Post-bypass Patients Research Articles

A randomized controlled trial of an eight-week cardiac rehabilitation home verse hospital exercise programme for post coronary cardiac bypass patients

Abstract Background The prevalence and morbidity and mortality rates of coronary heart disease (CHD) continue to increase towards epidemic proportions in the Kingdom of Saudi Arabia (KSA). Despite the advances in Cardiac surgery, currently there are no established out-patient phase program of Cardiac Rehabilitation (CR) for CHD participants in KSA. Aim of the study To evaluate the effectiveness of a home-based CR (Home CR) program using individualized exercise (Physiotools-R) and out-patient phase of CR (Hospital CR) program compared to standard care of home instructions on physical function, physiological and psychological status, body composition and the quality of life of the CHD participants post Coronary Artery Bypass Graft (CABG) surgery. Methods 73 participants post-CABG surgery were randomly assigned to one of three groups: Hospital CR group (n=25), Home CR group (n=24) and Control group (n=24). Outcome measures include Incremental Shuttle Walk Test (ISWT), Metabolic Equivalent Tasks (METs), Psychosocial outcomes and body composition were recorded at baseline, eight weeks of CR intervention, and after four weeks of observation follow up. Intervention: Hospital CR program comprised of group based Aerobic Circuit Training, home based structured individualized exercise program. Each programme had 2 hours’ sessions, 3 times a week for 8 weeks, followed by four weeks of observation follow-up. The control group followed standard care comprised usual advice on post-operation precautions. Results Post intervention, there was an increase in mean ISWT score from baseline in both the home-based cardiac rehabilitation and outpatient-based cardiac rehabilitation groups (66 [0.58] m and 71 [9.19] m, respectively). No difference was observed in the control group. At the 4-week follow-up, both intervention groups showed statistically significant improvements in all outcome measures (ISWT, metabolic equivalence tasks, HADS-A, HADS-D, and Short Form-36) compared with baseline (all P < .001). The home-based cardiac rehabilitation group showed statistically continuous improvement compared with the outpatient-based cardiac rehabilitation group. The control group did not show any significant changes across time in outcome measures Conclusion Home-based CR is as effective as hospital-based CR at improving exercise capacity in patients following CABG surgery. Home-based CR appears to be more effective at maintaining these improvements with no further input in the longer term.

Assessment of Gastric Remnant Activity, Symptoms, and Quality of Life Following Gastric Bypass.

While most gastric bypass patients recover well, some experience long-term complications, including nausea, abdominal pain, food intolerance, and dumping. This study aimed to evaluate symptoms and quality of life (QoL) in association with the residual activity of the remnant stomach. Patients undergoing gastric bypass and conversion-to-bypass were recruited. The Gastric Alimetry® System (Auckland, NZ) was employed, comprising a high-resolution electrode array, wearable reader, and validated symptom logging app. The protocol comprised 30-min fasting baseline, a 218-kCal meal stimulus, and 4-h of post-prandial recordings. Symptoms and QoL were evaluated using validated questionnaires. Remnant gastric electrophysiology evaluation included frequency, BMI-adjusted amplitude, and Gastric Alimetry Rhythm Index (GA-RI, reflecting pacemaker stability), with comparison to validated reference intervals and matched controls. Thirty-eight participants were recruited with mean time from bypass 46.8 ± 28.6months. One-third of patients showed moderate to severe post-prandial symptoms, with patients' median PAGI-SYM 28 ± 19 vs controls 9 ± 17 (p < 0.01); PAGI-QOL 37 ± 31 vs 135 ± 22 (p < 0.0001). Remnant gastric function was markedly degraded shown by undetectable frequencies in 84% (vs 0% in controls) and low GA-RI (0.18 ± 0.08 vs 0.51 ± 0.22 in controls; p < 0.0001; reference range > 0.25). Impaired GA-RI and amplitude were correlated with worse PAGI-SYM and PAGI-QOL scores. One-third of post-bypass patients suffered significant upper GI symptoms with reduced QoL. The bypassed remnant stomach shows highly deranged electrophysiology in-situ, reflecting disuse degeneration. These derangements correlated with QoL; however, causality is not implied by the present study.

Increased anti-thrombotic therapy is associated with decreased major adverse limb events in patients with low wound and foot infection scores.

The optimal anti-thrombotic management of patients after lower extremity bypass has yet to be fully elucidated, in part due to significant heterogeneity in patient presentation and practice patterns. The Wound, Ischemia, and foot Infection (WIfI) score is a validated scoring system to assist in the management of patients with chronic limb threatening ischemia (CLTI). We hypothesized that performing a restriction analysis based on WIFI scores would assist in the postoperative anti-thrombotic management of patients undergoing infrainguinal bypass. A retrospective cohort of infrainguinal bypass procedures completed at a single hospital system between January 2018 and January 2021 was selected, and preoperative WIfI scores were extracted for each patient. Patients with either Wound scores of 2 and 3, or Ischemia Scores of 0 and 1, or Foot Infection Scores of 3 were excluded. Based on the type of anti-thrombotic regimen on discharge, demographics, comorbidities, type of bypass, 30-day rates of graft occlusion, major amputation, mortality, and major adverse limb events (MALE) were analyzed. Statistical analysis included t-tests, chi square tests, and time-to-event survival analysis. 230 procedures were included in the study. 69 (30.0%) patients were discharged on single antiplatelet therapy (SAPT), compared to 161 (70.0%) who were discharged on either dual antiplatelet therapy or anticoagulation (DAPT/AC). There was a higher prevalence of bypasses using prosthetic conduit in the DAPT/AC group (45.9 vs 31.8%, p = .047); no other demographic or procedural variable analyzed had any significant differences. At 30-days postoperatively, there was no significant difference in postoperative reintervention rates, however, the DAPT/AC group had significantly lower rates of mortality (1.2 vs 7.2%, p = .01), major amputation (1.2% vs 5.8%, p = .04), and MALE (3.7 vs 13.0%, p < .01). There were no significant differences in bleeding complications. Survival analysis demonstrated that MALE-free survival was higher in the DAPT/AC group compared to the SAPT group (p < .01). On Cox regression analysis, DAPT/AC was associated with significantly decreased rates of MALE + mortality (Hazard Ratio (HR) 0.20 [0.06 - 0.66]). Lower extremity bypasses patients with low Wound and low foot Infection scores who are discharged on DAPT/AC postoperatively have a significantly higher 30-day MALE-free survival rate compared to patients discharged on SAPT; consideration could be made to preferentially discharge such post-bypass patients on DAPT/AC.

Primary percutaneous coronary intervention in new onset left bundle branch block in post bypass patient

Primary percutaneous coronary intervention in new onset left bundle branch block in post bypass patient

Effect of Perioperative Administration of Tranexamic Acid on Postoperative Bleeding Following on Pump CABG

Background: One of the main causes of post-operative morbidity in cardiac surgical patient is excessive bleeding requiring transfusion of blood component after CPB. Re-exploration due to bleeding occurs in 2% to 7% of post bypass patient and 50% to 80% of these patients not having any identifiable surgical bleeding source. Tranexamic acid is competitive inhibitor of plasminogen activator and at higher concentration a non-competitive inhibitor of plasmin. It is 10 times more potent than Epsilone Aminocaproic Acid in preventing post-operative haemorrhage following CPB.&#x0D; Methods: This study was conducted in the Department of Cardiac Surgery, National Institute of Cardiovascular Diseases (NICVD), Dhaka, Bangladesh between January 2009 and December 2010. The Study population was divided into two groups. Group A comprised of 35 patients, who had received Tranexamic Acid 10 mg /kg after induction and then 1 mg/kg/hour till time of protamin infusion and Group B comprised of 35 patients who had received same amount of normal saline 0.9% NaCl as placebo.&#x0D; Results: The postoperative bleeding during both 1 to 4 hours and 4 to 24 hours was significantly lower in the Tranexamic Acid group as compared to the placebo group (p value &lt;0.001). There was no significant difference between groups in terms of platelet count and prothrombin time.&#x0D; Conclusion: From the study, we conclude that “Perioperative Administration of Tranexamic acid reduces post operative bleeding and also reduces the need for postoperative blood transfusion in CABG patents using Cardiopulmonary bypass”. Therefore it is recommended that routine prophylactic use of Tranexamic Acid should be carried out to decrease the postoperative hemorrhage and requirement blood transfusion.&#x0D; Cardiovasc. j. 2019; 12(1): 20-23

OR11-5 Early Prevalence of Neuroendocrine Dysfunction after Spontaneous Aneurysmal Subarachnoid Haemorrhage: Interim Findings from a Prospective Cohort Study

The prevalence of neuroendocrine dysfunction after aneurysmal subarachnoid haemorrhage (SAH) is highly varied between 0-55%, with little known of time of onset and recovery. We aimed to examine prevalence, time of onset, progression and predictors of neuroendocrine dysfunction in patients with aneurysmal SAH. All patients admitted with spontaneous aneurysmal SAH, without known prior pituitary dysfunction or recent exposure to glucocorticoids, were prospectively recruited. Serum cortisol at 8AM was measured on days 1, 3, 5, 7 and 10 of admission while serum free T4, TSH, LH/FSH, estradiol/testosterone, and prolactin were evaluated on day 7 post intervention (surgical or endovascular) or day 10 of admission if there was no intervention. Complete pituitary function including IGF-1, were re-evaluated at 3 months. 32 patients (mean age: 56.4 ±13.3 years, 66% female) were recruited. 19 were categorized as World Federation of Neurological Societies (WFNS) low-grade (1-3) on arrival and 13 were high-grade (4-5). 25 and 5 subjects had endovascular and surgical interventions respectively, while 2 had none. 30-day mortality rate was 9.4% (3/32), with death occurring within a week in all 3 patients. Of the 29 who survived beyond a week, none developed early corticotroph deficiency. Mean cortisol levels were 876.9 (±406.9), 770.4 (±329.7), 674.1 (±278.7), 668.1 (±269.0) and 643.0 (±350.1) nmol/L on days 1,3,5,7, and 10 respectively. A homogenous control group of critically ill post coronary bypass patients were recruited to compare values of cortisol during the acute phase. There were no significant differences in mean serum cortisol between SAH patients and controls apart from day 1 levels, with controls having a higher mean cortisol level, 1109.1 ±410.1 nmol/L (p=0.03). 9.4% (3/29) and 41.4% (12/29) had early thyrotroph and gonadotroph deficiency respectively. Prolactin was normal in all patients. There was no significant association between WFNS grade and type of intervention on development of pituitary dysfunction. The mortality rate at 3 months was 18.8% (6/32), and there was no significant association between early cortisol levels, thyrotroph or gonadotroph deficiency and mortality status at this point. At 3 months, repeat testing revealed normal pituitary function (including IGF-1) in all patients except one with persistent gonadotroph deficiency. Pituitary dysfunction after aneurysmal SAH is uncommon. Early gonadotroph and thyrotroph deficiencies that occur are likely due to acute illness that recovers on follow up. However acute Day 1 basal cortisol post SAH while not deficient, is significantly lower than that in non-neurological critical illness.

Saphenous Vein Graft Sacrifice Following Native Vessel PCI is Safe and Associated with Favourable Longer-Term Outcomes.

Competitive flow from saphenous vein grafts (SVG) that remain patent following percutaneous coronary intervention (PCI) of the native vessel may compromise durability of the reconstructed vessel. SVG sacrifice has been advocated, but the safety and longer-term outcomes of this are unknown. We retrospectively reviewed all post-bypass patients who following successful PCI of the native vessel underwent attempted saphenous vein graft (SVG) closure between January 2014 and July 2018 in two institutions. The co-primary end-points of interest were safety and target lesion failure (TLF), defined as a composite of cardiac death, target vessel recurrent myocardial infarction or clinically driven target lesion revascularisation (TLR). Of the 33 consecutive patients included, the reconstructed native vessel was a chronic total occlusion (CTO) in 93.9% of patients (n = 31) with a mean J-CTO score of 3.2 (±1.1) SVG closure was successful in 97.0% of patients (n = 32). Amplatzer Vascular Plugs (AVP; Abbott Vascular) were used in all patients with most grafts closed by a single plug (72.7%). The average procedure time was 20.1 min with evidence of a short learning curve. Over a mean follow up of 602 (±393) days from the date of SVG closure, the incidence of TLF was 9.1% (n = 3). There was an additional case of targe vessel failure (TVF) due to progression of native vessel disease not treated at the index procedure. SVG closure resulted in only 1 episode of "slow flow" that was transient and self-resolving. There were no other associated peri-procedural or in-hospital complications. Following native vessel PCI, SVG sacrifice may be considered to terminate the potentially deleterious effects of residual competitive flow. In selected cases, this approach achieves high success rate and favourable longer-term outcomes.

Evaluation of Depression and Anxiety in Coronary Artery Bypass Surgery Patients: A Prospective Clinical Study.

ObjectiveThe aim of this clinical study is to determine the depression and anxiety levels in coronary artery bypass graft (CABG) surgery patients in the pre and postoperative periods.MethodsThis clinical prospective study was done with 65 patients. Beck’s Depression Inventory (BDI) and Beck’s Anxiety Inventory (BAI) tests were performed in patients who had a diagnosis of coronary artery disease and were awaiting CABG surgery. These patients presented characteristic symptoms of anxiety and depression and BDI and BAI tests are important to assess these symptoms.ResultsWe found out that depression and anxiety levels were higher in the postoperative than in the preoperative period (P<0.001). Both anxiety and depression levels were increased significantly following CABG operation when compared with preoperative levels in all patients. Statistical correlation of depression and anxiety in different ages, genders, and professions were evaluated too, but we did not found a correlation between them (P>0.05).ConclusionWe suggest that good management of the psychological condition of cardiac surgery candidates, as well as post-bypass patients, will improve quality of life and cardiovascular outcomes in these patients.

EUS-specific stents: Available designs and probable lacunae.

Interventional EUS has seen exponential growth in its indications and applications in the last decade.[1,2,3] Dedicated endoscopic devices for EUS-guided interventions are still limited. Up until recently, the tools used have been borrowed from other procedures such as ERCP. In interventional EUS, the linear-array echoendoscope allows a needle to be advanced under EUS-guidance from the upper gastrointestinal lumen to the biliary, pancreatic, or another adjacent intestinal lumen. Real-time puncture can be performed and provide the possibility of EUS-guided transluminal drainage (EUS-TLD). Plastic stents and conventional self-expandable metallic stents (SEMSs) were initially used but present several limitations due to their design.[1,4,5] They lack lumen-to-lumen anchorage and present migratory risks in the absence of stricture to hold them in place. Plastic stents are associated with potential pneumoperitoneum and bile peritonitis, whereas fully-covered SEMS (FCSEMS), despite preventing bile leak, will not maintain secure apposition between two nonadherent organs. Furthermore, their length often exceeds the anatomical requirement of a shorter transluminal anastomosis and predisposes them to obstruction as well as difficult positioning. With the rise in new EUS-guided interventional techniques, new tools, in particular, new stent designs have evolved to facilitate the various applications. A few EUS-specific stents have now become available for EUS-TLD.[4,5] We hereby review the stent designs and discuss lacunae to be addressed to improve the efficacy, safety, and ease of procedures.

Factors influencing the participation of post coronary artery bypass patients in cardiac rehabilitation exercise

Studies have shown that cardiovascular rehabilitation exercise improves quality of life in post-coronary-bypass-surgery patients. However, the rate of participation in this exercise by this patient group in Taiwan has increased only 8.2% during the past 13 years (from 61.9% in 1996 to 70.1% in 2009). Little is known about the factors that influence patient motivation to participate in cardiovascular rehabilitation exercise. This study explores the factors that influence patient participation in rehabilitation exercise following coronary bypass surgery. This cross-sectional, correlational study recruited a convenience sample of 253 patients who had undergone coronary bypass surgery at a medical center in southern Taiwan. Structured questionnaires, including a patient rehabilitation exercise experience questionnaire, Short Form-36 Health Survey-Taiwan Form, and cardiac rehabilitation exercise design factors questionnaire were used for data collection. SPSS19.0 was used to analyze data. The variables "healthcare provider recommendation of rehabilitation exercise", "exercise program accessibility", "physical health status", and "patient post-surgical exercise patterns" each had a significant influence on participant participation in post-surgical rehabilitation exercise. Binary logistic regression analyses identified "receiving information on rehabilitation exercise", "level of patient-perceived importance of rehabilitation exercise", and "having post-surgical exercise patterns" as important predictors of participation in a rehabilitation exercise program, with OR ratios of 112, 7.86, and 3.23 times respectively. These 3 factors accounted for 90.1% of the total variance. Patient education on coronary bypass post-surgical rehabilitation exercise programs should be emphasized during pre-surgical consultation and care in order to facilitate the recovery of normal life functions following coronary bypass surgery.

Another option for biliary access in post-bypass patient: intentional disruption of a gastric staple line

Another option for biliary access in post-bypass patient: intentional disruption of a gastric staple line

A controlled trial of home-based cardiac rehabilitation versus usual hospital care in cardiac patients

Objective This study aimed to evaluate the effect of a home-based cardiac rehabilitation (CR) program combining a home-based exercise training program with phone calls counselling educational talks and group workshops on surgery, risk factors, recovery, healthy lifestyle and physical activities on post-bypass patients. Method Forty-nine participants were randomized to either a control group (standard hospital, n = 21) or an intervention group (home-based CR, n = 28) in King Fahd Armed Forces Hospital, Jeddah. Data were collected before hospital discharge (baseline test) and repeated 6 months after hospital discharge (follow-up test). Results No significant differences between the groups in body mass index ( p = 0.691), hemodynamics ( p > 0.05), the serum fasting lipid profile ( p > 0.05) and Quality of Life questionnaire (QoL) ( p = 0.358), with differences in physical function ( p = 0.000) and Hospital Anxiety and Depression Scales (HADS) ( p p = 0.000), triglycerides ( p = 0.033), high density lipoprotein cholesterol ( p = 0.005), physical function ( p = 0.000) and QoL and HADS questionnaires ( p = 0.000). The intervention group also demonstrated significant improvements in QoL ( p = 0.000), HADS ( p p = 0.000), heart rate ( p = 0.001), high density lipoprotein cholesterol ( p = 0.032) and physical function ( p = 0.000), while significant differences were observed in the control group in heart rate ( p = 0.011), QoL ( p = 0.000) and physical function ( p = 0.000) between baseline and follow-up tests. Conclusion The home-based CR program improves health-related QoL and risk factor profiles for patients following CABG to greater extent than standard hospital care.

Impact of endoscopic versus open saphenous vein harvest technique on late coronary artery bypass grafting patient outcomes in the ROOBY (Randomized On/Off Bypass) Trial

In the Randomized On/Off Bypass (ROOBY) Trial, the efficacy of on-pump versus off-pump coronary artery bypass grafting was evaluated. This ROOBY Trial planned subanalysis compared the effects on postbypass patient clinical outcomes and graft patency of endoscopic vein harvesting and open vein harvesting. From April 2003 to April 2007, the technique used for saphenous vein graft harvesting was recorded in 1471 cases. Of these, 894 patients (341 endoscopic harvest and 553 open harvest) also underwent coronary angiography 1 year after coronary artery bypass grafting. Univariate and multivariable analyses were used to compare patient outcomes in the endoscopic and open groups. Preoperative patient characteristics were statistically similar between the endoscopic and open groups. Endoscopic vein harvest was used in 38% of the cases. There were no significant differences in both short-term and 1-year composite outcomes between the endoscopic and open groups. For patients with 1-year catheterization follow-up (n=894), the saphenous vein graft patency rate for the endoscopic group was lower than that in the open harvest group (74.5% vs 85.2%, P<.0001), and the repeat revascularization rate was significantly higher (6.7% vs 3.4%, P<.05). Multivariable regression documented no interaction effect between endoscopic approach and off-pump treatment. In the ROOBY Trial, endoscopic vein harvest was associated with lower 1-year saphenous vein graft patency and higher 1-year revascularization rates, independent of the use of off-pump or on-pump cardiac surgical approach.

CT Perfusion with Angiography as a Substitute for both Conventional Digital Subtraction Angiography and Acetazolamide-Challenged SPECT in the Follow-Up of Postbypass Patients

Background: We evaluated the clinical usefulness of CT perfusion (CTP) with angiography (CTA) as an alternative to digital subtraction angiography (DSA) and acetazolamide (ACZ)-challenged single-photon emission computed tomography (SPECT) in the follow-up evaluation of hemodynamic changes and bypass patency after bypass surgery in chronic cerebral ischemic diseases. Methods: Thirty-five patients who underwent superficial temporal artery/middle cerebral artery bypass surgery for chronic cerebral ischemic diseases were retrospectively enrolled. We assessed the relationship between CTP parameters [cerebral blood volume, cerebral blood flow (CBF), mean transit time (MTT), affected-to-unaffected hemisphere (ATU) ratio of perfusion parameters and MTT differences between hemispheres] and SPECT parameters (regional CBF and cerebrovascular reserve) and compared the preoperative CTP parameters with the postoperative ones. For the bypass patency, we compared CTA with DSA. Results: MTT showed the best correlation with CVR of SPECT (r = –0.343; p < 0.001). ATU ratio (r = –0.547; p < 0.001) and ATU differences (r = –0.592; p < 0.001) of MTT correlated well with the ATU ratio of rCBF on ACZ-challenged SPECT. Significant improvement of perfusion parameters could be demonstrated in the affected vascular territory with postoperative CTP. The CTA findings were consistent with those of DSA in 96% of the cases. The examination-related complication rate was 0, 2.8 and 8.6% for CT studies, DSA and SPECT, respectively. Conclusions: CTP performed simultaneously with CTA seems to be a safe and efficient substitute for DSA and ACZ-challenged SPECT in the follow-up evaluation after bypass surgery in patients with chronic cerebral ischemic diseases.

Manual aspiration prior to stenting does not reduce the incidence of filter no reflow in saphenous vein graft lesions protected by FilterWire EX/EZ

The beneficial role of manual thrombus aspiration in thrombus-containing lesions has been proven in acute myocardial infarction but data is lacking in saphenous vein graft lesions. From January 2004 to December 2008, 74 consecutive post-bypass patients underwent percutaneous coronary interventions to 76 saphenous vein graft lesions under the protection of FilterWire EX/EZ. Among them, the latest 25 consecutive patients with 25 lesions were treated with manual aspiration before stenting. The incidence of filter no reflow was compared between patients with and without manual aspiration pretreatment. No major difference in demography, clinical, lesion, and procedure characteristics, and in-hospital outcome has been observed between the two patient groups. Most importantly, the incidence of filter no reflow has not been reduced (32.0% versus 19.6%, P = 0.26) by manual aspiration, even among thrombus-containing lesions (63.2% versus 64.7%, P = 1.00). The absence of diabetes mellitus is found to be the independent predictor for the occurrence of filter no reflow. Adjunctive manual thrombus aspiration fails to reduce the filter no reflow, and probably has no additional benefit in saphenous vein graft lesions already protected by FilterWire EX/EZ.

Paclitaxel‐Eluting Stents for Chronically Occluded Saphenous Vein Grafts (EOS) Study

The aim of this study was to report the feasibility, short- and medium-term results of percutaneous coronary intervention (PCI) on saphenous vein graft (SVG) chronic total occlusions (CTO) using paclitaxel-eluting stents (PES). In postbypass patients, PCI on SVG CTO, rather than native vessel CTO, is another treatment option. However, the acute procedural and medium-term outcomes are unknown. Twenty-two consecutive, symptomatic postbypass patients underwent PCI on SVG CTO; angiographic success was seen in 16 patients (73%). The successful cases were evaluated at 1 year; restudy angiography was performed at 11 +/- 5 months in 15 patients (94%). The patients had a mean age of 73 years with predominance of male (68%); the mean SVG age was 14 years. On average, patients received 3.4 PESs per lesion; the stent size was 3.5 +/- 0.4 mm with a total stent length of 98 +/- 34 mm. The use of embolic protection devices and glycoprotein IIb/ IIIa inhibitors was observed in 6 (38%) and 5 (31%) patients, respectively. The in-hospital major adverse cardiac event (MACE) was 13%, accountable by 2 patients with postprocedure myocardial infarction. At follow-up, 6 patients had angiographic restenosis (40%); there was 1 noncardiac death and 3 target vessel revascularizations. The 1-year MACE was 25%; the graft survival free of occlusion and revascularization was 56%. PCI on SVG CTO is a feasible approach with a fairly high success and low in-hospital complication. However, it is associated with a relatively high angiographic restenosis and MACE at 1 year.

Paclitaxel-Eluting Stents for Chronically Occluded Saphenous Vein Grafts (EOS) Study.

Objectives:The aim of this study was to report the feasibility, short- and medium-term results of percutaneous coronary intervention (PCI) on saphenous vein graft (SVG) chronic total occlusions (CTO) using paclitaxel-eluting stents (PES). Background:In postbypass patients, PCI on SVG CTO, rather than native vessel CTO, is another treatment option. However, the acute procedural and medium-term outcomes are unknown. Methods:Twenty-two consecutive, symptomatic postbypass patients underwent PCI on SVG CTO; angiographic success was seen in 16 patients (73%). The successful cases were evaluated at 1 year; restudy angiography was performed at 11 +/- 5 months in 15 patients (94%). Results:The patients had a mean age of 73 years with predominance of male (68%); the mean SVG age was 14 years. On average, patients received 3.4 PESs per lesion; the stent size was 3.5 +/- 0.4 mm with a total stent length of 98 +/- 34 mm. The use of embolic protection devices and glycoprotein IIb/ IIIa inhibitors was observed in 6 (38%) and 5 (31%) patients, respectively. The in-hospital major adverse cardiac event (MACE) was 13%, accountable by 2 patients with postprocedure myocardial infarction. At follow-up, 6 patients had angiographic restenosis (40%); there was 1 noncardiac death and 3 target vessel revascularizations. The 1-year MACE was 25%; the graft survival free of occlusion and revascularization was 56%. Conclusions:PCI on SVG CTO is a feasible approach with a fairly high success and low in-hospital complication. However, it is associated with a relatively high angiographic restenosis and MACE at 1 year. (J Interven Cardiol 2010;**:1-6).

Nonrevascularizable coronary artery disease following coronary artery bypass graft surgery: a population-based study in Olmsted County, Minnesota

Therapeutic options for patients with recurrent cardiac ischemia after coronary artery bypass surgery may be limited and some patients may be considered nonrevascularizable. To further the understanding of this patient cohort, we performed a population-based study of post-coronary bypass patients who developed recurrent angina. Patients who underwent coronary artery and bypass graft angiography at Mayo Clinic from 2001 to 2005 were identified. Medical records were reviewed to determine indication for angiography, and angiographic analysis was performed in all patients. Among 133 000 residents of Olmsted County, Minnesota, 347 post-bypass patients with angina underwent coronary angiography from 2001 to 2005. Of these, 177 patients received further revascularization (145 percutaneous coronary intervention and 32 redo coronary artery bypass grafting) and the remaining 170 patients were managed medically. Revascularization was not associated with improvement in all-cause or cardiac mortality. Multivariate analysis identified renal dysfunction, diabetes, and severe left ventricular dysfunction but not the lack of revascularization as predictors of mortality. In this population-based study, we identified a yearly incidence range of 17.9-33.2 patients with nonrevascularizable angina after coronary artery bypass grafting per 100 000 population. Further revascularization was not associated with improved mortality or morbidity. Attempts to develop therapeutics for this population must consider the incidence and outcomes of this cohort.

In-Hospital and Long-Term Prognosis after Myocardial Infarction in Patients with Prior Coronary Artery Bypass Surgery; 19-Year Experience

To present a 19-year experience of the prognosis of patients with acute myocardial infarction (AMI) and prior coronary artery bypass surgery (CABS), 748 patients with AMI after prior CABS (postbypass group) and a control group of 1080 patients with AMI, but without prior CABS, were analyzed. All indexes of infarct size were lower in the postbypass group. There was more ventricular fibrillation in the postbypass group. In-hospital mortality was similar (p = 0.3675). In the follow-up period, postbypass patients had more heart failure, recurrent CABS, reinfarction, and unstable angina than did control patients. Cumulative survival was better in the control group than in the postbypass group (p = 0.0403). Multiple logistic regression model showed that previous angina (p = 0.0005), diabetes (p = 0.0058), and age (p = 0.0102) were independent predictor factors for survival. Use of digitalis and diuretics, together with previous angina, also influenced survival (p = 0.0092), as well as male gender, older patients, and diabetes together (p = 0.0420). Patients with AMI after prior CABS had smaller infarct, but more reinfarction, reoperation, heart failure, and angina. Previous angina, diabetes, and age, independently, as well as use of digitalis and diuretics together with angina, and male gender, older patients, and diabetes together, influenced a worse survival rate in these patients.

Abstract 2299: Post-CABG Patients with Non-Revascularizable Coronary Artery Disease - A Population Based Study from Olmsted County, Minnesota

Advances in molecular and cellular biology have supported the development of new therapeutic approaches to limiting ischemia. Most often these approaches target patients with ischemia post coronary artery bypass grafting (CABG). Currently, there are few data available on the incidence and outcomes of such patients. To understand this important patient cohort and to estimate the potential need for new therapies, we performed a population-based study of post CABG patients who underwent coronary and graft angiography for angina from 2001 – 2005. Patients who underwent coronary artery and bypass graft angiography at Mayo Clinic from 2001 – 2005 were identified. Medical records were reviewed to determine indication for angiography, and angiographic analysis was performed in all patients. The study cohort was then followed prospectively until March 1 2008. Among 133,000 residents of Olmsted County, Minnesota, 347 post bypass patients with angina underwent coronary angiography from 2001 – 2005. Of those, 51% (177 patients) received further revascularization (endovascular and surgical) and the remaining 170 patients were managed medically. There was no statistical difference in terms of all cause mortality and cardiac mortality between the group that received further revascularization and the group that did not. Adjusting for age and sex for differences between the Olmsted County population and the US white 2000 population yields a yearly incidence rate of 17.9 (95% CI 14.2–21.6) to 33.2 (95% CI 28.2 – 38.3) patients with non-revascularizable angina following CABG per 100,000 population. There was no difference in all cause or cardiac mortality in post-CABG patients presenting with angina whether they received further endovascular/surgical revascularization or not. We estimate that non-revascularizable coronary artery disease post CABG arises in approximately 50,000 (95% CI 40,000 – 61,000) to 93,000 (95% CI 79,000 – 110,000) patients per year extrapolating to the entire US population as a whole.