When an acupuncture needle is inserted at specific sites on the wrist, inside of the forearm or leg, this triggers the release of opioid chemicals in the brain that reduce excitatory responses in the cardiovascular system, according to Longhurst(UC Irvine cardiologist and director of the center )

This decreases the heart's activity and its need for oxygen, which in turn lowers blood pressure and promotes healing for a number of cardiac ailments, such as myocardial ischemia (insufficient blood flow to the heart) and arrhythmias.

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