title: Systolic time intervals in patients with artificial pacemakers. Noninvasive technique for assessing atrial contribution to stroke volume at various P-R intervals.
mesh_terms: D000328:Adult; D000368:Aged; D002302:Cardiac Output; D002306:Cardiac Volume; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000503:physiopathology*; D006325:Heart Atria / Q000503:physiopathology; D006329:Heart Conduction System / Q000503:physiopathology; D006331:Heart Diseases / Q000503:physiopathology*; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D010701:Phonocardiography