Key result
Electrophysiological studies demonstrated that bidirectional tachycardia originated in the left ventricle, with an interectopic interval of 440-470 msec, and was suppressed by lidocaine.
Case Report (n=1)
Bidirectional tachycardia can originate in the left ventricle in the absence of digitalis intoxication or structural heart disease.
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May warrant LV origin consideration in idiopathic bidirectional tachycardia; single case leaves mechanism and management open.
Kastor et al. (1973) conducted a case report in Bidirectional tachycardia (n=1). Electrophysiological, hemodynamic and angiographic studies was evaluated on Origin and characteristics of bidirectional tachycardia. Electrophysiological studies demonstrated that bidirectional tachycardia originated in the left ventricle, with an interectopic interval of 440-470 msec, and was suppressed by lidocaine.
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