Publications by authors named "Michael Nassif"

Background: Standard-of-care (SoC) medications for the treatment of obstructive hypertrophic cardiomyopathy (oHCM) are recommended as first-line therapy despite the lack of evidence from controlled clinical trials and well known off-target side effects.

Objectives: We describe the impact of SoC therapy downtitration and withdrawal in patients already receiving aficamten in FOREST-HCM (Follow-Up, Open-Label, Research Evaluation of Sustained Treatment with Aficamten in Hypertrophic Cardiomyopathy; NCT04848506).

Methods: Patients receiving SoC therapy (beta-blocker, nondihydropyridine calcium-channel blocker, and/or disopyramide) were eligible for protocol-guided SoC downtitration and withdrawal at the discretion of the investigator and after achieving a stable dose of aficamten for ≥4 weeks.

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Background: Aficamten is a cardiac myosin inhibitor that mitigates left ventricular outflow gradients in obstructive hypertrophic cardiomyopathy (oHCM). The clinical efficacy of aficamten across multiple outcome domains in oHCM has not been fully defined.

Objectives: This responder analysis from the SEQUOIA-HCM (Phase 3 Trial to Evaluate the Efficacy and Safety of Aficamten Compared to Placebo in Adults With Symptomatic oHCM) trial characterizes the clinical impact of aficamten.

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Article Synopsis
  • The SEQUOIA-HCM trial examines the effectiveness of aficamten, a new cardiac myosin inhibitor, in improving exercise capacity in adults suffering from symptomatic obstructive hypertrophic cardiomyopathy (HCM).
  • The study involves a double-blind, placebo-controlled design, with participants recruited from 101 sites across 14 countries, focusing on those with objectively measured exertional intolerance.
  • The main goal is to assess changes in integrated exercise performance after 24 weeks of treatment using a combination of peak oxygen uptake and ventilation efficiency, along with monitoring clinical health outcomes.
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Background: A primary goal in treating obstructive hypertrophic cardiomyopathy (oHCM) is to improve patients' health status: their symptoms, function, and quality of life. The health status benefits of aficamten, a novel cardiac myosin inhibitor, have not been comprehensively described.

Objectives: This study sought to determine the effect of aficamten on patient-reported health status, including symptoms of fatigue, shortness of breath, chest pain, physical and social limitations, and quality of life.

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Background: Aficamten, a next-in-class cardiac myosin inhibitor, improved peak oxygen uptake (pVO) and lowered resting and Valsalva left ventricular outflow (LVOT) gradients in adults with symptomatic obstructive hypertrophic cardiomyopathy (oHCM) in SEQUOIA-HCM (Phase 3 Trial to Evaluate the Efficacy and Safety of Aficamten Compared to Placebo in Adults With Symptomatic oHCM), a phase 3, multicenter, randomized, double-blinded, placebo-controlled study.

Objectives: The authors sought to evaluate the effect of aficamten on echocardiographic measures of cardiac structure and function in SEQUOIA-HCM.

Methods: Serial echocardiograms were performed over 28 weeks in patients randomized to receive placebo or aficamten in up to 4 individually titrated escalating doses (5-20 mg daily) over 24 weeks based on Valsalva LVOT gradients and left ventricular ejection fraction (LVEF).

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Article Synopsis
  • * The study, called PROACTIVE-HF, assessed the safety and effectiveness of this monitoring method in 456 patients with chronic heart failure across various centers in the US and Europe.
  • * Results showed a 6-month event rate of 0.15 hospitalizations or deaths per patient, far below the goal of 0.43, with a very high safety rate for the device.
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Article Synopsis
  • Aficamten is a new drug that helps reduce heart issues in patients with obstructive hypertrophic cardiomyopathy by targeting heart muscle contractility and maintaining safe blood flow levels.
  • * In a clinical trial involving 282 patients, those receiving aficamten were able to maintain effective heart function with minimal side effects, including a stable reduction in heart muscle contraction without significant adverse events.
  • * The findings suggest that using a tailored dosing strategy for aficamten is effective and safe, improving cardiovascular health without worsening conditions like heart failure.
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Article Synopsis
  • The study focuses on patients with heart failure with reduced ejection fraction (HFrEF) and the importance of adhering to prescribed medication guidelines to improve health status.
  • Researchers analyzed the self-reported medication adherence of 3,495 outpatient participants over a 12-month period and found that nonadherent patients had worse health status at baseline and showed less improvement over time compared to those who followed their medication regimen.
  • Additionally, for patients who improved their adherence, there was a trend toward better health outcomes, highlighting the significance of medication adherence in managing HFrEF.
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Aims: The aim of this study was to report safety and efficacy of aficamten in patients with non-obstructive hypertrophic cardiomyopathy (nHCM) over 36 weeks in the ongoing FOREST-HCM trial.

Methods And Results: Patients were started on aficamten 5 mg daily, with doses adjusted in 5-mg increments (5-20 mg) at ≥2-week intervals according to site-read left ventricular ejection fraction (LVEF). Aficamten dose was increased if LVEF ≥55%, maintained if LVEF 50-54%, decreased if LVEF 40-<50%, and temporarily interrupted if LVEF <40%.

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Aims: Patients hospitalized for acute heart failure (HF) could be enrolled in EMPULSE (NCT04157751) upon haemodynamic stabilization and between 24 h and 5 days after hospital admission. The timing of treatment initiation may influence the efficacy and safety of drugs such as empagliflozin. The aim of this study was to evaluate patient characteristics, clinical events, and treatment effects according to time from admission to randomization.

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Background: One of the major determinants of exercise intolerance and limiting symptoms among patients with obstructive hypertrophic cardiomyopathy (HCM) is an elevated intracardiac pressure resulting from left ventricular outflow tract obstruction. Aficamten is an oral selective cardiac myosin inhibitor that reduces left ventricular outflow tract gradients by mitigating cardiac hypercontractility.

Methods: In this phase 3, double-blind trial, we randomly assigned adults with symptomatic obstructive HCM to receive aficamten (starting dose, 5 mg; maximum dose, 20 mg) or placebo for 24 weeks, with dose adjustment based on echocardiography results.

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Aim: The EMPULSE (EMPagliflozin in patients hospitalised with acUte heart faiLure who have been StabilizEd) trial showed that, compared to placebo, the sodium-glucose cotransporter 2 inhibitor empagliflozin (10 mg/day) improved clinical outcomes of patients hospitalized for acute heart failure (HF). We investigated whether efficacy and safety of empagliflozin were consistent across the spectrum of left ventricular ejection fraction (LVEF).

Methods And Results: A total of 530 patients hospitalized for acute de novo or decompensated HF were included irrespective of LVEF.

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Background: Heart failure with preserved ejection fraction is associated with significant functional limitations, yet treatments for improving exercise performance have been elusive. We sought to explore the association between prespecified patient characteristics and changes in 6-minute walk distance that constitute a clinically significant response to dapagliflozin.

Methods: We performed a responder analysis to understand patient characteristics associated with clinically meaningful improvement in 6-minute walk test (6MWT) distance ≥15 m among patients randomized to 12 weeks of dapagliflozin versus placebo in the double-blind PRESERVED-HF trial (Effects of Dapagliflozin on Biomarkers, Symptoms and Functional Status in Patients With Preserved Ejection Fraction Heart Failure).

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Hospital at home (HaH) is an innovative care model that may be particularly suited for heart failure (HF). Outpatient visits and inpatient care have been the 2 traditional settings for HF care, yet may not match the social and medical needs of patients at all times. Alternative models such as HaH may represent an effective and patient-centered option for select patients with worsening HF.

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Aims: In patients hospitalized for acute heart failure (AHF) empagliflozin produced greater clinical benefit than placebo. Many patients with AHF are treated with mineralocorticoid receptor antagonists (MRAs). The interplay between empagliflozin and MRAs in AHF is yet to be explored.

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Background: Remote monitoring of pulmonary artery (PA) pressures and serial N-terminal pro-B-type natriuretic peptide (NT-proBNP) measurements guide heart failure (HF) treatment, but their association has yet to be described.

Methods And Results: In the Empagliflozin Evaluation by Measuring the Impact on Hemodynamics in Patients with Heart Failure (EMBRACE-HF) trial, patients with HF and a remote PA pressure monitoring device were randomized to empagliflozin vs placebo. PA diastolic pressures (PADP) and NT-proBNP levels were obtained at baseline and 6 and 12 weeks.

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Background: Patients with heart failure (HF) have a high burden of symptoms and physical limitations, regardless of ejection fraction (EF). Whether the benefits of SGLT2 (sodium-glucose cotransporter-2) inhibitors on these outcomes vary across the full range of EF remains unclear.

Methods: Patient-level data were pooled from the DEFINE-HF trial (Dapagliflozin Effects on Biomarkers, Symptoms, and Functional Status in Patients With Heart Failure With Reduced Ejection Fraction) of 263 participants with reduced EF (≤40%), and PRESERVED-HF trial (Effects of Dapagliflozin on Biomarkers, Symptoms and Functional Status in Patients With Preserved Ejection Fraction Heart Failure) of 324 participants with preserved EF (≥45%).

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Background: Although studies consistently show that beta-blockers reduce morbidity and mortality in patients with reduced ejection fraction (EF), data are inconsistent in patients with heart failure with mildly reduced ejection fraction (HFmrEF) and suggest potential negative effects in heart failure with preserved ejection fraction (HFpEF).

Objectives: The purpose of this study was to examine the association of beta-blockers with heart failure (HF) hospitalization and death in patients with HF and EF ≥40% METHODS: Beta-blocker use was assessed at first encounter in outpatients ≥65 years of age with HFmrEF and HFpEF in the U.S.

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Background: There has been growing Interest in patient-centered clinical trials using mobile technologies to reduce the need for in-person visits. The CHIEF-HF (Canagliflozin Impact on Health Status, Quality of Life and Functional Status in Heart Failure) trial was designed as a double-blind, randomized, fully decentralized clinical trial (DCT) that identified, consented, treated, and followed participants without any in-person visits. Patient-reported questionnaires were the primary outcome, which were collected by a mobile application.

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Aims: The EMPULSE trial evaluated the clinical benefit of empagliflozin versus placebo using the stratified win ratio approach in 530 patients with acute heart failure (HF) after initial stabilization. We aim to elucidate how this method works and what it means, thereby giving guidance for use of the win ratio in future trials.

Methods And Results: The primary trial outcome is a hierarchical composite of death, number of HF events, time to first HF event, or a ≥5-point difference in Kansas City Cardiomyopathy Questionnaire (KCCQ) total symptom score change at 90 days.

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Durable implantable left ventricular assist devices (LVADs) have been shown to improve survival and quality of life for patients with stage D heart failure. Even though LVADs remain underused overall, the number of patients with heart failure supported with LVADs is steadily increasing. Therefore, general cardiologists will increasingly encounter these patients.

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