title: [Long-term hemodynamic results of bifocal pacemaker stimulation].
abstract: Before and during the half year after implantation of a bifocal cardiac pacemaker haemodynamic investigations were done in 16 patients using various stimulations. Compared with ventricular stimulation bifocal pacemaker treatment resulted in an increase of cardiac ejection by 31%, the optimal AV-time being between 150 and 200 ms. Maximum benefit was obtained in patients with primary decreased cardiac index (less than 2.50 l/min X m2). In these patients the increase of cardiac index during atrial stimulation compared to ventricular stimulation was 43%. In pre-existing sinus bradycardia left-ventricular ejection fraction was significantly increased despite lowering of enddiastolic filling pressure both at rest and during bicycle ergometry. These positive haemodynamic changes were demonstrable unaltered 6 months after pacemaker implantation.
mesh_terms: D000368:Aged; D001794:Blood Pressure; D001919:Bradycardia / Q000628:therapy*; D002302:Cardiac Output; D005260:Female; D006325:Heart Atria / Q000503:physiopathology; D006352:Heart Ventricles / Q000503:physiopathology; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D011651:Pulmonary Artery / Q000503:physiopathology
vernacular_title: Hämodynamische Langzeitresultate der bifokalen Schrittmacherstimulation.