Transseptal Left Heart Dynamics in Thirty-Two Normal Subjects

Samet, Philip; Bernstein, William H.; Medow, Aaron; Levine, Sydney

doi:10.1378/chest.47.6.632

Cited by 13 publications

(2 citation statements)

References 7 publications

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“…Such a high transmission ratio is unlikely on the basis of the earlier clinical observation of Gillespie et al (1967). Moreover, attenuation of pressure and flow waves in normal pulmonary veins cannot be predicted from these elastic moduli because the normal mean left atrial pressure is between 4 and 12 mmHg, so that the veins may not be in a fully distended state (Braunwald, Brockenborough, Frahm & Rose, 1961;Samet, Bernstein, Medow & Levine, 1965).…”

Section: Calculations and Discussionmentioning

confidence: 99%

The Physical Properties of Human Pulmonary Arteries and Veins

Banks¹,

Booth²,

MacKay

et al. 1978

Clinical Science

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1. We have studied the extensibility of circumferential strips of main pulmonary artery and large pulmonary veins obtained at post mortem from patients of all ages, dying from conditions other than heart and lung disease. 2. The vessel strips were submitted to increasing loads in a tension balance. The pulmonary arteries were found to be readily extensible. This extensibility became less with increasing age. The pulmonary veins were virtually inextensible at all ages. 3. It is postulated that the large extraparenchymal pulmonary veins have a capacitative role in supplying blood from the lungs to the left atrium. This may be accomplished by their collapsible nature, as they have little capability of distension.

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Section: Calculations and Discussionmentioning

confidence: 99%

The Physical Properties of Human Pulmonary Arteries and Veins

Banks¹,

Booth²,

MacKay

et al. 1978

Clinical Science

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“…Numerous reports of data obtained by the injection of indicator into the pulmonary artery and left atrium are available in both patients with heart disease (1-10) and in normal subjects (3,5,11,12). Nevertheless, there is A preliminary report was published as an abstract in Clin.…”

Section: Introductionmentioning

confidence: 99%

Determinants of pulmonary blood volume

Lewis¹,

Gnoj²,

Fisher³

et al. 1970

J. Clin. Invest.

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A B S T R A C T Pulmonary blood volume was determined by the radiocardiographic technique in 49 patients coming to cardiac catheterization. Since this method has not been directly compared with the more commonly useddouble injection of dye, 25 comparisons were carried out in 13 patients of the series. Agreement was good over a range of 4.5-21.1 heart cycles since there was no statistically significant difference between transit time values measured by the two methods.The relation of pulmonary blood volume to other hemodynamic factors in these 49 patients, with and without cardiac or pulmonary disease, was evaluated by means of multiple regression analysis. The analysis carried out for mean transit time indicates that this parameter varies predominately with flow. Pulmonary blood volume, in this series of resting recumbent individuals, varies to a significant degree only with total blood volume and with pulmonary venous pressure. No parameters of vascular distensibility, such as pulmonary vascular resistance, were found to affect the volume of blood in the lungs.The fact that variations in pulmonary blood volume among the subjects could be described by a multiple regression equation linear with respect to total blood volume and pulmonary venous pressure indicates that these variations are the result of passive distention of components of the vascular bed.

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