OBJECTIVE -The NH 2 -terminal portion of the precursor of brain natriuretic peptide (NtproBNP) has been reported to be elevated in left ventricular dysfunction. This peptide is a split product from the proBNP molecule, and its level in the circulation is not, as the mature BNP peptide, dependent on the peripheral number of BNP receptors. We aimed to test the hypothesis that asymptomatic left ventricular dysfunction (ALVD), as estimated by Nt-proBNP, would be more prevalent in patients with type 2 diabetes without overt cardiovascular disease in comparison with matched control subjects.
RESEARCH DESIGN AND METHODS-The study population consisted of 253 patients with type 2 diabetes and 230 matched control subjects aged 40 -70 years without any overt heart disease from primary care centers in Western Finland and Southern Sweden. Nt-proBNP was measured in plasma by competitive enzyme immunosorbent assay.RESULTS -Patients with type 2 diabetes were shown to have higher .9]) than control subjects (302.7 pmol/l [215.4 -419.2]) (P Ͻ 0.001). Nt-proBNP levels were independently related to diabetes after adjustment for age, sex, systolic and diastolic blood pressure, BMI, heart rate, drug treatment, serum creatinine, and cystatin C.CONCLUSIONS -Our data suggest that the secretion of Nt-proBNP is increased in type 2 diabetic patients with no overt heart disease, suggesting that type 2 diabetes is associated with a higher prevalence of ALVD than hitherto thought. Nt-proBNP may thus serve as a screening instrument to select patients with type 2 diabetes who could benefit from an echocardiographical examination.
Diabetes Care 27:1929 -1935, 2004T he incidence and prevalence of type 2 diabetes increases worldwide. In the adult population all over the world, the average prevalence for diabetes is estimated to be at least 4.0% (1). This figure is predicted to double until the year 2015 (2). Although microangiopathy represents a severe threat to the population with diabetes, macroangiopathy and subsequent cardiovascular disease are the major causes of morbidity and mortality in these patients. Screening for kidney and retinal complications is already an established part of routine diabetes care today, but there is no comparable reoccurring screening for cardiac complications of diabetes. This may simply be due to the lack of cost-effective methods; an echocardiographical examination is both expensive and time consuming and, therefore, not suited for screening purposes. The most evident cardiac complication is coronary atherosclerosis. Not only is the extent of coronary atherosclerosis increased, the disease becomes clinical earlier and is more generalized in the coronary tree compared with the subjects without diabetes (3). Diabetes is also more prevalent among patients with heart failure. In the Framingham study, male patients with diabetes had twice the risk and female patients five times the risk of a control population to develop heart failure (4). At least partially, this could be explained by the increase in severity and inci...