[Latent Wolff-Parkinson-White syndrome as the electrophysiological and morphological basis of supraventricular tachycardia].

The concealed Wolff-Parkinson-White (WPW) syndrome, the electrophysiologic and morphologic basis of cardiac arrhythmias, was shown to be a cause of the attacks of supraventricular tachycardia. The latter is rooted in the concealed WPW syndrome in about 30% of patients showing no electrocardiographic signs of pre-excitation. Electrophysiologic criteria of the diagnosis of supraventricular tachycardias due to the concealed WPW syndrome are listed. Concealed Kent's bundle was most commonly found on the left side. As regards antiarrhythmic therapy, disopyramide is one of the most effective drugs for patients with supraventricular tachycardias due to the concealed WPW syndrome.