Biomaterial Database

Noninvasive estimation of systolic pressure in the right ventricle in patients with tricuspid regurgitation. 1986

T Skjaerpe, and L Hatle

In 70 patients, tricuspid regurgitation was diagnosed with Doppler by recording reverse flow in systole originating at the tricuspid orifice, directed into the right atrium. The peak velocities were recorded, and the peak pressure drop from the right ventricle to the right atrium in systole was calculated from the simplified Bernoulli equation (pressure drop = 4 X 4 X Vmax2), and was found to correlate well with invasive measurements (r = 0.97, SEE +/- 6.1 mmHg). Central venous pressure was judged by neck vein congestion and added to the pressure drop to obtain a noninvasive estimation of systolic right ventricular pressure. Correlation with catheterization measurements was good (r = 0.96, SEE +/- 7.1 mmHg). In patients in whom the tricuspid regurgitation was judged as mild with Doppler, the correlation between noninvasive and invasive measurements of the transtricuspid pressure drop was still good (r = 0.95, SEE +/- 5.1 mmHg), indicating that the viscosity of the blood does not invalidate the use of the simplified Bernoulli equation when the regurgitant area of the valve is small.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D011312	Pressure	A type of stress exerted uniformly in all directions. Its measure is the force exerted per unit area. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)	Pressures
D011651	Pulmonary Artery	The short wide vessel arising from the conus arteriosus of the right ventricle and conveying unaerated blood to the lungs.	Arteries, Pulmonary,Artery, Pulmonary,Pulmonary Arteries
D001783	Blood Flow Velocity	A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.	Blood Flow Velocities,Flow Velocities, Blood,Flow Velocity, Blood,Velocities, Blood Flow,Velocity, Blood Flow
D002496	Central Venous Pressure	The blood pressure in the central large VEINS of the body. It is distinguished from peripheral venous pressure which occurs in an extremity.	Venous Pressure, Central,Central Venous Pressures,Pressure, Central Venous,Pressures, Central Venous,Venous Pressures, Central
D002648	Child	A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.	Children
D002675	Child, Preschool	A child between the ages of 2 and 5.	Children, Preschool,Preschool Child,Preschool Children
D005260	Female		Females
D006321	Heart	The hollow, muscular organ that maintains the circulation of the blood.	Hearts