title: Acute myocardial infarction with dynamic outflow obstruction precipitated by intra-aortic balloon counterpulsation.
abstract: Dynamic left ventricular outflow obstruction is associated with structural findings of asymmetric septal hypertrophy (less commonly concentric left ventricular hypertrophy) and systolic anterior motion of the anterior mitral valve leaflet. A patient who did not have this usual substrate for outflow obstruction presented with an acute anterior wall myocardial infarction complicated by congestive heart failure and cardiogenic shock. When an intra-aortic balloon pump was placed, the patient rapidly deteriorated and a dynamic outflow gradient was detected.
authors.affiliation: Department of Cardiology, Stony Brook University Hospital, New York, USA.
authors.forename: R W
authors.initials: RW
authors.lastname: Tse
authors.forename: S
authors.initials: S
authors.lastname: Masindet
authors.forename: T
authors.initials: T
authors.lastname: Stavola
authors.forename: J P
authors.initials: JP
authors.lastname: Dervan
authors.forename: W E
authors.initials: WE
authors.lastname: Lawson
mesh_terms: D004562:Electrocardiography; D005260:Female; D006333:Heart Failure / Q000150:complications / Q000175:diagnosis; D006801:Humans; D007423:Intra-Aortic Balloon Pumping / Q000009:adverse effects*; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications / Q000175:diagnosis / Q000628:therapy*; D012770:Shock, Cardiogenic / Q000150:complications; D014694:Ventricular Outflow Obstruction / Q000175:diagnosis / Q000209:etiology*