Brain ischemia (aka cerebral ischemia, cerebrovascular ischemia) is a condition in which there is insufficient blood flow to the brain to meet metabolic demand.This leads to poor oxygen supply or cerebral hypoxia and thus to the death of brain tissue or cerebral infarction / ischemic stroke.ther effects that may result from brain ischemia are stroke, cardiorespiratory arrest, and irreversible brain damage. An interruption of blood flow to the brain for more than 10 seconds causes unconsciousness, and an interruption in flow for more than a few minutes generally results in irreversible brain damage.
A. If the heartbeat is too slow, usually considered a rate below 60 beats a minute, not enough oxygen-rich blood flows through the body. The symptoms of a slow heartbeat are:
bradycardia is the medical term for a heart rate that is too slow specifically a heart rate less than 60 beats per minute in adults however under some circumstances a heart rate less than 60 beats per minute is perfectly healthy and not a cause for interventionhis type of arrhythmia is called a premature contraction premature contractions are common and may even go unnoticed however some people report a feeling of the heart skipping a beat often followed by a stronger than usual beat the pause is actually the heart waiting for the regular rhythm to resume