Polymorphic ventricular tachycardia

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…

This study tested whether permanent pacemakers can be safely implanted using only ultrasound (transthoracic echocardiography) instead of traditional X-ray guidance. Thirty-one adults with arrhythmias who needed a pacemaker took part. The goal was to see if the procedure could be …

This study tested a new type of wire (lead) for implantable heart devices that deliver shocks to stop dangerous fast heart rhythms. Researchers checked how safe and effective the lead was in 998 people who needed a defibrillator or heart failure device. The lead was placed in a s…

This trial tests whether a wearable patch called MEMO Patch V2 can detect heart rhythm disorders (arrhythmias) more effectively than the standard 24-hour Holter monitor. Adults with symptoms like palpitations or dizziness, or those who have had a stroke of unknown cause, will wea…

This study investigates whether an Apple Watch can accurately detect heart rhythm problems (arrhythmias) in children aged 6 to 21 who are already scheduled for standard heart monitoring. Researchers will compare the watch's ECG and heart rate readings to those from conventional c…

This study tested a new non-invasive tool called ECG-Imaging that uses many electrodes on the body to create a 3D map of the heart's electrical activity. The goal was to see if it can more accurately locate the source of heart rhythm problems compared to a standard ECG. 362 parti…

This trial compares two standard local anesthetics given during pacemaker or defibrillator surgery: a mixture of lidocaine and bupivacaine versus lidocaine alone. Researchers want to see if the mixture reduces postoperative pain and the need for narcotic painkillers. About 350 pe…

This study looked at whether a 12-week virtual exercise program could help women with cardiac implantable electronic devices (CIEDs) improve their physical fitness, quality of life, and mental health. Twenty women took part, doing either high-intensity interval training (HIIT) or…

This study looks at children and adolescents aged 6 to 16 with inherited arrhythmias, such as long QT syndrome, to see if a controlled exercise test on a treadmill reflects their actual heart rate and activity levels during daily life. Participants will complete a routine exercis…

This study aims to establish national reference levels for radiation exposure during X-ray guided procedures to correct heart rhythm disorders, such as pacemaker insertions and ablations. Researchers will collect radiation dose data from over 4,000 adult patients undergoing these…

This study tests whether wearing a heart monitor for 14 days can detect dangerous heart rhythms in people with mitral valve prolapse (a common heart valve condition) better than the usual 24-hour test. About 60 adults with MVP will wear a patch monitor for two weeks. The goal is …

This study looks at how inherited heart rhythm problems (like Long QT Syndrome) and heart muscle diseases (like Hypertrophic Cardiomyopathy) affect the quality of life and physical activity of children aged 6 to 18. Researchers will compare 107 children with these conditions to 1…

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 completed registry study followed over 5,000 people with heart rhythm disorders who received Abbott devices during standard procedures. The goal was to collect real-world data on safety and how well the devices work. No new treatments were tested; instead, the study observed…

This completed study looked at how the heart medication amiodarone behaves in children aged 0 to 18 with heart rhythm disorders. Researchers took blood samples from 57 children to measure drug levels and understand how the body processes it. The goal was to find the best dose for…

This study used a special brain imaging technique called near-infrared spectroscopy to see how the brain responds to pain and sounds while people are under general anesthesia. 44 healthy volunteers aged 12-30 were given either a painkiller (remifentanil) or a placebo. The goal wa…