Influence of load changes on tricuspid inflow

Title:

Influence of load changes on tricuspid inflow

Creator:

Eva Mandysová and Petr Niederle

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:43817663-6dc8-40ec-887e-b07c3bb02cd8
uuid:43817663-6dc8-40ec-887e-b07c3bb02cd8
issn:0862-8408

Subject:

Patologie. Klinická medicína, dopplerovská echokardiografie, fyziologické aspekty, zátěžová funkční diagnostika (lékařství), Doppler echocardiography, physiological aspects, stress functional diagnostics (medicine), tricuspid valve flow, 14, and 616

Type:

article, články, model:article, and TEXT

Format:

print, bez média, and svazek

Description:

In healthy subjects, the right ventricular filling pattern estimated from tricuspid valve inflow is highly load-dependent. This can be clearly demonstrated by changes of Doppler inflow tracings recorded during tidal breathing at rest. The aim of our study was to test the magnitude of tricuspid inflow changes during more pronounced load changes induced by specific maneuvers. In 31 apparently healthy subjects (16 men and 15 women, mean age 36±16 years) we recorded pulsed Doppler tracings of tricuspid inflow during forced inspiration, elevation of lower extremities (increased preload) and handgrip exercise (increased afterload). The obtained values were compared with end-expiratory phase of tidal breathing at rest. We found a significantly larger increase in the early and late filling velocities (for E and A p<0.001) under the conditions of increasing preload (elevation of legs) and less pronounced, but still significant changes with isometric exercise (for E p<0.001 and for A p<0.01). We conclude that the right ventricular filling pattern in healthy humans is highly load-sensitive and for this reason the effect of any intervention (e.g. pharmacological) must be studied under strict and well-defined resting conditions., E. Mandysová, P. Niederle., and Obsahuje bibliografii a bibliografické odkazy

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Physiological research | 2007 Volume:56 | Number:3

Harvested from:

CDK

Metadata only:

false