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Coronary artery revascularization in patients with sustained ventricular arrhythmias in the chronic phase of a myocardial infarction: effects on the electrophysiologic substrate and outcome

^a Arrhythmia Section, Cardiovascular Institute, Hospital Clinic, University of Barcelona, Barcelona, Spain

View larger version (25K): [in a new window]   Figure 1 Flow-chart relating clinical arrhythmia, results of pre- and post-revascularization electrophysiological studies (1st EPS and 2nd EPS) and follow-up (F-up). Death = death during surgery; NA = no arrhythmia recurrence during follow-up; NI = noninducible; SCD = sudden cardiac death during follow-up; VF = ventricular fibrillation; VT = ventricular tachycardia. Numbers indicate patients in each category.

View larger version (19K): [in a new window]   Figure 2 Kaplan-Meier analysis of freedom from recurrent arrhythmic events during follow-up according to the inducibility of ventricular arrhythmias after coronary artery revascularization. The difference between the groups was not significant (p = 0.46) by the log-rank test. Ind = the patient was inducible; NInd = the patient was not inducible.

View larger version (20K): [in a new window]   Figure 3 Kaplan-Meier analysis of freedom from recurrent arrhythmic events during follow-up according to the left ventricular ejection fraction (EF) before surgery. The difference between the groups was significant (p = 0.02) by the log-rank test. EF < 30% = the patient had an ejection fraction < 30%; EF 30% = the patient had an ejection fraction 30%.