcome Methods From September 2016 to December 2018, we prospectively enrolled 1848 patients (age 63 ± 11 years; 1121 males, 60%) with known or suspected coronary artery disease and/or heart failure evaluated with SE (exercise in 543, dipyridamole in 1184, adenosine in 10, dobutamine in 43) in 9 quality-controlled centers of 6 countries. Force was measured at rest and peak stress as the ratio of systolic blood pressure by cuff sphygmomanometer/end-systolic volume by 2D and biplane Simpson method of disks. When Simpson method was not feasible, apical single plane or linear parasternal methods were used to calculate volumes. Abnormal values of LVCR (peak/ rest) based on force were ≤1.10 for dipyridamole and adenosine; ≤1.61 for exercise or dobutamine. All patients were followed-up for a median of 16 months. Results RWMA and Force-based LVCR were obtained in all pts. Force was 4.24 ± 1.88 mmHg/ml at rest and increased during stress (7.07 ± 4.60 mmHg/ml, p&amp;lt;.001). At individual patient analysis, LVCR was abnormal in 495 (26%) and normal in 1373 (74%) patients. At follow-up, there were 218 events: 22 deaths, 22 non-fatal myocardial infarctions, 62 hospital admissions for acute heart failures, and 112 late (&amp;gt; 3 months from SE) myocardial revascularizations. At multivariable analysis, stress-induced RWMA (Hazard Ratio, HR, 2.899, 95% Confidence Intervals, CI: 2.032-4.137, p&amp;lt;.0.001), force-based LVCR (HR 1.747, 95% CI: 1.245-2.470, p=.002) were independent predictors. Kaplan-Meier curves showed worse event-free survival for pts with abnormal LVCR: see figure. Conclusion LVCR based on Force is a useful adjunct to RWMA for risk stratification with SE. Abstract P329 Figure. Survival curves and LVCR

Evaluation of central: peripheral blood pressure ratio in patients undergoing coronary angiography: A pilot study from North India

Aim: The study aimed to propose the ratio of central blood pressure:peripheral blood pressure as a novel index to predict cardiovascular risk. We additionally attempted to determine the impact of beta-blocker therapy on this ratio. Materials and Methods: This was a prospective, single-centre study conducted between August 2019__ and December 2019. A total of 102 patients undergoing cath-lab procedures such as coronary angiography (CAG), percutaneous coronary intervention were studied. Central blood pressure was invasively measured from the radial artery. Peripheral blood pressure was also measured from the right arm radial artery using invasive pressure transducer. Patients were divided into two groups as follows: (i) beta-blocker group to receive beta-blocker treatment (n = 82) and (ii) nonbeta-blocker group that did not receive beta-blocker treatment (n = 20). Results: The mean age of the study participants was 55.7 ± 10.0 years. Males constituted 80 (78.4%) patients of the study population. The central:peripheral blood pressure ratios for systolic and diastolic blood pressure were 0.88 ± 0.1 and 0.93 ± 0.2 (P = 0.004), respectively. Systolic blood pressure ratios for the beta-blocker and nonbeta-blocker groups were 0.89 ± 0.1 and 0.93 ± 0.2 (P = 0.016), respectively. Similarly, diastolic blood pressure ratios for the beta-blocker and nonbeta-blocker groups were 0.84 ± 0.1 and 0.95 ± 0.1 (P = 0.770), respectively. Conclusions: This novel ratio of central:peripheral blood pressure may serve as a precursor of cardiovascular risk. This ratio may give a clue to relationship between central and peripheral blood pressure.

Validity of 2-Day Cardiopulmonary Exercise Testing in Male Patients with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome

Introduction: Among the main characteristics of patients with myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) are effort intolerance along with a prolonged recovery from exercise and post-exertional exacerbation of ME/CFS symptoms. The gold standard for measuring the severity of physical activity intolerance is cardiopulmonary exercise testing (CPET). Multiple studies have shown that peak oxygen consumption is reduced in the majority of ME/CFS patients. A consecutive day CPET protocol has shown a difference on day 2 in ME/CFS patients in contrast to sedentary controls. Because of the low number of male ME/CFS patients in the published literature, and because of a possible gender difference in the clinical phenotype, the aim of this study was to examine whether the response to a 2-day CPET protocol in a larger sample of male ME/CFS patients was similar to that observed in females. Methods: From 77 male patients, 25 male ME/CFS patients fulfilled the criteria of a 2-day CPET protocol for analysis. Measures of oxygen consumption (VO2), heart rate (HR), systolic and diastolic blood pressure, workload (Work), and respiratory exchange ratio (RER) were made at maximal (peak) and ventilatory threshold (VT) intensities. Data were analysed using a paired t-test. Results: Baseline characteristics of the group were as follows. Mean age was 44 (12) years, mean BMI was 27.1 (4.4) kg/m2. Median disease duration was 10 years (IQR 7 - 13). Heart rate, systolic and diastolic blood pressure at rest and the RER did not differ significantly between CPET 1 and CPET 2. All other CPET parameters at the ventilatory threshold and maximum exercise differed significantly (p-value between 2 and workload at peak exercise and ventilatory threshold. Conclusion: This study confirms that male ME/CFS patients have a reduction in exercise capacity in response to a consecutive day CPET. These results are similar to published results in female ME/CFS populations.

Nocturnal systolic hypertension is a risk factor for cardiac damage in the untreated masked hypertensive patients.

The nocturnal blood pressure (BP) has been identified as a prognostic factor for cardiovascular events. This study aimed to investigate the association between different patterns of nocturnal masked hypertension (MH) and the echocardiographic parameters in the untreated nocturnal MH patients. A total of 721 untreated MH patients (309 females and 412 males, mean age=56.59±15.20years) from June 2006 and June 2016 were included and divided into nocturnal systolic MH (n=77), nocturnal diastolic MH (n=232), and nocturnal systolic/diastolic MH (n=412) groups according to the ambulatory blood pressure monitoring. Baseline characteristics, office BP values, ambulatory BP monitoring parameters, and echocardiographic parameters were compared among the three groups. The independent factors associated with echocardiographic parameters were analyzed by multivariate linear regression. The nocturnal systolic group had the highest ratio of males, mean age, and office systolic BP (SBP), and the lowest office, 24-hour, daytime, nocturnal diastolic BP and heart rate among the three groups. The nocturnal diastolic group had the lowest interventricular septum (IVS) thickness, left atrium (LA) dimension, and left ventricular (LV) mass among the three groups. Multivariate linear regression analysis revealed that 24-hour, daytime, and nocturnal SBPs were all positively associated with LA dimension, IVS thickness, and LV mass (all B were positive and P<.050). Pearson's correlation analysis showed that nocturnal SBP was positively correlated with LA dimension, IVS thickness, and LV mass. These results suggested that different patterns of nocturnal MH had different echocardiographic outcomes. Nocturnal SBP was the independent factor associated with the echocardiographic parameters.

Sharp systolic blood pressure elevation at extubation is a risk factor for symptomatic epidural hematoma after spine surgery.

The present study is a single-center retrospective cohort study. The objective of the study is to verify the hypothesis that sharp elevation of systolic blood pressure at extubation is a risk factor for development of symptomatic epidural hematoma after spinal surgery. Postoperative symptomatic epidural hematoma (she) after spine surgery is a rare but potentially serious complication that may result in paralysis unless removed at an early stage. The subjects were 2611 patients treated with decompression and decompression/fusion of the cervical, thoracic, and lumbar vertebrae at our hospital. Twelve of these patients developed postoperative SEH and removal of hematoma was performed. To investigate the risk factors in these patients, data were analyzed for age at the time of surgery, sex, preoperative complications, medical history, body mass index, preoperative platelet count, surgical procedure, microscope use, operative time, blood loss, surgical site, systolic blood pressure (SBP) at extubation, difference between resting and extubation SBP, ratio of SBP at extubation to that at rest, blood pressure at discharge from the operating room, and use of a drain. There was a significantly higher rate of SBP ratio (extubation/rest) ≥1.3 in patients with SEH (p = 0.021, Fisher's exact test). Among the preoperative complications and medical histories, the frequency of cerebrovascular disorder tended to be higher in SEH cases than in non-SEH cases (p = 0.073). There was no significant difference for all other parameters listed above. In multivariate logistic analysis, the odds ratios were 3.98 (p = 0.018) for an SBP ratio (extubation/rest) ≥1.3 and 4.75 (p = 0.055) for cerebrovascular disorder, suggesting effects of these two items. With simultaneous input into a multivariate model, SBP ratio ≥1.3 had a significant independent association with postoperative SEH (p = 0.021) and cerebrovascular disorder showed a tendency for this association (p = 0.072). The risk for symptomatic epidural hematoma is significant in patients with SBP at extubation that is more than 1.3 times that of SBP at rest.