for how many seconds does the heart stop and pump while sleeping
Answers
it continually pump our blood.
72 times per minute and 0.8 second it takes to complete one cardiac cycle.
yeah av node delay it for 1 by 10 second when blood come from sa node.
here is your answer ☺️
TL:DR - Anything from nothing being noticed to immediate unconsciousness with seizure activity.
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That depends on a lot of things.
Some people lose consciousness right away.
Some people have seizures (not epilepsy seizures, but hypoxic seizures [seizures due to a lack of oxygen]).
Some people remain conscious and do not notice anything unusual.
Some people remain conscious, but notice unusual sensations, such as lightheadedness, weakness, tiredness, or similar feelings.
Some people remain conscious and feel chest pain or shortness of breath.
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One way of explaining this is to point out the similarities to syncope (sudden onset of loss of consciousness) and near-syncope (the sudden onset of not quite loss of consciousness).
Sometimes the cause is neurological, so it is not related to circulation. The question was related to changes in circulation, so I am not going to address neurological causes. However, impaired circulation can produce just about any neurological symptom, so it is best to have a doctor run appropriate tests to try to determine the cause. Even so, the cause is often never identified.
Often the cause is an impairment in circulation due to dilation of the blood vessels (vasodilation) and is believed to be due to stimulation of the vagus nerve (also called the vagal nerve) and is referred to as vasovagal syncope. What happens is that the capacity of the blood vessels suddenly increases, or the amount of blood being pumped suddenly decreases, or a combination of the two. Another possibility is orthostatic hypotension, which means that the person is going from sitting to standing, or from lying down to standing, and the blood vessels are not constricting quickly enough, and/o the heart is not pumping more blood quickly enough, to adapt to the need for a higher blood pressure to provide adequate supplies of blood to the brain.
If you deprive the brain of blood, neurological symptoms, including death, can occur.
There are gender differences in the causes of syncope, but the differences are much smaller for vasovagal and orthostatic causes (etiologies) than might be expected.