Sensitive Blood Test Rules Out Heart Attack
Added On : 2nd January 2012
Test Measures Very Low Levels of Heart Protein, Troponin I When someone is having chest pain or other heart symptoms, its not always easy to tell whether theyve suffered a heart attack.
An electrocardiogram (ECG), one of the key tests used to confirm heart damage, isnt always conclusive. When that happens, doctors may use a blood test that measures a muscle protein in the blood. If someone has high levels of the protein, known as troponin I, they are more likely to have suffered heart damage.
Now, an even more sensitive version of the test may be more helpful in ruling out a heart attack accurately and quickly, according to new research in the Journal of the American Medical Association.
Researchers from Germanys University Heart Center Hamburg who used the newly developed test were able to accurately rule out a heart attack close to 99% of the time by repeating the test.
Among the 1,818 patients in the study, the more sensitive test proved to be more effective for ruling out heart attacks than regular troponin I testing.
This test appears to be able to detect more subtle forms of damage to the heart, says American Heart Association president Gordon Tomaselli, MD, who is chief of cardiology at Johns Hopkins Heart and Vascular Institute in Baltimore.
Over-diagnosis of heart attacks is a common issue that can lead patients to get treatments that may not be needed.