TUESDAY, Dec. 7 (HealthDay News) -- The presence of a certain biomarker in the blood is associated with structural heart disease and increased risk of death from all causes, a new study suggests.
It goes by the name of cardiac troponin T (cTnT) -- a heart-specific protein that serves as a biomarker for diagnosing heart attack.
In addition, elevated cTnT levels are associated with a number of chronic diseases such as coronary artery disease (CAD), heart failure, and chronic kidney disease, according to background information in the study.
"Recently, a highly sensitive assay (test) for cTnT has been developed that detects levels approximately 10-fold lower than those detectable with the standard assay," wrote Dr. James A. de Lemos, of the University of Texas Southwestern Medical Center in Dallas, and colleagues. "In patients with chronic heart failure and chronic CAD, circulating cTnT is detectable in almost all individuals with the highly sensitive assay, and higher levels correlate strongly with increased cardiovascular mortality."
In this study, the researchers used the highly sensitive test and the standard test to measure cTnT levels in 3,546 people, aged 30 to 65, in Dallas County. The prevalence of detectable cTnT among the participants was 25 percent using the highly sensitive test and 0.7 percent using the standard test.
The participants were then put into five categories based on their cTnT levels, and heart structure and function was measured with an MRI.
Detectable levels of cTnT were much more likely to be found in men than in women (37.1 percent vs. 12.9 percent), in blacks compared to Hispanics or whites, and in people aged 60 to 65 (57.6 percent) than in those aged 40 to 50 (14 percent).
The standard test failed to detect cTnT in two-thirds of participants with the highest cTnT levels. Increasing levels of cTnT were associated with higher rates of high blood pressure, diabetes,
All rights reserved