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Biomedical subjects

R Gorlin

Publications and source records attributed to R Gorlin.

302 records · Page 17Linked to original sources
PubMedDate not supplied

Changing concepts in the determination of valvular stenosis.

The cardiovascular system can be characterized as a series of chambers connected by tubes and orifices. The circulatory physiology of this system is governed by hydrodynamic laws. The first application of hydrodynamics to stenotic valve orifices was by Gorlin and Gorlin in 1951, with direct measurement of transvalvular pressure gradients in the catheterization laboratory. The relative imprecision of fluid-filled catheters was corrected by the introduction of high fidelity micromanometric catheters in 1978. Echocardiography, which directly measures blood velocity, currently provides an accurate and widely applied tool for hemodynamic evaluation. Measured changes in blood velocity can derive pressure gradients previously measured by cardiac catheterization. In the clinically important range of determinations, there is excellent correlation between echocardiographic methods and the Gorlin formula for calculating valvular stenosis. Although noninvasive evaluation of heart valve stenosis has become standard, the same physical laws apply as in the 1950s, and practitioners need to be aware of the limitations of the various methods of hemodynamic calculation.

Aortic Valve Stenosis↗
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Variant angina.

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Angina Pectoris, Variant↗
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Diabetes and the heart.

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Diabetes Complications↗
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Physicians' reactions to patients: what has happened during the past 10 years.

New stresses have been added to the medical life of physicians in training during the past decade. These include the newly diverse and complex sociocultural environment of the patient, new and renascent lethal diseases, widespread substance abuse, and the effects of the breakdown of the fabric of our society. These factors complicate the practice of medicine as never before. Educators must keep pace and prepare young physicians to understand and then cope with these major new forces.

Communication Barriers↗