It usually functions for 70 yr without failure, and works so efficiently that very little blood is regurgitated ... reversed flow would then be required to close the valve. This action suggests ...
For example, a capillary is microscopically thin to allow gases to exchange, the arteries are tough and flexible to cope with high pressure blood flow and the veins contain valves to prevent the ...
Sometimes, the aortic valve opening narrows – a serious condition called aortic stenosis . This narrowing obstructs blood flow from your heart into your aorta and out to the rest of your body.
The veins also have valves that keep blood from flowing backward and pooling in your arms and legs. When your blood doesn't move as well as it should, the blood flow in your veins slows down.
Disease of the cardiac valves and other cardiac structures frequently results in abnormal, turbulent blood flow within the heart, causing murmurs. Careful auscultation of heart murmurs is an ...
The area of a normal mitral valve is 4 to 6 cm 2. This area is sufficient to allow a great deal of blood to flow from the left atrium (LA) to the left ventricle. When any disease process decreases ...