Echocardiographic assessment of ejection fraction in left ventricular hypertrophy
| Autor: | Leif Bojö, Bengt Wranne, K Tolagen, B Wandt |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1999 |
| Předmět: |
Adult
Male medicine.medical_specialty animal structures Left ventricular hypertrophy Muscle hypertrophy Radionuclide angiography Internal medicine Mitral valve medicine Humans cardiovascular diseases Radionuclide Angiography Aged Ejection fraction medicine.diagnostic_test business.industry Hypertrophic cardiomyopathy Vascular ring Reproducibility of Results Stroke Volume Stroke volume Middle Aged medicine.disease medicine.anatomical_structure Echocardiography Papers Cardiology cardiovascular system Female Hypertrophy Left Ventricular Cardiology and Cardiovascular Medicine business |
| Popis: | OBJECTIVE—To investigate the value of Simpson's rule, Teichholz's formula, and recording of mitral ring motion in assessing left ventricular ejection fraction (EF) in patients with left ventricular hypertrophy. DESIGN—Left ventricular ejection fraction calculated by Simpson's rule and by Techholz's formula and estimated by mitral ring motion was compared with values obtained by radionuclide angiography. SETTING—Secondary referral centre. PATIENTS—16 patients with left ventricular hypertrophy and a clinical diagnosis of hypertrophic cardiomyopathy or hypertension. RESULTS—Calculation by Teichholz's formula overestimated left ventricular ejection fraction by 10% (p = 0.002) and estimation based on mitral ring motion—that is, long axis measurements—underestimated ejection fraction by 19% (p = 0.002), without significant correlation between ring motion and ejection fraction. There was no significant difference between mean values of ejection fraction calculated by Simpson's rule and measured by the reference method, but a considerable scatter about the regression line with a standard error of the estimate of 9.3 EF%. CONCLUSIONS—In patients with left ventricular hypertrophy the ejection fraction, calculated by Teichholz's formula or Simpson's rule, is a poor measure of left ventricular function. When mitral ring motion is used for the assessment in these patients the function should be expressed in ways other than by the ejection fraction. Keywords: left ventricular hypertrophy; ejection fraction; mitral ring motion; atrioventricular plane displacement |
| Databáze: | OpenAIRE |
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