My dad is at the end of stage 4 cancer , and 4 heart valves are 70-90% blocked what does that mean
If your heating is on but your radiator isn't getting hot, it is most likely blocked. This could be due to air bubbles trapper in the radiator, in which case you will have to 'bleed' it'. If you open up the control and the shield valves, that can help to remove a blockage . Otherwise, you will have to get it taken apart and the blockage cleared by a qaulified professional.
the valves close
Chronic Venous Insufficiency
Bent valvesBent valves
possible blockage in the line, full break in line, debris in valves
this question is vast. if no hot water is not coming out the pipes its possible the pipes can be blocked or the valves are blocked. if the temp is not hot, check wiring to the geyser or the element might need to be changed
The aortic pressure increases and the AV valves close.
The timing belt goes and the valves bend.
It shows you weather you have heart disease, or bad heart valves. It can also show you if their is a blockage somewhere that may lead up at a heart attack.
Make sure it is not the valves, a valve(s) may have been put in backwards. Disassemble the instrument and use air pressure to locate the blockage. Use a wooden stick and air pressure to push blockage out. If this does not work, let the part sit in hot water to help free the blockage. If this does not work, either have a pro look at it or have someone you trust look at it (for a different perspective).
When there is a problem in blood flow there is the risk of cellular death. In the heart, this complication can be fatal, however, this may not be as problematic in the rest of the body depending on the size or the artery blocked. When there is a problem in the blood flow of the heart, which is supplied by the coronary arteries, the myocytes of the heart can die. If a smaller artery in heart is blocked, this cell death can even go unnoticed, but will lead to the fibrosis of the heart tissue, not only making it less compliant, but potentially causing problems in the way the heart functions such as re-entry, which can lead to arrhythmias. In the rest of the body, the blockage of a major vessel can be a big problem. However, if a small blood vessel is blocked the body may have collateral circuits to continue blood supply to tissue. An example of this is the internal thoracic arterty supplying posterior intercostal muscles through the anterior intercostal arteries if the posterior intercostal arteries become blocked. So, blockage of blood vessels can lead to some big problems, especially in the heart; however, the body does have ways of supplying blood to tissues if they become blocked.
As the ventricles of the heart contract the pressure in the ventricles rises beyond that of the atria. This pressure differential causes the AV valves to shut.