Abstract
Torsade de pointes is an uncommon and malignant form of polymorphic ventricular tachycardia and associated with a prolonged QT interval, which may be congenital or acquired. Complete atrioventricular block may cause QT interval prolongation and torsade de pointes. In this paper, we present a case with complete atrioventricular block complicated with frequent episodes of torsade de pointes triggered by early premature ventricular contractions despite normal QT intervals.
Highlights
Syncope is a frequent symptom in patients with complete atrioventricular block (CAVB) [1]
Reported a case with CAVB complicated with frequent episodes of torsade de pointes (TdP) triggered by early premature ventricular contractions (PVCs) despite normal QT intervals
The term TdP refers to a ventricular tachycardia (VT) characterized by QRS complexes of changing amplitude that appear to twist around the isoelectric line and occur at rates of 200 to 250/min
Summary
Syncope is a frequent symptom in patients with complete atrioventricular block (CAVB) [1]. In the majority of cases, low cardiac output caused by decreased heart rate is responsible for the symptoms. In some cases bradycardia associated QT prolongation may lead to malign ventricular tachyarrhythmias causing syncope [1, 2]. Reported a case with CAVB complicated with frequent episodes of torsade de pointes (TdP) triggered by early premature ventricular contractions (PVCs) despite normal QT intervals
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