[1st and 2d degree atrio-ventricular blocks caused by disorders of intra-auricular conduction].
In three cases collected among subjects with atrial anatomical lesions (two cases of "sinus disease" with partial atrial paralysis and one traumatic lesion of the right atrium in a WPW syndrome), atrial pacing demonstrated a considerable increase of the interval between stimulus and atrial response or intra-atrial Luciani-Wenckebach periods, for slightly increased pacing rates. Conduction changes into the right atrium explain apparently paradoxical variations of the degree of pre-excitation under pacing, in the case of Wolff-Parkinson-White syndrome.
D001146:Arrhythmia, Sinus / Q000503:physiopathology; D001283:Atrioventricular Node / Q000503:physiopathology; D006328:Cardiac Catheterization; D004558:Electric Stimulation; D004562:Electrocardiography; D006325:Heart Atria / Q000293:injuries / Q000503:physiopathology*; D006327:Heart Block / Q000503:physiopathology*; D006329:Heart Conduction System / Q000503:physiopathology*; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D014927:Wolff-Parkinson-White Syndrome / Q000503:physiopathology
Blocs auriculo-ventriculaires du premier et deuxième degré par trouble de conduction intra-auriculaire