A simple method for the study of the WPW syndrome, which can be performed at the patient's bedside, is presented. Using standard ECG, vagal maneouvers, ajmaline test, precordial mapping, vectorcardiography, electrode catheters positioned in the right atrium and esophageal catheters, the site of accessory pathways, and the complex arrhythmias occurring in these patients can be understood and medically treated.
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