Dual Heart Tests Best for Young Athletes
When Screening for Heart Defects, 2 Tests Better Than 1
Nov. 18, 2009 (Orlando) -- Young athletes should be screened with two common heart tests, not just one -- or early signs of life-threatening heart defects may be missed, researchers report.
"The chance of finding an abnormality is rare, but if it is missed, the consequences are catastrophic," says Theodore Abraham, MD, an associate professor at the Johns Hopkins University School of Medicine's Heart and Vascular Institute.
The two heart tests are an echocardiogram, or ECHO, which measures heart size and pumping function and checks for faulty heart valves, and an electrocardiogram, or EKG, which assesses the heart's electrical rhythms.
Each year in the U.S., more than 3,000 people aged 15 to 34 succumb to sudden cardiac death as a result of heart rhythm disturbances, Abraham says.
Athletes who have inherited tendencies to develop overly enlarged and thickened hearts are particularly at risk, he says.
Many fall victim with little or no warning. Fans often express shock when star athletes, like Reggie Lewis of the Boston Celtics, collapse and die despite seemingly being in peak physical form, he says.
"Studies have shown that screening all athletes is not cost-effective, so we wanted to see if there was a way we could refine the screening process," Abraham tells WebMD.
Dual Heart Tests Pick Up More Problems
The new study, presented at the annual meeting of the American Heart Association, involved 134 Maryland high school athletes participating in the 2008 track and field state championships.
The researchers were looking for life-threatening cardiac abnormalities such as hypertrophic cardiomyopathy, a condition in which the heart muscle thickens abnormally and whose patients often have no symptoms.
"We did a very focused exam. First, we took a 10-minute medical history, then we took weight and blood pressure measurements. Using a stethoscope, we listened for unusual heartbeats or murmurs. Then, we conducted an echocardiogram and an EKG," Abraham says.
None of the student athletes was found to have life-threatening heart defects, but 36 exhibited abnormal findings on ECHO or EKG. Twenty-two abnormalities were detected by EKG alone, nine by ECHO alone, and five were picked up on both tests.