Alterations in left ventricular volumes induced by Valsalva manoeuvre.
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چکیده
منابع مشابه
Alterations in left ventricular volumes induced by Valsalva manoeuvre.
Five patients were studied with left ventriculography during different phases of the Valsalva manoeuvre. Small doses of contrast medium allowed adequate repetitive visualization of the left ventricle for volume calculation. During strain phase, the volume of the left ventricle decreased by nearly 50 per cent in each case, and stroke volume and cardiac output also dropped strikingly. Release of ...
متن کاملLeft ventricular dysfunction--bedside Valsalva manoeuvre.
Thirty-seven patients were evaluated before cardiac catheterisation by bedside physical examination, including Valsalva manoeuvre, to assess the value of the sphygmomanometrically determined arterial pressure responses during the Valsalva manoeuvre and to compare its sensitivity, specificity, and predictive accuracy in the detection of left ventricular dysfunction with that of the commonly used...
متن کاملMonophasic action potential recordings during acute changes in ventricular loading induced by the Valsalva manoeuvre.
OBJECTIVE The strong association between ventricular arrhythmia and ventricular dysfunction is unexplained. This study was designed to investigate a mechanism by which a change in ventricular loading could alter the time course of repolarisation and hence refractoriness. A possible mechanism may be a direct effect of an altered pattern of contraction on ventricular repolarisation and hence refr...
متن کاملLeft Ventricular Volumes
DEVELOPMENT of a satisfactory method for quantifying left ventricular chamber volumes in man has provided an opportunity to assess changes of volume that occur as a result of diseases of the aortic and mitral valves.1-3 These studies provide data concerning the relationships among chamber volume, stroke volume, and filling pressure of the left ventricle in patients with valvular heart disease.
متن کاملDetermination of left ventricular volumes by ultrasound.
We compared dimensions of the left ventricular minor axis (S) measured at enddiastole (SD) and end-systole (Ss) by echocardiography with dimensions and left ventricular volumes measured by biplane angiocardiography in 27 patients with diverse cardiac abnormalities. There were high correlations between echographic and angiographic ventricular minor-axis dimensions (r 0.85 for SD and 0.87 for SS)...
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ژورنال
عنوان ژورنال: Heart
سال: 1974
ISSN: 1355-6037
DOI: 10.1136/hrt.36.7.713