Cardiovascular
Long QT Syndrome
Heart-rhythm disorder that can cause fainting or sudden arrhythmia.
Overview
Heart-rhythm disorder that can cause fainting or sudden arrhythmia.
Also known as: lqts, long qt, qt prolongation
In-depth guidance
A structured clinical overview of Long QT Syndrome — symptoms, red flags, causes, and care pathways — is being prepared by our clinical reviewers. In the meantime:
⚠ When to seek urgent care
Sudden severe symptoms, breathing difficulty, chest pain, confusion, fainting, severe bleeding, or any rapidly worsening illness need urgent assessment. Call your local emergency number.