Abstract
In this case, electrophysiology and histology could be studied in the same heart. Clinical investigation, clinical electrophysiology, and postmortem serial histological sections of the septum were analyzed. A patient with repeated seizures and a short PR interval with narrow QRS complex underwent electrophysiologic studies. The patient died while experiencing a very rapid supraventricular tachycardia and histologic examination showed a atrio-hisian bypass tract. In our study, the lack of lengthening of the PR interval in spite of progressively premature atrial stimulation connected with the presence of atrio-hisian bypass tract.
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