Long-term pervenous atrial pacing.
D000368:Aged; D001145:Arrhythmias, Cardiac / Q000150:complications / Q000628:therapy*; D001919:Bradycardia / Q000628:therapy; D004562:Electrocardiography; D004566:Electrodes; D005260:Female; D006325:Heart Atria; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D010138:Pacemaker, Artificial; D013902:Radiography, Thoracic; D014680:Veins