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We report a case involving a patient with ischemic cardiomyopathy who developed polymorphic ventricular tachycardia (PVT) and ventricular fibrillation storm after coronary artery bypass graft. Because PVT was initiated by various right bundle branch type premature ventricular contractions (PVCs), we assessed the relatively monomorphic ventricular tachycardia (MVT) during PVT. Electroanatomical mapping revealed that the earliest ventricular activation of the MVT was located in the scar border zone at the posterior septum of the left ventricle. Stable potentials which preceded the MVT were observed. Catheter ablation for the preceding potential suppressed the maintenance of the PVT, although triggered PVCs appeared frequently. Catheter ablation was effective as a bailout therapy in a patient with PVT-induced cardiomyopathy after cardiac operation. (J Arrhythmia 2010; 26: 140-145)

Pulmonary vein (PV) stenosis is a rare but critical complication of PV isolation. It is usually diagnosed after patients become aware of their symptoms. However, we report a case of left PV stenosis diagnosed before the onset of symptoms via the detection of accelerated pulmonary vein flow observed as abnormal mosaic flow in the left atrium during follow-up echocardiography.

Effects of isoproterenol infusion on the ST segment and r of the QRS complex in the right precordial leads of the Brugada-type electrocardiogram pattern