Long QT syndrome

This study tests whether the drug THRV-1268 can safely shorten the heart's electrical recovery time (QT interval) in people with Long QT Syndrome Type 2, a genetic condition that raises the risk of dangerous heart rhythms and sudden cardiac arrest. About 64 participants will take…

This trial tests whether a 4-electrode tablet-based ECG (DigitalCardio) can record heart activity as quickly and clearly as the standard 10-electrode ECG. About 50 cardiology patients will undergo both methods in random order. Researchers will measure recording time and compare t…

This study explores whether a quick, painless cheek swab can spot protein changes linked to inherited heart conditions that cause sudden cardiac death in young people. Researchers will collect samples from 26 patients with arrhythmic disorders or family members at risk. If the te…

This study is not testing a drug or treatment. Instead, researchers are using artificial intelligence to analyze electrocardiogram (ECG) data from over 127,000 people. The goal is to create computer models that can quickly and accurately predict life-threatening heart rhythm prob…

This study is testing whether a Fitbit can accurately measure heart electrical activity (QT interval) in 80 adults with Long QT Syndrome, a condition that can cause dangerous heart rhythms. Participants will use a Fitbit to take weekly ECG readings at home, which will be compared…

This study is building a registry of 1,211 people in Brazil who have inherited heart conditions like cardiomyopathy, arrhythmias, and Marfan syndrome. Researchers will collect DNA samples and medical information to discover which genes are most commonly affected and how often the…

This study looks at new guidelines for diagnosing and managing breath-holding spells in children under 5 in southern Sweden. Researchers want to see if the guidelines safely reduce the need for extra tests like ECGs and blood work. They will also check if iron supplements help le…

This study compares two methods of contacting family members for genetic testing after a person is found to have a gene linked to familial hypercholesterolemia or long QT syndrome. In one group, the study team directly contacts relatives; in the other, the person with the gene co…

This study is testing a new, non-invasive monitor (fetal magnetocardiography) to detect hidden heart problems in high-risk pregnancies that might lead to fetal death. Researchers will study 30 pregnant women with conditions like congenital heart disease or twin pregnancy. The goa…

This study looks at whether certain medications known to affect the heart's electrical activity (QT-prolonging drugs) actually cause major heart problems in hospitalized adults. Researchers will analyze data from over 990,000 patients across Ontario hospitals, comparing those who…

This study compares a continuous heart-monitoring patch with standard electrocardiograms (ECGs) in 60 adults receiving cancer drugs that can cause dangerous heart rhythm changes. The goal is to see if the patch detects problems more accurately and consistently. Participants will …

This study from Mayo Clinic looks for genetic heart conditions in people with epilepsy that might raise the risk of sudden unexpected death (SUDEP). Researchers will analyze DNA from 600 adults aged 18-50 with epilepsy or related symptoms, plus their blood relatives. The goal is …