Significance of late ventricular potentials in myotonic dystrophy.
In 39 patients with myotonic dystrophy, we found a high percentage of infrahissian cardiac conduction abnormalities (51%) and late potentials (46%), whereas spontaneous and inducible ventricular arrhythmias were rare. These results suggest that the prolongation of QRSD and the duration of the low-amplitude signal on the signal-averaged electrocardiogram were related to delayed activation of the His and Purkinje tissue rather than true late potentials.
Babuty
D
D
Department of Cardiology B, Faculté de Médecine, Tours, France.
Fauchier
L
L
Tena-Carbi
D
D
Poret
P
P
Leche
J
J
Raynaud
M
M
Fauchier
J P
JP
Cosnay
P
P
D000328:Adult; D001283:Atrioventricular Node / Q000503:physiopathology; D002036:Bundle of His / Q000503:physiopathology; D005117:Cardiac Complexes, Premature / Q000503:physiopathology; D004562:Electrocardiography; D015716:Electrocardiography, Ambulatory; D005260:Female; D006327:Heart Block / Q000175:diagnosis / Q000503:physiopathology; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009223:Myotonic Dystrophy / Q000175:diagnosis / Q000503:physiopathology*; D011690:Purkinje Fibers / Q000503:physiopathology; D012307:Risk Factors; D012815:Signal Processing, Computer-Assisted