title: Acute dysfunction of mechanical aortic valve as electrocardiographic mimic of acute left main coronary artery occlusion.
abstract: We report three patients with acute dysfunction of mechanical aortic valve prosthesis resulting in chest pain, concomitant cardiogenic shock, and electrocardiographic changes mimicking acute occlusion of the left main coronary artery whereas emergency coronary angiography revealed normal coronary arteries. During operation, abnormal proliferation of subvalvular pannus overgrowth on the inflow aspect of the prosthesis was found to impede normal prosthesis closure. We discuss the possible underlying mechanisms of electrocardiographic presentations.
authors.affiliation: Department of Cardiology, The First Affiliated Hospital of Wenzhou Medical College, Wenzhou, China.
authors.forename: Peiren
authors.initials: P
authors.lastname: Shan
authors.forename: Weijian
authors.initials: W
authors.lastname: Huang
authors.forename: Sheng
authors.initials: S
authors.lastname: Li
authors.forename: Hao
authors.initials: H
authors.lastname: Zhou
authors.forename: Fengquan
authors.initials: F
authors.lastname: Dong
authors.forename: Maoping
authors.initials: M
authors.lastname: Chu
authors.forename: Chengchao
authors.initials: C
authors.lastname: Sun
mesh_terms: D000208:Acute Disease; D000368:Aged; D001021:Aortic Valve / Q000601:surgery*; D002637:Chest Pain / Q000209:etiology; D054059:Coronary Occlusion / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004562:Electrocardiography; D005260:Female; D006349:Heart Valve Diseases / Q000175:diagnosis* / Q000601:surgery; D006350:Heart Valve Prosthesis / Q000009:adverse effects*; D019918:Heart Valve Prosthesis Implantation; D006801:Humans; D008297:Male; D008875:Middle Aged; D011475:Prosthesis Failure / Q000009:adverse effects*