Three-dimensional cross-sectional velocity distribution in the ascending aorta in cardiac patients
| Autor: | Leidulf Segadal, I. Hessevik, P. Kvitting, Knut Matre |
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| Rok vydání: | 1996 |
| Předmět: |
Aortic valve
Adult Male Cardiac output Heart Diseases Physiology Diastole Hemodynamics medicine.artery Monitoring Intraoperative Ascending aorta medicine Image Processing Computer-Assisted Humans Systole Cardiac Output Aorta Aged Electronic Data Processing General Medicine Anatomy Stroke volume Middle Aged Echocardiography Doppler medicine.anatomical_structure Female Geology Blood Flow Velocity |
| Zdroj: | Clinical physiology (Oxford, England). 16(3) |
| ISSN: | 0144-5979 |
| Popis: | Knowledge of the distribution of velocities across the ascending aorta is important for measurements of cardiac output; for understanding the function of normal and diseased valves and for the evaluation of prosthetic valves. The aim of this study was to investigate, in detail, the spatial distribution of axial velocities in the human ascending aorta, covering a nearly complete cross-section of the lumen in a time continuous modus. During open-heart surgery, blood velocities in the ascending aorta were mapped in 10 patients. All patients had aortic valves with no significant clinical evidence of disease. Pulsed Doppler ultrasound technique was used to measure blood velocity using an intraluminal probe with a 1 mm, 10 MHz crystal connected to a position-sensitive device. The distribution of blood velocity in the aorta 6-8 cm above the valve was characterized by a skewed and irregular peak systolic flow, with maximum velocity posteriorly. There was a positive correlation (r=0.854, P |
| Databáze: | OpenAIRE |
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