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Long QT syndrome
MONDO:0002442A condition that is characterized by episodes of fainting (syncope) and varying degree of ventricular arrhythmia as indicated by the prolonged QT interval. The inherited forms are caused by mutation of genes encoding cardiac ion channel proteins. The two major forms are Romano-Ward syndrome (also known as long QT syndrome 1) and Jervell-Lange Nielsen syndrome.
Also known as: long QT syndrome, ventricular arrhythmia associated with long QT syndrome
25 clinical trials for this condition and its sub-types.
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Broader categories
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Newborn screening study aims to catch rare diseases at birth
Diagnosis OngoingThis study offers voluntary screening for newborns in North Carolina to detect a wide range of rare health conditions early. Using a small blood sample already collected at birth, the program tests for dozens of disorders, including spinal muscular atrophy, cystic fibrosis, and m…
Sponsor: RTI International • Aim: Diagnosis
Last updated Jul 03, 2026 00:00 UTC
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Watching embryos grow: a new way to pick the best for IVF?
Knowledge-focused ENROLLING_BY_INVITATIONThis study watches embryos grow using time-lapse cameras and compares their development to genetic test results. Researchers hope to find visual clues that indicate a healthy embryo. 2000 IVF patients are taking part. If a link is found, it could lead to a less invasive way to ch…
Sponsor: Gattaca Genomics • Aim: Knowledge-focused
Last updated Jun 27, 2026 09:00 UTC
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Scientists build heart cells in a dish to unravel genetic heart disease
Knowledge-focused ENROLLING_BY_INVITATIONThis study collects blood or skin samples from 100 adults with inherited heart rhythm disorders (like Long QT Syndrome or Brugada Syndrome) and healthy volunteers. Researchers will turn these samples into stem cells and then into heart cells to study how these diseases work and t…
Sponsor: Johns Hopkins University • Aim: Knowledge-focused
Last updated Jun 27, 2026 08:11 UTC
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Do heart meds cause low blood sugar in kids? new study investigates
Knowledge-focused ENROLLING_BY_INVITATIONThis observational study looks at how often low blood sugar (hypoglycemia) occurs in children under 7 with Long QT syndrome who take the beta-blocker propranolol. Researchers will use a continuous glucose monitor for 10 days during healthy times and during an infection. They will…
Phase: NA • Sponsor: Helsinki University Central Hospital • Aim: Knowledge-focused
Last updated Jun 27, 2026 07:57 UTC