Sino-auricular block: long-term response to isoproterenol.
D000368:Aged; D001146:Arrhythmia, Sinus / Q000188:drug therapy* / Q000209:etiology; D006801:Humans; D007545:Isoproterenol / Q000008:administration & dosage*; D008297:Male; D013997:Time Factors
D007545:Isoproterenol