RI 心アンギオ法による動脈キャパシタンスの定量評価

概要

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The model assumes that all arterial capacitance (C) can be lumped into one site with resistance (R) parallel to C. A first-pass radionuclide angiography was performed using a digital gamma camera to calculate cardiac output and stroke volume (SV). Cardiac cycle and blood pressure were determined using ECG, phonocardiography and sphygmomanometer. C was calculated by the following basic equation : Pd=Pse^<-t/RC> or C=t/R1/(logPs/Pd) Ps : arterial systolic pressure, Pd : arterial diastolic pressure, t : diastolic interval C ranged frome 0.39 to 2.18ml/mmHg and fell linearly with age (n=124, r=-0.746, p<0.001). In all cases, total systolic pooling of blood in the capacitor was more than 55% of SV. In conclusion capacitance played an important role in arterial circulation.
公益社団法人日本放射線技術学会の論文
1990-12-01