Abstract
The effect of short-term intravenous administration of procainamide (12 patients), propranolol (4 patients) and verapamil (4 patients) was studied in 12 patients with chronic recurrent sustained ventricular tachycardia. In all patients tachycardia could reproducibly be initiated and terminated with programmed electrical stimulation of the heart. Procainamide (1) lengthened the effective refractory period of the right ventricle, (2) affected the tachycardia zone, (3) reduced ventricular rate during tachycardia, and (4) lengthened the interval between the tachycardia-initiating premature ventricular beat and the first QRS complex of tachycardia. No effect on the refractory period of the right ventricle or the mechanism of tachycardia was seen after administration of propranolol or verapamil. Apart from their therapeutic implications these data suggest that it may be possible to use drugs to study mechanisms of ventricular tachycardia in the human heart.
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Wellens, H.J.J., Bär, F.W.H.M., Lie, K.I., Düren, D.R., Dohmen, H.J. (2000). Effect of procainamide, propranolol and verapamil on mechanism of tachycardia in patients with chronic recurrent ventricular tachycardia. In: Smeets, J.L.R.M., Doevendans, P.A., Josephson, M.E., Kirchhof, C., Vos, M.A. (eds) Professor Hein J.J. Wellens. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4110-9_16
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DOI: https://doi.org/10.1007/978-94-011-4110-9_16
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