High blood pressure treatment also improves heart function

DALLAS, June 18 Treating high blood pressure with medications not only lowers blood pressure but also makes the heart work better, according to one of the largest studies of its kind. The study appears in today's rapid access issue of Circulation: Journal of the American Heart Association.

"Our results prove beyond the shadow of a doubt that there are benefits for heart muscle from effective, sustained control of hypertension. This is yet one more reason for doctors to be very persistent in helping patients reduce their blood pressure to normal levels," says author Richard B. Devereux, M.D., professor of medicine at Weill Medical College of Cornell University and director of the echocardiography laboratory at New York Presbyterian Hospital.

One in four adults has high blood pressure, according to the American Heart Association.

Researchers undertook the study to evaluate whether heart function could improve, and whether that improvement would go beyond what one might expect by just lowering blood pressure.

Devereux compares the heart's performance during chronic high blood pressure to changes in the arm muscles from weightlifting: "The heart walls thicken, just as the biceps thicken from lifting weights, resulting in an increased demand for blood supply and energy," he says.

The study included 647 hypertensive patients who had enrolled in the Losartan Intervention for Endpoint (LIFE) Echocardiography Sub Study. Patients underwent an echocardiogram (ultrasound of the heart) at the start of the study, then yearly for the next two years. Researchers measured the mass of the left ventricle and its contractility. Contractility is a measure of how much the left ventricle cavity reduces and how much the muscular wall thickens during contractions.

Blood pressures were taken at the end of the echocardiogram, while patients were on the examining table. This allowed researchers to relate the heart's function to the blood

Contact: Carole Bullock
American Heart Association

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