Relation Between Left Ventricular Diastolic Pressure and Myocardial Segment Length and Observations on the Contribution of Atrial Systole

Author:

LINDEN R. J.1,MITCHELL J. H.1

Affiliation:

1. Laboratory of Cardiovascular Physiology, National Heart Institute, Bethesda, Md.

Abstract

A method is described for the continuous recording of changes in the length of a segment of left ventricular myocardium, and its advantages and limitations are discussed. The curve depicting the relation between ventricular diastolic pressure and simultaneous changes in the length of a myocardial segment is presented. For a given increment in pressure, the myocardial segment length increases more at low ventricular diastolic pressure than at high pressure. Atrial systole causes a substantial increase in myocardial segment length when the ventricle is on the sensitive part of its pressure-length curve.

Publisher

Ovid Technologies (Wolters Kluwer Health)

Subject

Cardiology and Cardiovascular Medicine,Physiology

Reference19 articles.

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4. Cardiodynamics in heart block as affected by auricular systole, auricular fibrillation and stimulation of the vagus nerve;GESELL R. A.;Am. J. Physiol.,1916

5. Teclmic for estimating changes in ventricular myocardial fiber length: Observations on the effect of stellate ganglion stimulation (abstr.) Fed;MITCHELL J.;Proc.,1959

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