INTRODUCTION The aim of our study was to assess the effectiveness of the nonlinear analysis (NLA) of ECG in predicting the results of invasive electrophysiologic study (EPS) in patients with ventricular arrhythmias. METHODS We evaluated 25 patients with history of cardiac arrest, syncope, sustained, or nonsustained ventricular tachycardia (VT). All patients underwent electrophysiologic study ...

PURPOSE We studied the validity, usefulness, and relative cost to detect diabetic retinopathy (DR) and sight-threatening DR (STDR) by using a hand-held electrophysiologic tool compared to digital fundus photography. METHOD Patients with diabetes attending the screening unit of King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia were evaluated by "RETeval", Amsler grid, and digital dilat...

patients with recurrent paroxysmal tachycardia: a new method for developing successful oral antiarrhythmic therapy. In Reentrant Arrhythmias, edited by Kulbertus HE. Baltimore, University Park Press, 1976, p 294 30. Ruskin JN, DiMarco JP, Garan H: Out-of-hospital cardiac arrest: electrophysiologic observations and selection of longterm antiarrhythmic therapy. N Engi J Med 303: 607, 1980 31. Mye...

The MADIT-II trial showed that in patients with a prior myocardial infarction and ejection fraction </=0.30, prophylactic implantation of a defibrillator improves survival with a 31% reduction in mortality during an average follow-up of 20 months. Electrophysiologic inducibility was positive in 36% of patients at the time of ICD implantation. Inducibility was associated with increased ICD utili...

A 55 year old man with history of palpitation was referred for electrophysiologic study. Baseline ECG, physical examination and transthoracic echocardiographic study were normal. Electrophysiologic study revealed normal AH and HV intervals. Pacing of right atrium with a cycle length of 300 msec showed 2:1 AV block. AH interval was 252 msec and the block was infra-his (Figure 1). With continual ...