Relations between ejection fraction and ventricular volume, and their alteration by chronic beta-blockade.
AUTOR(ES)
Kerkhof, P L
RESUMO
This study describes the newly discovered relation between ejection fraction and end-systolic volume index (ESVI) of the left ventricle as obtained by angiography at the time of cardiac catheterisation. Linear regression analysis shows that ejection fraction (%)=82.0-0.62 ESVI (ml/m2) but the correlation for patients receiving beta-adrenergic blocking drugs is significantly lower compared with the untreated group. Non-linear analysis, applied to cover also the asymptotic range for ejection fraction less than 20%, shows similar results. The good relation between the two indices indicates that the index ejection fraction may derive its clinical importance directly from the more fundamental index end-systolic volume index by virtue of the operation of the beta-adrenergic system on the heart.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=482596Documentos Relacionados
- Right ventricular performance in essential hypertension after beta-blockade.
- Improvement of myocardial metabolism in coronary arterial disease by beta-blockade.
- Noradrenaline producing phaeochromocytomas with absent pressor response to beta-blockade.
- Coital blood pressure in hypertensives. Cephalgia, syncope, and the effects of beta-blockade.
- Left ventricular volume and ejection fraction determined by gated blood pool emission tomography.