Direct and imcomplete concealed Wenckebach phenomena in the left bundle-branch system.
A case is reported showing a tachycardia dependent Wenckebach phenomenon in both the A-V node and the left bundle branch system. Pacing from the His bundle region induced manifest (direct) and imcompletely concealed (indirect) types of Wenckebach phenomenon within the left bundle branch system.
D000200:Action Potentials; D000368:Aged; D001283:Atrioventricular Node / Q000503:physiopathology; D002036:Bundle of His / Q000503:physiopathology; D002037:Bundle-Branch Block / Q000175:diagnosis*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D011690:Purkinje Fibers / Q000502:physiology