JACC This Week

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Individual Variation in Tirzepatide Response | JACC | ACC.25 Apr 01, 2025

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Join JACC Associate Editor Khurram Nasir, MBBS, FACC, and author Rohan Khera, MD, FACC, as they discuss the latest study on tirzepatide presented at ACC.25 and published in JACC. Tirzepatide, a dual GIP/GLP-1 receptor agonist, exerts pleiotropic effects on cardiometabolic health. This study evaluated its efficacy in improving cardiometabolic outcomes in individuals with T2D. An individual participant data meta-analysis was conducted, pooling data from seven Phase 3 RCTs comparing tirzepatide with placebo or standard antihyperglycemic agents. The study outcomes included cardiometabolic components of metabolic syndrome (MetS), elevated BMI, and MetS. Tirzepatide significantly reduced the odds of these abnormalities and effectively resolved MetS, with superior efficacy observed in younger individuals and those not on baseline SGLT2is. These findings support the potential of tirzepatide to improve cardiometabolic health in T2D.

Survival After Sudden Cardiac Arrest in Athletes | JACC | ACC.25 Apr 01, 2025

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This discussion between JACC: Clinical Electrophysiology Associate Editor Sumeet Chugh, MD, FACC and author Jonathan Drezner discuss this research study presented at ACC.25 and published in JACC. In the observational study, they identified cases of sudden cardiac arrest (SCA) among young competitive athletes >/=11 years old from 7/1/2014-7/30/2023. During the 9-year study period, overall survival after SCA (49%,range 30-66%) and survival after exertional SCA (57%,range 38-72%) increased. Black race (RR=0.63,95% CI 0.53-0.76), Other race (RR=0.69,95% CI 0.50-0.94), and non-exertional SCA (RR=0.43,95% CI 0.32-0.59) were associated with lower survival from SCA adjusting for level of competition and sex. While survival from SCA among young competitive athletes in the United States has improved in the last decade, important racial disparities in outcomes were observed warranting additional research and prevention strategies.

Self-Expanding Valve Outcomes at 5 Years Compared to Surgery | JACC | ACC.25 Apr 01, 2025

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Makoto Mori, MD, JACC: Associate Editor, is joined by author John K. Forrest, MD, FACC, discussing this study from Forrest et al presented at ACC.25 and published in JACC. Patients with severe aortic stenosis who were treated with either a supraannular self-expanding TAVR or surgery showed comparable rates of all-cause mortality and disabling stroke at 5 years, strengthening TAVR as a safe, effective, and durable alternative to surgery for patients, regardless of their surgical risk.

Gold Cards & Hidden Triggers: A New Look at Afib | JACC Baran Apr 01, 2025

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Hosts Mitsuaki Sawano, MD, and Regional Associate Editor Nobuhiro Ikemura, MD, welcome Takashi Ikenouchi, MD, a physician scientist at the Cedars-Sinai Medical Center, Smidt Heart Institute, to discuss the headline-grabbing "Gold Card" sale and a novel approach to atrial fibrillation: an embryological classification of arrhythmogenic triggers. While pulmonary vein isolation (PVI) remains the cornerstone of AF ablation, up to 30% of triggers originate outside the pulmonary veins, contributing to recurrence and suboptimal outcomes. As PVI outcomes begin to plateau, this embryology-informed framework—categorizing triggers into common pulmonary vein, sinus venosus, and primitive atrium origins—offers a path toward more personalized and precise AF therapies.

April 8, 2025 Issue Summary | JACC Mar 31, 2025

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In this episode, Dr. Valentin Fuster presents key findings from the April 8, 2025 issue of the Journal of the American College of Cardiology, covering three groundbreaking studies. Topics include the newly defined threshold for mild aortic stenosis using MRI, the relationship between heat wave exposure and cardiac mortality, and the long-term outcomes of aortic valve performance in patients undergoing TAVR versus surgery.

New Threshold for Defining Mild Aortic Stenosis Derived from Velocity-Encoded MRI in 60,000 Individuals | JACC Mar 31, 2025

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In this podcast, Dr. Valentin Fuster discusses a groundbreaking study on mild aortic stenosis, which redefines its diagnostic threshold using deep learning and velocity-encoded MRI. The findings suggest that even mild cases, previously considered benign, are linked to increased cardiovascular risks, highlighting the potential for early intervention and the critical role of AI in advancing cardiovascular research.

Nonlinear Relation between Cardiac Mortality and Excess Temperature in Heatwaves: Exposure Response in 2.39 Million Patients | JACC Mar 31, 2025

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In this podcast, Dr. Valentin Fuster discusses a groundbreaking study examining the non-linear relationship between cardiac mortality and heat waves, focusing on how excess temperature during these events can impact heart disease death rates. The study reveals that compound heat waves, involving both day and night temperatures, significantly increase mortality risks, emphasizing the need for more precise heat wave definitions and health measures to protect vulnerable populations in a warming climate.

Impact of Transcather or Surgical Aortic Valve Performance on 5-Year Outcomes in Patients at ≥Intermediate Risk | JACC Mar 31, 2025

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In this podcast, Dr. Valentin Fuster presents a study evaluating the five-year outcomes of Transcatheter Aortic Valve Replacement (TAVR) versus surgical aortic valve replacement in high-risk patients. The study shows that TAVR leads to significantly better valve performance but highlights that both procedures' long-term success is hindered by bioprosthetic valve dysfunction, underscoring the need for individualized treatment strategies and longer follow-up studies.

The Cardiovascular Care of the Pediatric Athlete | JACC Mar 31, 2025

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In this podcast, Dr. Valentin Fuster reviews a comprehensive study on the cardiovascular care of pediatric athletes, focusing on preventing sudden cardiac arrest and managing sports-related heart risks. The discussion highlights the importance of shared decision-making between healthcare providers, parents, and coaches, while addressing various heart conditions, screening strategies, and exercise recommendations for young athletes.

Incident Atrial Fibrillation in FINE-HEART | JACC | ACC.25 Mar 27, 2025

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This interview features JACC Associate Editor Neha Pagidipati, MD, FACC, speaking with Maria Pabon, MD and Muthu Vaduganathan, MD about their study on finerenone's role in reducing new-onset atrial fibrillation in patients with cardio-kidney metabolic disease. The discussion covers the methodology and findings of a pooled analysis from three major clinical trials, highlighting finerenone's 17% risk reduction in atrial fibrillation, its potential mechanisms, and the need for greater diversity in clinical trial populations. They also touch on comparative evidence with other mineralocorticoid receptor antagonists and the broader implications for heart failure management.

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