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• W4223421011 abstract "PCI in Patients With Heart Failure: Current Evidence, Impact of Complete Revascularization, and Contemporary Techniques to Improve OutcomesJournal of the Society for Cardiovascular Angiography & InterventionsVol. 1Issue 2100020PreviewCoronary artery disease (CAD) is the most common cause of left ventricular systolic dysfunction (LVSD) and heart failure (HF). Revascularization with coronary artery bypass grafting (CABG) reduces all-cause mortality compared with medical therapy alone for these patients. Despite this, CABG is performed in a minority of patients with HF, partly due to patient unwillingness or inability to undergo major cardiac surgery and partly due to physician reluctance to refer for surgery due to high operative risk. Full-Text PDF Open Access “Opportunity is often Delivered in a Fog of Uncertainty”Jon Kabat-ZinnSix million adult Americans live with heart failure (HF), and the prevalence is expected to increase by 46% by the year 2030.1Tsao C.W. Aday A.W. Almarzooq Z.I. et al.Heart disease and stroke statistics-2022 update: a report from the American Heart Association.Circulation. 2022; 145: e153-e163Google Scholar Two-thirds of all HF diagnoses are primarily ischemic in origin.2Parikh P.B. Bhatt D.L. Bhasin V. et al.Impact of percutaneous coronary intervention on outcomes in patients with heart failure: JACC state-of-the-art review.J Am Coll Cardiol. 2021; 77: 2432-2447Google Scholar While coronary artery bypass graft (CABG) surgery has been demonstrated to improve survival in patients with HF and coronary artery disease (CAD), less than 10% ultimately undergo surgical revascularization.3Doshi D. Ben-Yehuda O. Bonafede M. et al.Underutilization of coronary artery disease testing among patients hospitalized with new-onset heart failure.J Am Coll Cardiol. 2016; 68: 450-458Google Scholar Potential explanations for this finding include the following: 1) increasingly older patients presenting with complex age-related comorbidities; 2) clinical and coronary anatomic complexities such as diffuse disease, heavy coronary calcification, long lesions, and/or poor native vessel targets for bypass grafting; and 3) physiologic complexities related to systolic and diastolic HF and hemodynamic derangements, including pulmonary hypertension and cardiogenic shock.4Riley R.F. Henry T.D. Mahmud E. et al.SCAI position statement on optimal percutaneous coronary interventional therapy for complex coronary artery disease.Catheter Cardiovasc Interv. 2020; 96: 346-362Google Scholar As a result, an increasing number of patients with HF and CAD are referred to multidisciplinary heart teams for “complex high-risk (and indicated) percutaneous coronary intervention” (PCI).4Riley R.F. Henry T.D. Mahmud E. et al.SCAI position statement on optimal percutaneous coronary interventional therapy for complex coronary artery disease.Catheter Cardiovasc Interv. 2020; 96: 346-362Google Scholar While advances in hemodynamic support and interventional techniques have afforded us a higher likelihood of technical success and more complete revascularization, the role of PCI in patients with HF due to impaired left ventricular systolic function remains unclear, particularly in the absence of randomized clinical trials proving its superiority or noninferiority compared to CABG and/or medical therapy.2Parikh P.B. Bhatt D.L. Bhasin V. et al.Impact of percutaneous coronary intervention on outcomes in patients with heart failure: JACC state-of-the-art review.J Am Coll Cardiol. 2021; 77: 2432-2447Google Scholar,5Maron D.J. Hochman J.S. Reynolds H.R. et al.Initial invasive or conservative strategy for stable coronary disease.N Engl J Med. 2020; 382: 1395-1407Google Scholar In this issue of the Journal of the Society for Cardiovascular Angiography and Interventions, Ahmad et al.6Ahmad Y. Petrie M.C. Jolicoeur E.M. et al.PCI in heart failure: current evidence, impact of complete revascularization, and techniques to improve outcomes.Journal of the Society for Cardiovascular Angiography and Interventions. 2022; 1100020Google Scholar provide a comprehensive review of the current evidence for PCI in HF. Observational studies comparing PCI to CABG in HF, strategies to achieve optimal PCI results, the impact of complete revascularization on clinical outcomes, the role of viability testing, and the emergence of advanced mechanical circulatory support devices to facilitate complex high-risk (and indicated) PCI are reviewed. They highlight several unanswered questions in the field and burgeoning research studies which will better inform patient care. The review appropriately highlights the remarkable absence of any randomized controlled clinical trial evaluating PCI in this setting. However, additional gaps in knowledge remain that merit further discussion and investigation (Table 1). For example, what is the influence of nonobstructive CAD on outcomes in patients with HF? Classically, ischemic cardiomyopathy has been defined as HF in patients with prior myocardial infarction (MI), PCI or CABG, or ≥75% luminal stenosis in ≥2 epicardial vessels.7Felker G.M. Shaw L.K. O’Connor C.M. A standardized definition of ischemic cardiomyopathy for use in clinical research.J Am Coll Cardiol. 2002; 39: 210-218Google Scholar Little is known, however, about the prognosis of patients with HF with nonobstructive CAD compared to those with no angiographic CAD, 2 cohorts that have historically been categorized as “nonischemic.” Is the mere presence of coronary atherosclerosis in the setting of HF an “innocent bystander” or is it a harbinger of future adverse events? A contemporary analysis of 12,814 patients with left ventricular ejection fraction (LVEF) <35% from the Canadian CorHealth Cardiac Registry (2010 to 2015) reported an 82% increased risk of CV death and an 18% incremental risk of all-cause death in patients with nonobstructive CAD compared to patients without angiographic CAD.8Braga J.R. Austin P.C. Ross H.J. Tu J.V. Lee D.S. Importance of nonobstructive coronary artery disease in the prognosis of patients with heart failure.JACC Heart Fail. 2019; 7: 493-501Google Scholar However, interestingly there was no difference in the risk of acute MI, HF, or stroke,8Braga J.R. Austin P.C. Ross H.J. Tu J.V. Lee D.S. Importance of nonobstructive coronary artery disease in the prognosis of patients with heart failure.JACC Heart Fail. 2019; 7: 493-501Google Scholar which runs counter to contemporary beliefs that implicate nonobstructive vulnerable plaque as the putative cause of acute ischemic events. There is also increasing recognition of the role coronary microvascular dysfunction plays in mediating myocardial ischemia in patients with HF due to both reduced and preserved ejection fraction who also have nonobstructive CAD.9Del Buono M.G. Montone R.A. Camilli M. et al.Coronary microvascular dysfunction across the spectrum of cardiovascular diseases: JACC state-of-the-art review.J Am Coll Cardiol. 2021; 78: 1352-1371Google Scholar,10Rush C.J. Berry C. Oldroyd K.G. et al.Prevalence of coronary artery disease and coronary microvascular dysfunction in patients with heart failure with preserved ejection fraction.JAMA Cardiol. 2021; 6: 1130-1143Google Scholar These observations highlight the need for better risk stratification and more effective targeted therapies for the varying phenotypes of CAD and microcirculatory dysfunction that coexist with HF.2Parikh P.B. Bhatt D.L. Bhasin V. et al.Impact of percutaneous coronary intervention on outcomes in patients with heart failure: JACC state-of-the-art review.J Am Coll Cardiol. 2021; 77: 2432-2447Google ScholarTable 1Existing and potential research opportunities for PCI in ischemic cardiomyopathyClinical gaps in knowledgeStudy designs1. PCI in acute HFrEF without CSRCT1. STEMI-DTU (pVAD + PCI vs. PCI)(NCT03947619)2. PCI in acute HFrEF with CSRCT1. DanGer Shock (pVAD + PCI vs PCI)(NCT01633502)2. ECLS-SHOCK (ECMO + PCI vs PCI)(NCT03637205)3. EURO-SHOCK (PCI + Early ECMO vs. PCI)(NCT03813134)4. ANCHOR (ECMO + IABP vs SOC)(NCT04184635)3. PCI in chronic HFrEF without CSRCT1. PROTECT IV (pVAD + HR-PCI vs. SOC PCI with or without IABP)(NCT04763200)2. REVIVED-BCIS2 (PCI + OMT vs PCI) (NCT01920048)4. PCI in HFpEFRCT or OS5. Physiology-guided PCI in chronic HFrEF and HFpEFRCT6. Viability-guided PCI with cMR in chronic HFrEFRCT7. Complete vs incomplete PCI revascularization in HFrEFRCT or OS8. Prognosis of nonobstructive CAD in chronic HFrEF and HFpEFProspective multicenter OS9. Mechanism of benefit of PCI in acute and chronic HFrEFRCT or OS1. PROTECT IV (pVAD + HR-PCI vs. SOC PCI with or without IABP)(NCT04763200)2. STEMI-DTU (pVAD + PCI vs. SOC PCI)(NCT03947619)10. Impact of frailty on acute and chronic PCI outcomes in HFrEF + HFpEFRCTProspective multicenter OScMR, cardiac magnetic resonance imaging; CS, cardiogenic shock; DanGer Shock, Danish-German Cardiogenic Shock; ECLS-SHOCK, extracorporeal life support in cardiogenic shock; HFpEF, heart failure with preserved ejection fraction; HFrEF, heart failure with reduced ejection fraction; HR-PCI, high-risk percutaneous coronary intervention; PCI, percutaneous coronary intervention; pVAD, percutaneous ventricular assist device; RCT, randomized controlled trial; OS, observational study; SOC, standard of care; STEMI-DTU, ST-Elevation Myocardial Infarction Door-to-Unload Trial. Open table in a new tab cMR, cardiac magnetic resonance imaging; CS, cardiogenic shock; DanGer Shock, Danish-German Cardiogenic Shock; ECLS-SHOCK, extracorporeal life support in cardiogenic shock; HFpEF, heart failure with preserved ejection fraction; HFrEF, heart failure with reduced ejection fraction; HR-PCI, high-risk percutaneous coronary intervention; PCI, percutaneous coronary intervention; pVAD, percutaneous ventricular assist device; RCT, randomized controlled trial; OS, observational study; SOC, standard of care; STEMI-DTU, ST-Elevation Myocardial Infarction Door-to-Unload Trial. Understanding the precise mechanisms through which PCI might benefit patients with HF is critical to both patient selection and PCI strategy. There is a paucity of data elucidating the potential mechanisms of benefit of PCI and its effect on myocardial recovery in patients with HF since these patients have been under-represented in clinical trials.5Maron D.J. Hochman J.S. Reynolds H.R. et al.Initial invasive or conservative strategy for stable coronary disease.N Engl J Med. 2020; 382: 1395-1407Google Scholar In the Initial Invasive or Conservative Strategy for Stable Coronary Disease (ISCHEMIA) trial, patients with LVEF <35% or New York Association III or IV HF were excluded.5Maron D.J. Hochman J.S. Reynolds H.R. et al.Initial invasive or conservative strategy for stable coronary disease.N Engl J Med. 2020; 382: 1395-1407Google Scholar A propensity matched analysis from the Duke Databank for Cardiovascular Disease of 901 patients with stable CAD and LVEF ≤35% undergoing PCI or medical therapy demonstrated no difference in the rate of all-cause mortality or cardiovascular hospitalization between therapies (hazard ratio: 1.18; 95% confidence interval: 0.96-1.44). Recent observational studies suggest that not only is PCI feasible in select patients with multivessel CAD and HF, but it may also be associated with reverse left ventricle (LV) remodeling and improved LVEF when performed with microaxial flow-mediated LV support and more complete revascularization.11Daubert M.A. Massaro J. Liao L. et al.High-risk percutaneous coronary intervention is associated with reverse left ventricular remodeling and improved outcomes in patients with coronary artery disease and reduced ejection fraction.Am Heart J. 2015; 170: 550-558Google Scholar Whether PCI impacts the risk of sudden cardiac death and/or need for implantable cardioverter defibrillators in this patient population remains unknown.12Lewis G.F. Harless A.C. Vazquez L. et al.Natural history and implantable cardioverter-defibrillator implantation after revascularization for stable coronary artery disease with depressed ejection fraction.Clin Cardiol. 2015; 38: 715-719Google Scholar The Impella-Supported PCI in High-Risk Patients with Complex Coronary Artery Disease and Reduced Left Ventrticular Function (PROTECT IV, NCT04763200) should provide further insight into whether LV-assisted PCI improves outcomes, LV systolic function, and quality of life in high-risk patients with impaired LV systolic function and complex CAD. Optimal patient selection and revascularization strategy for PCI in this context are particularly germane for patients with HF who are frail and older than 65 years, a rapidly growing segment of the population. Nearly 45% of patients with HF have frailty, and many are older adults.13Ijaz N. Buta B. Xue Q.-L. et al.Interventions for frailty among older adults with cardiovascular disease.J Am Coll Cardiol. 2022; 79: 482-503Google Scholar While a number of tools have been developed to risk stratify older frail patients with cardiovascular disease, many were intended for use in the outpatient setting and not specifically for PCI.13Ijaz N. Buta B. Xue Q.-L. et al.Interventions for frailty among older adults with cardiovascular disease.J Am Coll Cardiol. 2022; 79: 482-503Google Scholar Given the inextricable links between age, frailty, cardiovascular disease risk, and outcomes, the multidisciplinary heart team considering PCI in the older adult HF cohort needs to be armed with more effective risk stratification tools and a better understanding of the role of non-PCI therapies (physical, pharmacologic, nutritional, cognitive, and psychosocial).13Ijaz N. Buta B. Xue Q.-L. et al.Interventions for frailty among older adults with cardiovascular disease.J Am Coll Cardiol. 2022; 79: 482-503Google Scholar Ahmad et al. provide a contemporary review that calls attention to the multiple vagaries that exist within an important clinical problem that continues to vex practitioners. The most informative clinical trials of PCI for HF in the future will need to evaluate hard clinical outcomes (death, MI, cardiovascular and cerebrovascular events, and recurrent ischemia), identify mechanisms of benefit (ie, impact on ischemia, viability, and arrhythmia), and provide long-term follow-up of symptoms, quality of life, and HF hospitalizations. Given the complexities and risk/benefit trade-offs associated with PCI in this setting, patient shared decision-making must assume a central role and proceduralists should strive for “interventional virtuosity” by achieving complete revascularization, routinely using intravascular imaging/physiology, and taking specific measures to avoid bleeding, vascular complications, and acute kidney injury. Until further clinical trials guide us out of this “fog of therapeutic uncertainty,” clinicians must rely on available data as summarized by Ahmad et al. and our collective clinical experience to best inform therapeutic decisions. Dr Tehrani has received research grants from Boston Scientific and Inari Medical. He also serves a consultant to Boston Scientific, and he is on the advisory board for Abbott. Dr Damluji receives research funding from the Pepper Scholars Program of the Johns Hopkins University Claude D. Pepper Older Americans Independence Center (OAIC) funded by the National Institute on Aging P30-AG021334. Dr Batchelor serves as a consultant for Boston Scientific, Abbott, Medtronic, and V-Wave and receives research grant support from Abbott and Boston Scientific." @default.
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• W4223421011 title "Percutaneous Coronary Intervention in Heart Failure: Knowledge Gaps and Opportunities" @default.
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