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[Multiform ventricular tachycardias and Torsades de Pointe]
Giornale Italiano Di Cardiologia
|January 1, 1983
Summary
Torsade de Pointes (T.d.P.) is a ventricular tachyarrhythmia with twisting QRS complexes, often linked to a prolonged Q-T interval. Differentiating T.d.P. from multiform ventricular tachycardia (M.V.T.) is crucial for appropriate patient management.
Area of Science:
- Cardiology
- Electrophysiology
- Medical Science
Context:
- Torsade de Pointes (T.d.P.), a specific ventricular tachyarrhythmia, was described by Dessertenne in 1966.
- Characterized by rapid ventricular tachycardia (V.T.) with a unique QRS morphology of alternating polarity, T.d.P. typically occurs with a prolonged Q-T interval.
Purpose:
- To differentiate Torsade de Pointes (T.d.P.) from multiform ventricular tachycardia (M.V.T.) based on Q-T interval duration.
- To discuss the electrocardiographic, clinical, etiological, and electrogenetic features of both T.d.P. and M.V.T.
Summary:
- T.d.P. presents with paroxysmal V.T. (>200 bpm) and twisting QRS complexes, often triggered by premature ventricular beats during a prolonged Q-T interval.
- While T.d.P. requires avoidance of drugs prolonging repolarization, M.V.T. (normal Q-T) typically responds to conventional therapy, including Class I antiarrhythmics.
Impact:
- Distinguishing between T.d.P. and M.V.T. has significant therapeutic implications, guiding treatment strategies and drug selection.
- This distinction is vital for preventing drug-induced arrhythmias and ensuring effective management of ventricular tachyarrhythmias.