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BioMed Research International
Volume 2015 (2015), Article ID 782026, 6 pages
Clinical Study

Prognostic Significance of NT-proBNP Levels in Patients over 65 Presenting Acute Myocardial Infarction Treated Invasively or Conservatively

Cardiology Clinic of Physiotherapy Division of The 2nd Faculty of Medicine, Medical University of Warsaw, Bielanski Hospital, Ceglowska 80 Street, 02-903 Warsaw, Poland

Received 14 April 2015; Revised 7 July 2015; Accepted 15 July 2015

Academic Editor: Kai Hu

Copyright © 2015 Wojciech Drewniak et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objectives. Assessment of prognostic significance of NT-proBNP level and the effects of invasive (I) and conservative (C) treatment of acute myocardial infarction (AMI) in patients over 65. Materials and Methods. One-year survival was assessed in 286 consecutive patients with AMI aged 65–100 (79 ± 8) subjected to I or C treatment (136 and 150 individuals), respectively. Results. 245 (85%) patients survived in-hospital stay: 124 (91.1%) received I treatment and 121 (80.6%) received C treatment. Heart failure (HF) was diagnosed in 30 patients receiving I treatment (22.6%) and in 71 subjected to C treatment (47.3%), p < 0,0001. NT-proBNP levels in the latter group were significantly higher than in the 185 patients without HF (12311 ± 13560 pg/mL versus 4773 ± 8807 pg/mL, p < 0.0001). NT-proBNP levels after coronary angioplasty were lower than in patients receiving C treatment (5922 ± 10250 pg/mL versus 8718 ± 12024 pg/mL, p = 0.0002). Left ventricular ejection fraction was significantly higher in I patients than in C patients (47 ± 13% versus 42 ± 11.6%, p = 0.004). During the one-year follow-up, 82.3% of I patients and 61.2% of the C patients survived (p < 0.0003). There was a significantly lower probability of death at NT-proBNP below 8548.5 pg/mL. Conclusions. The NT-proBNP level in the first day of AMI is a good prognosticator. One-year follow-up prognosis for patients who received I treatment in the AMI is better than that for C patients. I patients exhibit superior left ventricular function after angioplasty and in the follow-up.