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Usually half a day. Because after that it just starts dying.

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Q: How long can a arm be without blood flow before damage?
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Damage to the left semilunar valve would interfere with blood flow to this vessel?

Damage to the left semilunar valve would interfere with blood flow to the aorta. Damage to the semilunar valve of the right side of the heart would affect the blood flow to the pulmonary artery.


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Yes, as it could stop blood flow temporarily to your brain, causing damage.


How long would your have to hold someone in a rear naked choke before they died?

A rear naked choke works by cutting off blood flow to the brain via the carotid arteries. The brain can last a maximum of 4 minutes without blood flow.


What means nonvascular?

Nonvascular means without fluid. It is often used in understanding blood flow. The cornea of the eye is nonvascular as it has no blood flow directly to it.


What are two ways the risk of types of cancer can be reduced?

One way is that they maybe able to "turn off" cancer before it causes to much damage to the body. Another way to reduce some types of cancer is to use drugs that block the flow of blood to tumors. Without a blood supply, tumors might not be able to continue growing.


What do heart valves do in general?

A heart valve stops the flow of blood backwards when the heart muscle pulses. Without the valve there would be no direction to the flow of the blood.


When taking a pulse why do you not press down?

If you press too hard, you'll pinch the blood vessel shut and cut off the blood flow. And without blood flow there'll be no pulse there to count.


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The valves have to open to let blood flow into a chamber, and close before the blood flows back. If the valves do not open and close precisely on schedule, or if they fail to open or close completely, the blood will not flow efficiently. This can cause fluctuations in blood pressure, lack of flow to organs, or damage to the muscles of the heart. For example, if the aortic valve between the heart and the aorta does not close after the left ventricle contracts, there will be back pressure into the ventricle, less blood pumped out of the heart, and lower pressure in the arteries.


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Increased blood flow can aid in healing. Massage can increase blood flow. As long as the massage does no further damage to the stress factor, yes it could aid the healing process.


What organ does coronary affect?

it's affect the heart because the arteries are damage so the blood can flow or the heart can pump blood and the blood cannot circulate to the otherparts of the body.