Determination of causes of ineffective pacing in patients with implanted fixed rate pacemakers.
D001145:Arrhythmias, Cardiac / Q000209:etiology; D004562:Electrocardiography; D004566:Electrodes; D006326:Heart Auscultation; D006801:Humans; D009991:Oscillometry; D010138:Pacemaker, Artificial / Q000009:adverse effects / Q000295:instrumentation / Q000592:standards*