title: [Reduction of cardiac ejection fraction as a problem of pacemaker treatment].
abstract: Ventricular pacing often is associated with a decrease of left ventricular output leading to symptoms of diminished cerebral perfusion. This is caused by a loss of properly timed atrial systole. The contribution of the atrial contribution of the atrial contraction to left ventricular output can reach 40% especially in patients with myocardial failure. A particular diminution of cardiac performance can be observed when ventriculoatrial conduction follows ventricular pacing. AV-sequential pacing, however, with a coordinated atrial systole leads to an obvious increase of cardiac output.
mesh_terms: D000368:Aged; D001283:Atrioventricular Node / Q000503:physiopathology; D002302:Cardiac Output; D002303:Cardiac Output, Low / Q000209:etiology* / Q000503:physiopathology; D004562:Electrocardiography; D005260:Female; D006325:Heart Atria / Q000503:physiopathology; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D010138:Pacemaker, Artificial
vernacular_title: Die Reduktion der kardialen Auswurfleistung als Problem der Schrittmacherbehandlung.