Pressure-Radius Relationships
نویسندگان
چکیده
منابع مشابه
In vivo pressure-radius relationships of the pulmonary artery in children with congenital heart disease.
The effects of either increased pulmonary artery blood flow or pressure on the magnitude of the radius and the dynamic properties of the right pulmonary artery were studied angiographically in 162 patients during cardiac catheterization. Patients were divided into seven groups according to their hemodynamic findings. The right pulmonary artery radius was measured during systole and diastole, fr...
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We previously outlined the fundamental principles that govern behavior of stabilized bubbles, such as the microbubbles being put forward as ultrasound contrast agents. Our present goals are to develop the idea that there are limits to the stabilization and to provide a conceptual framework for comparison of bubbles stabilized by different mechanisms. Gases diffuse in or out of stabilized bubble...
متن کاملIn Vivo Pressure - Radius Relationships of the Pulmonary Artery in Children with Congenital Heart Disease By JAY
The effects of either increased pulmonary artery blood flow or pressure on the magnitude of the radius and the dynamic properties of the right pulmonary artery were studied angiographically in 162 patients during cardiac catheterization. Patients were divided into seven groups according to their hemodynamic findings. The right pulmonary artery radius was measured during systole and diastole, fr...
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It has been shown in man that myocardial ischemia, whether precipitated by exercise or pacinginduced tachycardia, is associated with abnormalities of left ventricular end-diastolic pressure. There has been controversy as to whether this relationship is due to decreased myocardial compliance or to an increase in left ventricular volume as a manifestation of left ventricular failure. Simultaneous...
متن کاملPressure-radius relationship in large blood vessels of man.
• The measurement of instantaneous blood flow in the great vessels in man is of importance in the study of circulatory dynamics. With the pressure-gradient technique, it is possible to estimate instantaneous blood velocity in man. However, in order to compute instantaneous blood flow from blood velocity, the radius of the vessel under study must be known at every instant in the cardiac cycle. T...
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ژورنال
عنوان ژورنال: Circulation
سال: 1971
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.44.3.491