[The ventricular pressure-volume ratio, an index of left ventricular performance in man].
The left ventricular systolic pressure-volume diagram has been established before and after infusion of Nitro-prusside, Angiotensin and over post-extrasystolic potentiation on 33 patients, by the simultaneous measure of the aortic pressure and the left ventricular volume. In every case left ventricular dp/dt max. and (dp/dt/Pt) max. have been measured before and during post-extrasystolic potentiation, and in 16 cases after vasomotor therapy. The end-systolic left ventricular pressure-volume ratio appears to be independent of loading modifications--more than dp/dt max. and (dp/dt/Pt) max.--and on the opposite to be a good index of inotropic state alterations.
D000804:Angiotensin II; D002306:Cardiac Volume; D006334:Heart Function Tests; D006801:Humans; D009200:Myocardial Contraction; D009599:Nitroprusside; D016276:Ventricular Function
D000804:Angiotensin II; D009599:Nitroprusside
Le rapport pression-volume ventriculaire, indice de performance ventriculaire gauch chez l'homme