SummaryAppropriate use of biomarkers is clinically important for identifying heart failure in its early stage, optimizing risk stratification, and managing patients. This article describes established and traditional biomarkers as well as novel biomarkers reflective of myocardial stress, myocardial damage, extracellular matrix, oxidative stress, inflammation, renal function, micro RNAs, and heart failure with preserved left ventricular ejection fraction. This review focuses on the recent advances in cardiac and non-cardiac biomarkers of heart failure and their appropriate use in clinical practice. (Int Heart J 2014; 55: 474-481) Key words: BNP, NT-proBNP, ST2, Troponin, H-FABP, Galectin-3, Cystatin C, Pentraxin 3 C ardiovascular diseases are the predominant cause of death in developed countries. Among the afflicted, patients with heart failure are increasing, and this complex syndrome is becoming a public health problem, especially with the aging of populations. To establish diagnostic, therapeutic, and prognostic strategies, the identification of reliable biomarkers for heart failure is necessary.1,2) Although a number of biomarkers have been developed, the ideal biomarkers should meet certain criteria: 1) non-invasive sample collection, 2) a high degree of sensitivity and specificity, 3) able to detect the disease at an early stage, 4) sensitivity high enough to reflect relevant changes in disease conditions, 5) a long halflife within the sample, 6) rapid measurement system responding to clinical needs, and 7) low cost. 3,4) In this article, the focus will be on the recent advances in cardiac and non-cardiac biomarkers of heart failure and their appropriate use in clinical practice.
Myocardial Stress MarkersB-type natriuretic peptide: B-type natriuretic peptide (BNP) is a well-established biomarker, extensively used for the diagnosis and prognosis of patients with heart failure. BNP is a cardiac hormone, identified as the second compound of the natriuretic peptide family and secreted predominantly from the ventricle in response to mechanical overload. 5) In the failing heart, increased wall stress and neurohormonal activation facilitate BNP secretion chiefly from ventricular myocytes. BNP promotes diuresis, vasodilatation, and attenuation of renin and aldosterone secretion. Tsutamoto, et al initially measured plasma levels of BNP in 85 patients with chronic heart failure and a left ventricular ejection fraction (LVEF) of less than 0.45.
6)The plasma levels of BNP increased in proportion to the severity of heart failure. Plasma levels of BNP were 5-fold higher in non-survivors than in survivors. Among clinical and hemodynamic parameters, Cox proportional hazard analysis revealed that only plasma BNP (P < 0.0001) and pulmonary capillary wedge pressure (P = 0.003) were significant independent predictors of mortality in patients with heart failure. Plasma levels of BNP provided prognostic information independent of other variables previously associated with a poor prognosis. To date, a number of studies have r...