The right arm and the left arm get the same oxygenated blood from the heart at about the same exact time regardless of whether or not the heart is in distress. When someone is having a heart attack, pain is felt in the left arm and up into the neck/jaw area because those are the sites where the brain is being told 'pain' is found.īlood coming out of your heart is pumped to the lungs first and is then equally distributed horizontallly across the body. Stomach pain is found in the lower abdomen.which if anyones knows anatomy is certainly not where the actual stomach is located.

It only has to do with where pain receptors are located and where one feels pain for certain organs.

Of course, this is all just speculation and assumption on SWIM's part, but it could be possible that this is the case.Ĭlick to expand.It has nothing to do with the circulatory system. SWIM chose to interpret this possibility as an indication that things put into the left arm may well get to the heart faster. SWIM's guess was that the reason it was affecting the left arm specifically was because when the heart shut down it might cause the circulating blood to 'back up' in areas closest to the end of its circuit through the body, hence the pain in the chest, left angle of the jaw (jugular?), and left arm. So You is completely right in his guess that it had a correlation with the circulatory system itself. Its actually harder than I thought it would be to locate the exact mechanism through which a heart attack causes its hallmark numbing of the left arm.

'The cardinal sign of decreased blood flow to the heart (as in Myocardial infarction) is chest pain experienced as tightness around the chest and radiating to the left arm and the left angle of the jaw.' Click to expand.This is the best I could come up with.

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