It would seem logical, reasoning from one’s armchair, that outbursts of anger are bad, and that they could trigger important adverse health consequences, especially if they occurred frequently, were severe, and happened to individuals with preexisting heart disease. Conversely, periods of calm, whether created by yoga, meditation, music, medication, or whatever, might be beneficial.
The results of this literature review and meta-analysis confirmed the adverse impact of anger. The review included nine independent case-crossover studies of anger outbursts: myocardial infarction/acute coronary syndrome in four, ischemic stroke in two, ruptured intracranial aneurysm in one, and ventricular arrhythmias in two. Despite substantial heterogeneity among the studies, all found that, compared with other times, a higher rate of cardiovascular events occurred in the 2 hours following the outburst of anger.
The mechanism most certainly is mediated, at least in large part, by sympathetic discharge, with its known effects on blood pressure, heart rate, myocardial wall stress, clotting, and vascular resistance. Studies in dogs years ago found that dogs made angry by food deprivation developed an increased ability for having a life-threatening ventricular arrhythmia, and that such changes were sympathetically mediated.[SUP]1[/SUP]
Thus, the take-home message: keep calm!