Re-entry in the ventricles.
D000818:Animals; D002036:Bundle of His / Q000503:physiopathology; D002037:Bundle-Branch Block / Q000503:physiopathology; D004285:Dogs; D004562:Electrocardiography; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D013610:Tachycardia / Q000503:physiopathology; D014693:Ventricular Fibrillation / Q000503:physiopathology