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J Am Coll Cardiol, 2006; 48:1-11, doi:10.1016/j.jacc.2006.02.056 (Published online 9 June 2006).
© 2006 by the American College of Cardiology Foundation
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STATE-OF-THE-ART PAPER

Biomarkers in Acute Cardiac Disease

The Present and the Future

Allan S. Jaffe, MD*,*, Luciano Babuin, MD* and Fred S. Apple, PhD{dagger}

* Division of Cardiovascular Diseases, Department of Medicine and the Department of Laboratory Medicine and Pathology, Mayo Clinic and Medical School, Rochester, Minnesota
{dagger} Hennepin County Medicine Center and the University of Minnesota School of Medicine, Department of Laboratory Medicine and Pathology, Minneapolis, Minnesota

Manuscript received July 8, 2005; revised manuscript received February 2, 2006, accepted February 16, 2006.

* Reprint requests and correspondence: Dr. Allan S. Jaffe, Cardiovascular Division, Gonda 5, Mayo Clinic, 200 First Street SW, Rochester, Minnesota 55905 (Email: jaffe.allan{at}mayo.edu).

The use of biomarkers to aid diagnosis and treatment is increasing rapidly as genomics and proteomics help us expand the number of markers we can use and as an improved understanding of the pathophysiology of cardiac disease guides their use. However, as with all rapidly expanding fields, there is the risk of excessive enthusiasm unless we are circumspect about the data that guide the clinical use of these new tools. This review focuses first on how to use troponin, which at present is the best validated of the new markers, and will hopefully provide insight into how to use this biomarker more productively by distinguishing subsets of patients and by providing an understanding of the meaning of elevations in various clinical situations. The review then discusses the use as well as the knowledge gaps associated with emerging biomarkers such as B-type natriuretic peptide and C-reactive protein, which are increasingly moving toward more productive clinical use. Finally, it reflects on some of the large number of markers that are still in development.

Abbreviations and Acronyms
  ACS = acute coronary syndrome
  BNP = B-type natriuretic peptide
  CK = creatine kinase
  CRP = C-reactive protein
  cTn = cardiac troponin
  ECG = electrocardiogram
  ESRD = end-stage renal disease
  PCI = percutaneous coronary intervention




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