Retrograde conduction in complete heart block.
D000368:Aged; D006328:Cardiac Catheterization; D004558:Electric Stimulation; D004562:Electrocardiography; D006325:Heart Atria / Q000503:physiopathology; D006327:Heart Block / Q000503:physiopathology*; D006329:Heart Conduction System / Q000503:physiopathology*; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008875:Middle Aged