The Effect of Ventricular Pacing Rates on the Left Ventricular Volumes

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概要

• 論文の詳細を見る

• The relations of the left ventricular volumes of intact canine heart, such as stroke volume (SV), end-diastolic volume (EDV) and end-systolic volume (ESV), to the heart rates were studied. After atrio-ventricular block, varying ventricular pacing rates, the ventricular volumes were measured by means of thermal dilution using a thermistor with a very short time constant. The results showed that under left atrial pressure clamp, increases in pacing rates ranging from 50 to 160 beats/min. caused decreases in EDV in a considerable extent but no consistent and marked changes in ESV. Measurements of the left ventricular end-diastolic pressure (LVEDP) varying the pacing rates demonstrated that reductions in EDV at higher pacing rates were caused by lowering of LVEDP. From these results, some mathematical expressions on the control of SV were presented.

• International Heart Journal刊行会の論文

著者

• KAMIYA AKIRA

  Institute of Medical Electronics Faculty of Medicine, University of Tokyo

• Togawa Tatsuo

  Institute For Med And Dental Engin. Tokyo Med. And Dental Univ.

• Kamiya Akira

  Institute For Structural And Engineering Materials National Institute Of Advanced Industrial Science

• Togawa Tatsuo

  Institute for Medical and Dental Engineering, Tokyo Medical and Dental University

• KAMIYA Akira

  Institute for Medical and Dental Engineering, Tokyo Medical and Dental University

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