title: Sinus node dysfunction during coronary vasospastic angina.
mesh_terms: D000787:Angina Pectoris / Q000150:complications / Q000503:physiopathology* / Q000628:therapy; D003329:Coronary Vasospasm / Q000150:complications / Q000503:physiopathology* / Q000628:therapy; D004562:Electrocardiography; D006801:Humans; D008297:Male; D008875:Middle Aged; D009543:Nifedipine / Q000627:therapeutic use; D012849:Sinoatrial Node / Q000503:physiopathology*; D013575:Syncope / Q000209:etiology
chemical_list: D009543:Nifedipine