Abstract
Aim: The study defines criteria for localization of ventricular arrhythmias. Materials & methods: Data from 40 premature ventricular complex (PVC)/ventricular tachycardia (VT) werestudied. The interval from PVC QRS onset to His potential and ratio of this interval to PVC/VT QRS duration was analyzed. Patients were divided into epicardial and endocardial groups based on mapping/successful ablation site. Results: The interval from PVC QRS onset to His potential in the epicardial versus endocardial group was 99±21ms and 64±37ms (p=0.002). A cut off of 88ms had a sensitivity of 73% and specificity of 76%. A cut off of 0.50 for the ratio had a sensitivity of 82% and specificity of 72%. Conclusion: Two new parameters can help localization of PVC/VTs origin.
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