Left Bundle Branch Block morphology Ventricular Tachycardia in a marathon runner

Comparison of endocardial catheter mapping with intraoperative mapping of ventricular tachycardia.

To validate the accuracy of catheter endocardial mapping to localize the origin of ventricular tachycardia (VT), we compared cathether endocardial mapping with intraoperative epicardial and endocardial mapping of 24 morphologically distinct VTs in 18 patients undergoing surgery. Twelve had VT with left bundle branch block morphology and 12 had VT with right bundle branch block morphology. Cathe...

ECG of the month. Idiopathic ventricular tachycardia with a left bundle branch block morphology and right axis deviation.

Comparison of Endocardial Catheter Mapping with Intraoperative Mapping of Ventricular Tachyeardia

To validate the accuracy of catheter endocardial mapping to localize the origin of ventricular tachycardia (VT), we compared catheter endocardial mapping with intraoperative epicardial and endocardial mapping of 24 morphologically distinct VTs in 18 patients undergoing surgery. Twelve had VT with left bundle branch block morphology and 12 had VT with right bundle branch block morphology. Cathet...

Exercise-Induced Right Ventricular Outflow Tract Tachycardia in a Patient with Isolated Left Ventricular Noncompaction

Isolated left ventricular noncompaction is a hereditary cardiomyopathy in which a variety of supraventricular and ventricular arrhythmias could be observed. We report a patient with exercise-induced ventricular tachycardia with left bundle branch block morphology that had characteristics of an idiopathic ventricular tachycardia who was subsequently diagnosed as left ventricular noncompaction. S...

A Case of Left Bundle Branch Block-shaped wide QRS Complex Tachycardia with diagnostic Ambiguity on a Surface Electrocardiogram

In cases of tachycardia with a broad QRS complex, it is important to differentiate between supraventricular tachycardia (SVT) and ventricular tachycardia (VT). Electrocardiogram (ECG)-based differential diagnoses include VT vs. SVT with aberrant conduction, pre-existing bundle branch block (BBB), intraventricular conduction disturbances, and pre-excitation. Several criteria have been described ...