QT prolongation
Heart rhythm abnormality
QT prolongation is a heart rhythm abnormality where the electrical system takes longer than normal to recharge between beats, as measured on an electrocardiogram.
The QT interval represents the time from ventricular contraction to recovery.
When prolonged, it increases the risk of dangerous arrhythmias and sudden cardiac death.
Certain medications, electrolyte imbalances, and genetic conditions can cause it: The drug was withdrawn due to QT prolongation risk.
- torsades de pointesPolymorphic ventricular tachycardia variant
- arrhythmiaAbnormal cardiac rhythm
- long QT syndromeDelayed cardiac repolarization disorder
- beta-blockersHeart rate reducers
- antipsychoticsDrugs treating severe mental disorders
electrocardiogram · bradycardia · syncope · haloperidol · ventricular fibrillation · antidepressants · palpitations · diuretics · genetic predisposition · antibiotics · antihistamines · opioids · fainting · ventricular · ECG · genetic counseling · interval · magnesium
- drug reactionsadverse reaction, adverse reactions, side effects, drug allergy, allergic reaction
- Drug Risksadverse reactions, side effects, drug interactions, overdose, toxicity
- pharmacologypharmacology, drugs, pharmacokinetics, dose, drug
- arrhythmiasatrial fibrillation, A-fib, afib, arrhythmia, ventricular fibrillation
- cardiotoxicityarrhythmia, arrhythmias, heart failure, cardiomyopathy, myocarditis
- deficiency symptomsscurvy, beriberi, pellagra, anemia, goiter