Atrial rate as an indicator for optimal pacing rate and the pacemaking syndrome.
D000818:Animals; D002648:Child; D004285:Dogs; D005260:Female; D006325:Heart Atria; D006327:Heart Block / Q000503:physiopathology; D006339:Heart Rate; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial