THE MEASUREMENT OF THE STROKE VOLUME FROM THE PRESSURE PULSE

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Abstract
The stroke volume of dogs was measured by the dye injn. method in 45 expts. displaying a wide variation of physiologic conditions. Simultaneous pressure pulse contours were recorded. A rough correlation (r = 0.78) was found with pulse pressure, a slightly better one (r = 0.88) was found with pulse pressure corrected for the variation in distensibility which accompanies variations in diastolic pressure and a very good one (r = 0.994) was found with a calculation based upon details of the pressure pulse contour, transmission times to the various parts of the arterial tree and the distensibility of those parts. Tables and formulas are presented from which the stroke vol. of dogs can be calculated to agree within [plus or minus]8.2% (avg. difference) with the stroke vol. as measured by dye injn. and heart rate.

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