title: Prospective study on the occurrence and management of chronic sinoatrial disease, with follow-up.
mesh_terms: D001146:Arrhythmia, Sinus / Q000150:complications / Q000453:epidemiology* / Q000628:therapy; D001281:Atrial Fibrillation / Q000150:complications; D001285:Atropine / Q000627:therapeutic use; D004070:Digitalis / Q000627:therapeutic use; D004562:Electrocardiography; D005260:Female; D006327:Heart Block / Q000453:epidemiology; D006333:Heart Failure / Q000150:complications; D006801:Humans; D007545:Isoproterenol / Q000627:therapeutic use; D008297:Male; D010138:Pacemaker, Artificial; D008517:Phytotherapy; D010946:Plants, Medicinal; D010947:Plants, Toxic; D011446:Prospective Studies; D013575:Syncope / Q000517:prevention & control; D013610:Tachycardia / Q000150:complications
chemical_list: D001285:Atropine; D007545:Isoproterenol