Radiofrequency catheter ablation
Posted by: Johnson Francis on: 20 Sep, 2009
Which of the following tachycardias are not amenable to radiofrequency catheter ablation:
a. Atrioventricular reentrant tachycardia
b. Belhassen’s tachycardia
c. Atrioventricular nodal reentrant tachycardia
d. Torsades de pointes
Answer: d
Torsades de pointes is a polymorphic ventricular tachycardia, with no specific focus of origin which can be ablated. Since it is associated with QT prolongation, measures to reduce the QT interval will suppress the arrhythmia. Magnesium infusion, correction of hypokalemia, isoprenaline infusion, overdrive pacing and treatment of ischemia are the useful measures.
Tags: Atrioventricular nodal reentrant tachycardia, Atrioventricular reentrant tachycardia, Belhassen’s tachycardia, correction of hypokalemia, isoprenaline infusion, Magnesium infusion, measures to reduce the QT interval will suppress the arrhythmia, no specific focus of origin, overdrive pacing, Torsades de pointes, Torsades de pointes is a polymorphic ventricular tachycardia, treatment of ischemia, Which of the following tachycardias are not amenable to radiofrequency catheter ablation:
