Traditionally, nausea and vomiting were thought to be related to inferior-wall MIs. However, some studies have suggested that these symptoms are related to infarct size, not location.
Diaphoresis is caused by activation of the sympathetic nervous system from reduced cardiac output and neurohumoral compensatory mechanisms (baroreceptors, RAAS, etc.)
I agree with everything said before. You can get sweaty from vagal stimulation. You can also get sweaty from sympathetic stimulation. So it need not be an inferior MI.
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