Arrhythmias, cardiac

This trial tests whether using cryoballoon ablation as the first treatment for persistent atrial fibrillation (AF) is more effective and safer than starting with anti-arrhythmic drugs. Adults aged 18-75 with symptomatic persistent AF and a structurally normal heart are eligible. …

This trial tests a special implantable cardioverter-defibrillator (ICD) that uses a single lead to sense both heart chambers, aiming to detect atrial fibrillation and other arrhythmias early. It includes 56 people who need a single-chamber ICD and are in normal sinus rhythm at th…

Researchers are testing whether a new arm-worn heart monitor called the HeartWatch can record heart rhythms as well as the Holter and event recorders used in clinics. Adults who have been recommended for a heart monitor wear the HeartWatch on the upper left arm at the same time a…

This study tested whether a special algorithm in a pacemaker can accurately diagnose sleep apnea in people with heart problems. Researchers compared the pacemaker's readings to a standard overnight sleep test in 66 participants. They also looked for a link between sleep apnea sev…

This completed study looked at how rising temperatures affect people with chronic conditions like heart disease, diabetes, and depression. Researchers in Germany and Italy surveyed 176 patients to see what symptoms they experienced during heat and what protective steps they took.…

This study looked at whether a special mapping tool called vMap can help doctors perform heart ablations more efficiently for people with irregular heartbeats (arrhythmias). Researchers tracked 112 patients to see if using vMap reduced procedure time and improved success rates. T…

This study followed 268 adults with end-stage kidney disease on dialysis. Each participant wore a Holter heart monitor for 7 days to track irregular heartbeats. Researchers then looked for links between those heart patterns and serious outcomes like sudden cardiac death, heart at…

This completed pilot study looked at how moderate exercise affects heart function and dangerous heart rhythms in 20 adults with arrhythmogenic cardiomyopathy (ACM). Participants did different types of exercise while doctors measured heart pressures and electrical activity. The go…