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In this multicenter trial involving patients with paroxysmal atrial fibrillation who had not previously received rhythm-control treatment, cryoballoon ablation resulted in a significantly higher percentage of patients with treatment success at 1 year than antiarrhythmic drug therapy, with a low incidence of procedure-related adverse events.

Initial treatment of paroxysmal atrial fibrillation with cryoballoon ablation was associated with a lower incidence of persistent atrial fibrillation and other atrial tachyarrhythmias over 3 years than rhythm-control medications.

Arrhythmias and major adverse cardiac events remain significant complications following ST-segment elevation myocardial infarction (STEMI). Shenfu injection, a traditional Chinese medicine formulation, has shown cardioprotective effects in preclinical studies. This trial is aimed at investigating whether Shenfu injection as an adjunctive therapy to standard treatment could reduce arrhythmias and improve clinical outcomes in patients with STEMI undergoing percutaneous coronary intervention (PCI). A single-center, prospective, randomized, controlled trial was conducted at Shanghai Ninth People's Hospital among 245 patients with STEMI undergoing PCI. Participants were randomized to receive either standard therapy plus Shenfu injection (50 mL, administered intravenously twice daily for five consecutive days) ( = 123) or standard therapy alone ( = 122). The primary endpoint was the incidence of in-hospital arrhythmias. Secondary endpoints included major adverse cardiac events (MACEs) during the 12-month follow-up period and cardiac magnetic resonance imaging parameters. A total of 245 patients underwent randomization (123 assigned to Shenfu injection group and 122 assigned to control group). During hospitalization, patients assigned to Shenfu injection had a significantly lower incidence of arrhythmias compared with the control group (24.4% vs. 38.5%, = 0.017), with the most pronounced effect on frequent ventricular premature contractions (7.3% vs. 15.5%, = 0.042). After adjustment for key baseline covariates including age, coronary artery disease extent, myocardial injury markers (CK-MB max and TNI max), left ventricular ejection fraction, B-type natriuretic peptide, door-to-balloon time, hypertension, and diabetes mellitus, Shenfu injection remained independently associated with reduced risk of in-hospital arrhythmias (adjusted OR 0.454, 95% CI: 0.249-0.827, = 0.010). Cardiac magnetic resonance imaging performed in 174 patients revealed significantly smaller infarct size (16.1 ± 9.1 vs. 20.8 ± 13.1 g, = 0.007) and lower incidence of microvascular obstruction (45.0% vs. 65.0%, = 0.008) in the Shenfu group, with both parameters showing significant positive correlations with arrhythmia occurrence. During the 12-month follow-up, patients receiving Shenfu injection had a higher event-free rate from MACEs compared with the control group (12-month Kaplan-Meier event-free rate estimates, 84.6% vs. 73.0%, respectively; = 0.028). Treatment with Shenfu injection as an adjunctive therapy to standard treatment in patients with STEMI undergoing PCI significantly reduced in-hospital arrhythmias, infarct size, microvascular obstruction, and major adverse cardiac events during a 12-month follow-up period. The independent effect on arrhythmias after comprehensive statistical adjustment and the demonstrated correlation between reduced myocardial damage and arrhythmia prevention suggest the potential therapeutic value of Shenfu injection in improving both short-term and long-term outcomes in STEMI patients. Chinese Clinical Trial Registry Identifier: ChiCTR2200066918.

Patients with symptomatic, paroxysmal, untreated atrial fibrillation were randomly assigned to antiarrhythmic drug therapy or cryoablation. At 1 year, there was a significantly lower rate of recurrence of atrial fibrillation with cryoablation than with drug therapy.

In this multicenter, randomized trial comparing early rhythm control with usual care in patients with early atrial fibrillation and cardiovascular conditions, early rhythm control reduced the rate of death from cardiovascular causes and cardiovascular complications and did not affect the number of nights in the hospital.

Patients with permanent atrial fibrillation and additional cardiac risk factors were randomly assigned to receive either dronedarone or placebo. At a median of 3.5 months, the risk of major adverse cardiovascular events was significantly increased with dronedarone. Dronedarone is a new antiarrhythmic agent that is used to restore sinus rhythm and to reduce rates of hospitalization for cardiovascular causes in patients with intermittent (paroxysmal or persistent) atrial fibrillation. 1 In ATHENA (A Placebo-Controlled, Double-Blind, Parallel Arm Trial to Assess the Efficacy of Dronedarone 400 mg bid for the Prevention of Cardiovascular Hospitalization or Death from any Cause in Patients with Atrial Fibrillation/Atrial Flutter; ClinicalTrials.gov number, NCT00174785), 4628 patients with intermittent atrial fibrillation were randomly assigned to receive either dronedarone or placebo. Dronedarone reduced the incidence of the primary outcome of unplanned hospitalization for cardiovascular causes or death. Significant . . .

In patients with ischemic cardiomyopathy and an implantable cardioverter–defibrillator who had ventricular tachycardia, catheter ablation was associated with a lower rate of death, ventricular tachycardia storm, or ICD shock at 28 months than an escalation in antiarrhythmic drugs. Ventricular tachycardia caused by the scarring that occurs after myocardial infarction carries a substantial risk of death, a risk that is significantly reduced by the placement of an implantable cardioverter–defibrillator (ICD). 1 ICDs are implanted in more than 100,000 patients annually in the United States. Of these patients, 15% are initially treated with concomitant antiarrhythmic drug (AAD) therapy, 2 and up to 38% receive an appropriate shock for ventricular arrhythmia within 5 years. 3 ICDs effectively terminate ventricular tachycardia, but recurrent arrhythmias and ICD shocks may cause impairment in the quality of life, 4 are associated with an increased risk of death, heart failure, . . .

Patients with ventricular tachycardia and ischemic cardiomyopathy are at high risk for adverse outcomes. Catheter ablation is commonly used when antiarrhythmic drugs do not suppress ventricular tachycardia. Whether catheter ablation is more effective than antiarrhythmic drugs as a first-line therapy in patients with ventricular tachycardia is uncertain. In an international trial, we randomly assigned in a 1:1 ratio patients with previous myocardial infarction and clinically significant ventricular tachycardia (defined as ventricular tachycardia storm, receipt of appropriate implantable cardioverter-defibrillator [ICD] shock or antitachycardia pacing, or sustained ventricular tachycardia terminated by emergency treatment) to receive antiarrhythmic drug therapy or to undergo catheter ablation. All the patients had an ICD. Catheter ablation was performed within 14 days after randomization; sotalol or amiodarone was administered as antiarrhythmic drug therapy according to prespecified criteria. The primary end point was a composite of death from any cause during follow-up or, more than 14 days after randomization, ventricular tachycardia storm, appropriate ICD shock, or sustained ventricular tachycardia treated by medical intervention. A total of 416 patients were followed for a median of 4.3 years. A primary end-point event occurred in 103 of 203 patients (50.7%) assigned to catheter ablation and in 129 of 213 (60.6%) assigned to drug therapy (hazard ratio, 0.75; 95% confidence interval, 0.58 to 0.97; P = 0.03). Among patients in the catheter ablation group, adverse events within 30 days after the procedure included death in 2 patients (1.0%) and nonfatal adverse events in 23 patients (11.3%). Among the patients assigned to drug therapy, adverse events that were attributed to antiarrhythmic drug treatment included death from pulmonary toxic effects in 1 patient (0.5%) and nonfatal adverse events in 46 patients (21.6%). Among patients with ischemic cardiomyopathy and ventricular tachycardia, an initial strategy of catheter ablation led to a lower risk of a composite primary end-point event than antiarrhythmic drug therapy. (Funded by the Canadian Institutes of Health Research and others; VANISH2 ClinicalTrials.gov number, NCT02830360.).

In patients with atrial high-rate episodes, edoxaban did not significantly reduce the incidence of stroke and cardiovascular outcomes as compared with placebo, but it led to a higher incidence of bleeding.