Are ejection fraction measurements by echocardiography and left ventriculography equivalent?
GROUND: Left ventricular ejection fraction (EF) is an important parameter in the diagnosis and treatment of patients with coronary heart disease. Previous studies comparing echocardiography and contrast left ventriculography (CVG) for the measurement of EF have shown considerable variation in results, yet, in clinical practice, EF measurements are used interchangeably. The purpose of this study was to assess the concordance between echocardiography and CVG for the determination of EF in routine clinical practice and to identify factors associated with variation in test results. METHODS: We reviewed the medical records of 5,385 patients hospitalized for acute myocardial infarction between 1997 and 2005 as part of a community-based surveillance project. Of these, 741 patients had EF measurements recorded by both echocardiography and CVG during hospitalization. RESULTS: While good correlation (r = 0.73) and no systematic bias were noted between the measurement of EF by echocardiogram comp
