A ventricular tachyarrhythmia that can be induced by certain antipsychotic and antidepressant medications.
A rapid and unstable type of ventricular tachy cardia characterized by shifts in the QRS complex in a manner that appears to shift or twist.
A rapid, unstable form of ventricular tachycardia in which the QRS complexes appear to twist, or shift, electrical orientation around the isoelectric line of the electrocardiogram. It often occurs as a life-threatening effect of a medication (e.g., quinidine, amiodarone, or a tricyclic antidepressant) that prolongs the Q-T interval but may also complicate congenital long Q-T syndromes. Intravenous magnesium sulfate may be used to treat this arrhythmia.