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Systems engineering analysis of aortic root blood pressure
This paper describes the aortic blood pressure as a function of aortic blood flow and the parameters of the blood and circulatory system. The method...
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The effect of distension of the left ventricle of the heart on the length of the individual myocardial fibers
Based on the ellipsoid model of the left ventricle and the helicoidal course of the left ventricular myocardial fibers, a theory has been developed...
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The motion of the left ventricle. I
The complex arrangement of the muscle fibers in the ventricular wall and the nonsymmetric contraction and expansion of the ventricle preclude the...
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Studies on the relations between pressure and flow in the circulation
Simple theoretical models are proposed for the study of the interdependence between cardiac contraction, arterial pressure, and capillary drainage....
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The cardiovascular effects of the carotid sinus mechanism
The feedback mechanism by means of which the carotid sinus affects arterial blood pressure is represented with the use of the single chamber model of...
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An Elastic reservoir theory of the human systemic arterial system using current data on aortic elasticity
A review of the literature of aortic elasticity data leads to the conclusion that the pressure-volume curves of the human aorta can be reasonably...
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The approximation method, relational biology and organismic sets
It is pointed out that the approximation method for diffusion problems, developed by N. Rashevsky in 1937 and successfully used since then by many...
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On the theory of the cardiovascular system
Most theoretical studies of the circulation have focussed on the transmission line properties of arteries. Only a small number of papers have dealt...
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Control of the contractility of the myocardium in a feedback system
Experimental evidence strongly suggests that the contractility of the intact heart in situ, in contrast to that of striated muscle elsewhere in the...
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Estimation of aortic distensibility and instantaneous left ventricular volume in living man
A method is presented in this paper for the estimation of aortic distensibility and instantaneous systolic left ventricular volume in living man in...
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An analysis of the aortic pressure curve during diastole
Aortic diastolic pressure curves calculated on the basis of a constant peripheral resistance do not predict humps like those found in actual clinical...
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Variation of pressure with cycle length and duration of systole in the two-chambered cardiovascular model
Variation in the heart rate and the duration of systole modifies the pressures in the two-chambered model of the cardiovascular system by several...
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A concentric layer model for estimating the energy expenditure of the left ventricle
The energy cost of the left ventricle is quantitatively analyzed on the basis of the following assumptions: (1) The left ventricle is assumed to be...
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