Heart Failure Archive

For people with all types of cardiovascular disease, regular exercise helps prevent the disease from getting worse. Even very short exercise stints can make a difference. Many people with heart disease qualify for cardiac rehabilitation, which includes an exercise stress test that shows how your heart and body respond to exertion. The results can inform recommendations for safe, effective physical activity.

With this issue of the Harvard Heart Letter, Dr. Christopher Cannon, professor of cardiology at Harvard Medical School, becomes editor in chief.

Mounting evidence paints a worrisome picture of the potential health consequences of nontraditional shift work schedules. So how can people who are required to work during the night and sleep during the day protect their health and well-being?

The human heart normally keeps a predictable pace, but occasionally you might notice a sensation that feels like your heart is racing, fluttering, or has skipped a beat. While this can be alarming, it's usually not a cause for concern.

Statins were more effective at lowering cholesterol levels compared with six dietary supplements touted for heart health benefits, including managing cholesterol.

Stroke survivors who take their blood pressure drugs as prescribed may be less likely to experience a serious fall compared with those who don't take their medications on schedule.

Increasing the volume or intensity of daily physical activity helps lower a person's risk of cardiovascular disease. Boosting both appears to lower risk even further.

Arm curls, which strengthen your biceps, can be done with dumbbells or household items such as cans of soup or water bottles.

Microvascular disease refers to problems in the network of tiny blood vessels in the heart. Doctors suspect this condition in people who have angina (chest) pain with no evidence of blockages in the heart's larger arteries. In the most common form of microvascular disease, the inner walls of small arteries thicken, and the layer of cells closest to the blood lose their ability to expand and contract in response to the demand for increased blood flow, such as during exercise. In another form of the problem, vasospastic angina, muscles within the heart's arteries suddenly clamp down, causing a temporary spasm that blocks blood flow to heart muscle.

About 20% of people have high blood levels of lipoprotein(a)—Lp(a) for short—a fatty particle that's like the evil twin of the more familiar LDL ("bad") cholesterol. Elevated Lp(a) which can double or triple risk of a heart attack and raise stroke risk, and is linked to problems with the heart's aortic valve. With new treatments that can lower Lp(a) on the horizon, cardiologists are now testing more people for this biomarker, which is not included in standard cholesterol tests.