Stress reduction can help your heart
DEAR DOCTOR: I’ve been hearing on the news that researchers have discovered that when stress causes a heart attack, it all begins in the brain. How does this work? And is it even possible to control the way our brain responds?
DEAR READER: The same mind-body connection that researchers believe plays a role in heart attack also may offer a measure of protection through techniques like meditation, yoga and mindful relaxation.
Let’s start with the known risk factors for cardiovascular disease: obesity, high cholesterol, hypertension, diabetes and smoking. While mental and emotional stress have long been suspected to contribute to heart disease, the exact mechanism has remained a mystery.
Now researchers from Harvard Medical School have identified the part of the brain that plays a significant role in cardiovascular disease. Known as the amygdala, it’s a small, almondshaped area associated with processing emotion. The amygdala receives and interprets input from throughout the brain. When incoming signals point to danger, the amygdala reacts instantly, bypassing conscious choice. It sets the sympathetic nervous system,
which regulates the fight-or-flight reflex, into action.
Using imaging techniques to measure brain activity, the researchers could link increased activity in the amygdala to increased production of white blood cells by the bone marrow. This led to inflammation in the arteries, which is a risk factor for heart attack and stroke.
The good news is that by using techniques to reduce the stress response, we not only feel more calm and serene, but the benefits can also extend to cardiovascular health.
Yoga has long been shown to reduce stress and promote physical, emotional and mental well-being. Meditation is also quite effective at reducing stress. Tai chi, Pilates and deep breathing are also good for stress reduction. Even a contemplative nature walk can help you leave your worries behind.
Elizabeth Ko, M.D., is an internist and primary care physician at UCLA Health.
Send your questions to askthedoctors@mednet.ucla.edu, or write: Ask the Doctors, c/o Media Relations, UCLA Health, 924 Westwood Blvd., Suite 350, Los Angeles, CA 90095.