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
29 clinical trials for this condition and its sub-types, 22 tagged with Long QT syndrome itself.
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Sub-types of Long QT syndrome
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Familial long QT syndrome 1 trial · 11 incl. sub-types
19 sub-types
- Long QT syndrome 3 6 trials
- Long QT syndrome 2 3 trials
- Jervell and Lange-Nielsen syndrome 2 trials Sub-types →
- Timothy syndrome 1 trial Sub-types →
- Long QT syndrome 1 1 trial
- Long QT syndrome 5 0 trials · 1 incl. sub-types Sub-types →
- Andersen-Tawil syndrome 0 trials
- Cardiac arrhythmia, ankyrin-B-related 0 trials
- Long QT syndrome 10 0 trials
- Long QT syndrome 11 0 trials
- Long QT syndrome 12 0 trials
- Long QT syndrome 13 0 trials
- Long QT syndrome 14 0 trials
- Long QT syndrome 15 0 trials
- Long QT syndrome 16 0 trials
- Long QT syndrome 4 0 trials
- Long QT syndrome 6 0 trials
- Long QT syndrome 8 0 trials
- Long QT syndrome 9 0 trials
Most studied deeper sub-types
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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 By invitation onlyThis 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 By invitation onlyThis 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 By invitation onlyThis 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…
Sponsor: Helsinki University Central Hospital • Aim: Knowledge-focused
Last updated Jun 27, 2026 07:57 UTC