Cardiology Today

Welcome to Cardiology Today – Recorded April 04, 2026. This episode summarizes 5 key cardiology studies on topics like arrhythmia vulnerability and catheter ablation. Key takeaway: Senolytics Prevent Atrial Arrhythmias in Elderly. Article Links: Article 1: Impact of left atrial posterior wall isolation using pulsed-field ablation in patients undergoing repeat catheter ablation for atrial fibrillation. (Heart rhythm) Article 2: Comparison of combined anatomic and functional modeling with purely anatomic assessment in scar-dependent ventricular tachycardia. (Heart rhythm) Article 3: Senolytic reduction of senescent cells mitigates atrial arrhythmia vulnerability in aging rabbits. (Heart rhythm) Article 4: Real-world performance of intrinsic antitachycardia pacing: Primary results from a global prospective postapproval registry study. (Heart rhythm) Article 5: Purkinje and septal substrate modification as a therapeutic option for patients with STEMI and refractory ventricular fibrillation. (Heart rhythm) Full episode page: https://podcast.explainheart.com/podcast/senolytics-prevent-atrial-arrhythmias-in-elderly-04-04-26/ Featured Articles Article 1: Impact of left atrial posterior wall isolation using pulsed-field ablation in patients undergoing repeat catheter ablation for atrial fibrillation. Journal: Heart rhythm PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41519351 Summary: For patients undergoing repeat catheter ablation for atrial fibrillation (AF), a therapeutic approach involves either redo pulmonary vein isolation (PVI) alone or combining redo PVI with adjunctive posterior wall isolation (PWI). The use of pulsed-field ablation (PFA) is a significant consideration for achieving durable isolation in these procedures. This strategy directly addresses the clinical challenge of recurrent atrial fibrillation by targeting both pulmonary veins and the posterior wall. The comparison of these two ablation strategies provides insights into optimizing outcomes in repeat atrial fibrillation interventions. Article 2: Comparison of combined anatomic and functional modeling with purely anatomic assessment in scar-dependent ventricular tachycardia. Journal: Heart rhythm PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41513062 Summary: Identifying the critical substrate in scar-dependent ventricular tachycardia (VT) relies on precise mapping for ablation targets. Cardiac magnetic resonance imaging (M. R. I.) provides anatomic assessment (A. A.) to detect channels sustaining ventricular tachycardia. A refined approach involves heart digital twins, which integrate anatomic data with functional assessment for identifying the ventricular tachycardia isthmus. This combined anatomic and functional modeling offers a comprehensive method for characterizing the arrhythmogenic substrate compared to solely anatomic evaluations. Article 3: Senolytic reduction of senescent cells mitigates atrial arrhythmia vulnerability in aging rabbits. Journal: Heart rhythm PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41513056 Summary: The study found that senolytic reduction of senescent cells effectively mitigated atrial arrhythmia vulnerability in aging rabbits. Cellular senescence contributes to age-related atrial fibrillation pathogenesis through its senescence-associated secretory phenotype, releasing proinflammatory and profibrotic factors. This research demonstrates a novel therapeutic strategy for age-related atrial arrhythmias by specifically targeting and reducing senescent cells. These findings indicate a direct link between cellular senescence and atrial fibrillation susceptibility in aging hearts. Article 4: Real-world performance of intrinsic antitachycardia pacing: Primary results from a global prospective postapproval registry study. Journal: Heart rhythm PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41500490 Summary: Intrinsic antitachycardia pacing (iATP) represents a closed-loop algorithm capable of automatically designing and adjusting antitachycardia pacing therapy in real time. This technology effectively prevents defibrillator shocks and associated adverse outcomes, particularly in cases of rapid monomorphic ventricular tachycardia. Real-world performance data demonstrated the operational capability of iATP in a large, global patient cohort equipped with iATP-enabled implantable cardioverter-defibrillators. This confirms iATP’s role in enhancing arrhythmia management by dynamically tailoring therapy. Article 5: Purkinje and septal substrate modification as a therapeutic option for patients with STEMI and refractory ventricular fibrillation. Journal: Heart rhythm PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41443487 Summary: The study described Purkinje and septal substrate modification using radiofrequency catheter ablation (R. F. C. A.) as a therapeutic option. This approach targets therapy-refractory ventricular fibrillation (V. F.) in patients after successful percutaneous coronary intervention (P. C. I.) for S. T.-el

Welcome to Cardiology Today – Recorded April 04, 2026. This episode summarizes 5 key cardiology studies on topics like Acetazolamide and Implantable Loop Recorders. Key takeaway: Bradyarrhythmias Reveal Stroke’s Atrial Link. Article Links: Article 1: Interhospital Transfer for Heart Failure in the United States: A Patient and Hospital-level Analysis from GWTG-HF. (Journal of cardiac failure) Article 2: Cardiac rehabilitation after transcatheter aortic valve implantation before, during and after the COVID-19 pandemic: a whole-population study. (Heart (British Cardiac Society)) Article 3: Acetazolamide Effects on Natriuresis and Diuresis in Acute Heart Failure Treated with Furosemide and SGLT2i (SANDI). (ESC heart failure) Article 4: Paced QRS Morphology and Lead Location in Left Bundle Branch Area Pacing Assessed by Photon-Counting Cardiac Computed Tomography. (Heart rhythm) Article 5: Prevalence of clinically significant bradyarrhythmias in patients implanted with loop recorders for cryptogenic stroke: A manifestation of atrial cardiomyopathy? (Heart rhythm) Full episode page: https://podcast.explainheart.com/podcast/bradyarrhythmias-reveal-strokes-atrial-link-04-04-26/ Featured Articles Article 1: Interhospital Transfer for Heart Failure in the United States: A Patient and Hospital-level Analysis from GWTG-HF. Journal: Journal of cardiac failure PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41932644 Summary: This study characterized patients with Heart Failure who underwent interhospital transfer, establishing their demographic and clinical profiles. It found significant variations in the utilization of interhospital transfer among different hospitals across the United States. The data revealed distinctions in outcomes between transferred and non-transferred Heart Failure patients. This analysis provided foundational understanding of interhospital transfer patterns in this patient population. Article 2: Cardiac rehabilitation after transcatheter aortic valve implantation before, during and after the COVID-19 pandemic: a whole-population study. Journal: Heart (British Cardiac Society) PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41932822 Summary: This whole-population study established patterns of cardiac rehabilitation participation following Transcatheter Aortic Valve Implantation across England. It found variations in participation rates before, during, and after the C. O. V. I. D. minus 19 pandemic. The research demonstrated a specific association between cardiac rehabilitation participation and the primary outcome of unplanned all-cause rehospitalization. This analysis provided critical evidence regarding cardiac rehabilitation’s impact on clinical outcomes in this patient group. Article 3: Acetazolamide Effects on Natriuresis and Diuresis in Acute Heart Failure Treated with Furosemide and SGLT2i (SANDI). Journal: ESC heart failure PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41920937 Summary: The S. A. N. D. I. study investigated the natriuretic and diuretic effects of acetazolamide in patients with acute Heart Failure receiving intravenous furosemide and concomitant Sodium-Glucose Cotransporter-two Inhibitors. It found that acetazolamide provided significant natriuretic and diuretic benefits in this specific patient population, demonstrating enhanced decongestion. This research established the efficacy of adjunctive acetazolamide in acute Heart Failure patients who are also on Sodium-Glucose Cotransporter-two Inhibitors, addressing a previously unknown therapeutic gap. Article 4: Paced QRS Morphology and Lead Location in Left Bundle Branch Area Pacing Assessed by Photon-Counting Cardiac Computed Tomography. Journal: Heart rhythm PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41932670 Summary: This study elucidated the relationship between intra-septal lead position in Left Bundle Branch Area Pacing and paced QRS morphology. It found that ultra-high-resolution Photon-Counting Computed Tomography precisely evaluated lead-tip location in 20 patients, differentiating between Left Bundle Branch Pacing, Left Ventricular Septal Pacing, and Deep Septal Pacing. The data established specific distances and spatial orientations of pacing leads within the septum, directly informing optimal lead placement strategies for physiological pacing. Article 5: Prevalence of clinically significant bradyarrhythmias in patients implanted with loop recorders for cryptogenic stroke: A manifestation of atrial cardiomyopathy? Journal: Heart rhythm PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41519354 Summary: It found a notable burden of bradyarrhythmias in these patients compared with a matched control group. The data demonstrated that clinically significant bradyarrhythmias are a significant finding in this population, suggesting a potential manifestation of underlying atrial cardiomyopathy beyond Atrial Fibrillation detection. Transcript Today’s date is April 04, 2026. Welcome to Cardiology Today. Here are the

Welcome to Cardiology Today – Recorded April 03, 2026. This episode summarizes 5 key cardiology studies on topics like incident hypertension and quadruple guideline-directed medical therapies. Key takeaway: Glucagon-like Peptide-1 Agonists Cut Events Beyond Diabetes. Article Links: Article 1: Glucagon-like peptide-1 receptor agonists reduce experimental atherosclerosis progression, inflammatory biomarkers and cardiovascular events, irrespective of hyperglycaemia and obesity. (European heart journal) Article 2: Ten-minute asystolic warm ischemic time (AWIT) predicts mortality and severe primary graft dysfunction in donation after circulatory death hearts recovered with thoracoabdominal normothermic regional perfusion. (The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation) Article 3: Time to Quadruple Therapy After Initial Diagnosis of Heart Failure With Reduced Ejection Fraction. (JAMA cardiology) Article 4: Blood Pressure Genetic Risk and Incident Hypertension at 2 to 7 Years Post Partum. (JAMA cardiology) Article 5: Effect of Sildenafil on Platelet Activation and Mediators of Vascular Remodeling During LVAD Support. (ESC heart failure) Full episode page: https://podcast.explainheart.com/podcast/glucagon-like-peptide-1-agonists-cut-events-beyond-diabetes-04-03-26/ Featured Articles Article 1: Glucagon-like peptide-1 receptor agonists reduce experimental atherosclerosis progression, inflammatory biomarkers and cardiovascular events, irrespective of hyperglycaemia and obesity. Journal: European heart journal PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41926331 Summary: Glucagon-like peptide-1 receptor agonists (G. L. P. minus 1 R. A.s) significantly reduced atherosclerosis burden and inflammatory biomarkers in experimental rabbit models. In clinical subjects, these agents decreased inflammatory biomarkers and major adverse cardiovascular events (MACE). These beneficial cardiovascular effects were observed irrespective of the patients’ glycemic status or obesity, indicating a direct cardiovascular protective mechanism. Article 2: Ten-minute asystolic warm ischemic time (AWIT) predicts mortality and severe primary graft dysfunction in donation after circulatory death hearts recovered with thoracoabdominal normothermic regional perfusion. Journal: The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation PubMed Link: https://pubmed.ncbi.nlm.nih.gov/40701206 Summary: A ten-minute asystolic warm ischemic time (A. W. I. T.) during donation after circulatory death (D. C. D.) heart recovery significantly predicted increased mortality in adult heart transplant recipients. This prolonged warm ischemic time was also associated with severe primary graft dysfunction. These findings specifically apply to cardiac allografts recovered using thoracoabdominal normothermic regional perfusion (N. R. P.). Article 3: Time to Quadruple Therapy After Initial Diagnosis of Heart Failure With Reduced Ejection Fraction. Journal: JAMA cardiology PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41920552 Summary: The study characterized the time to quadruple guideline-directed medical therapies (G. D. M. T.s) following an initial diagnosis of heart failure with reduced ejection fraction (H. F. rEF). It identified specific factors associated with achieving timely initiation of these therapies in a large cohort of patients. The findings provide contemporary estimates on the duration and facilitators of initiating optimal quadruple therapy for patients with H. F. rEF. Article 4: Blood Pressure Genetic Risk and Incident Hypertension at 2 to 7 Years Post Partum. Journal: JAMA cardiology PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41920533 Summary: The study found that genetic risk for high systolic blood pressure (S. B. P.) significantly stratified the risk of new-onset hypertension in women. This association was observed at two to seven years post partum. The genetic risk was an independent predictor, separate from women’s clinical characteristics and history of hypertensive disorders of pregnancy (H. D. P.), including preeclampsia, eclampsia, and gestational hypertension. Article 5: Effect of Sildenafil on Platelet Activation and Mediators of Vascular Remodeling During LVAD Support. Journal: ESC heart failure PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41926705 Summary: V. A. D. Support. Observational studies revealed an association between phosphodiesterase-5 inhibitors, specifically sildenafil, and lower mortality and ischemic stroke in patients undergoing durable left ventricular assist device (L. V. A. D.) support. This study conducted a double-blind, randomized, placebo-controlled investigation into sildenafil’s causal effects on platelet activation and circulating mediators of vascular remodeling. This research aims to understand the direct physiological impact of sildenafil th

Welcome to Cardiology Today – Recorded April 02, 2026. This episode summarizes 5 key cardiology studies on topics like atrial fibrillation ablation and immature neutrophils. Key takeaway: Hypothermic Preservation Boosts Heart Transplant Survival. Article Links: Article 1: Heart failure with reduced ejection fraction in Sweden: patient adherence and persistence to quadruple pharmacotherapy prescription. (European heart journal) Article 2: Stroke and systemic embolism following atrial fibrillation ablation: the EMBOL-AF Global Registry. (European heart journal) Article 3: Immature neutrophils are elevated in human PGD and linked to G-CSF-driven injury in a murine model of lung ischemia-reperfusion. (The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation) Article 4: Impact of HeartMate 3 left ventricular assist device infection on outcomes following heart transplant. (The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation) Article 5: Improved 2-year heart transplant survival with moderate hypothermic donor heart preservation in the GUARDIAN heart registry. (The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation) Full episode page: https://podcast.explainheart.com/podcast/hypothermic-preservation-boosts-heart-transplant-survival-04-02-26/ Featured Articles Article 1: Heart failure with reduced ejection fraction in Sweden: patient adherence and persistence to quadruple pharmacotherapy prescription. Journal: European heart journal PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41920862 Summary: The Swedish Heart Failure Registry enabled a detailed assessment of patient adherence and persistence to quadruple pharmacotherapy for heart failure with reduced ejection fraction. This assessment confirmed the critical importance of patient adherence for the real-world uptake of these treatments. The study found specific associations between medication adherence and subsequent patient morbidity and mortality outcomes. Article 2: Stroke and systemic embolism following atrial fibrillation ablation: the EMBOL-AF Global Registry. Journal: European heart journal PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41914181 Summary: The E. M. B. O. L. minus A. F. Global Registry provided comprehensive data defining the incidence, outcomes, and procedural associations of stroke and systemic embolism following atrial fibrillation and left atrial flutter catheter ablation. This retrospective global registry captured detailed information from ablation centers worldwide, clarifying these previously poorly characterized complications. The registry’s findings illuminate critical insights into these post-ablation complications. Article 3: Immature neutrophils are elevated in human PGD and linked to G-CSF-driven injury in a murine model of lung ischemia-reperfusion. Journal: The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41338428 Summary: This study found that immature neutrophils are elevated in human primary graft dysfunction. Researchers demonstrated a direct link between these immature neutrophils and granulocyte colony stimulating factor-driven injury in a murine model of lung ischemia-reperfusion. These findings indicate that immature neutrophils increase following lung transplantation and contribute to primary graft dysfunction severity. Article 4: Impact of HeartMate 3 left ventricular assist device infection on outcomes following heart transplant. Journal: The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41241030 Summary: This study found that infectious complications are common in patients implanted with HeartMate 3 left ventricular assist devices. The analysis specifically identified the impact of HeartMate 3 left ventricular assist device associated infection on outcomes following heart transplant. Researchers clarified crucial post-transplant outcomes by reviewing 115 patients with a HeartMate 3 device who underwent heart transplantation at Duke University Hospital. Article 5: Improved 2-year heart transplant survival with moderate hypothermic donor heart preservation in the GUARDIAN heart registry. Journal: The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation PubMed Link: https://pubmed.ncbi.nlm.nih.gov/41241029 Summary: Data from the G. U. A. R. D. I. A. N. Heart Registry demonstrated improved two year heart transplant survival when using moderate hypothermic donor heart preservation. The Paragonix SherpaPak Cardiac Transport System, a method of static preservation, showed superior outcomes c