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Natriuretic peptides and endothelin-1 in patients undergoing coronary artery bypass grafting

K Danová1, I Pechán, I Olejárová

  • 1Department of Laboratory Medicine, National Institute of Cardiovascular Diseases, Bratislava, Slovakia. katarina.danova@nusch.sk

General Physiology and Biophysics
|December 8, 2007
PubMed

Insights

Off-pump coronary artery bypass grafting (CABG) reduces complications. This study found off-pump CABG did not alter atrial natriuretic peptide (ANP) or brain natriuretic peptide (BNP) levels, but significantly lowered endothelin-1 (ET-1) compared to on-pump surgery.

Area of Science:

  • Cardiovascular Surgery
  • Vascular Biology
  • Surgical Outcomes

Background:

  • Coronary artery bypass grafting (CABG) is a common cardiac surgery.
  • Conventional CABG utilizes cardiopulmonary bypass, associated with potential complications.
  • Off-pump CABG (OPCAB) is an alternative surgical technique aiming to mitigate these risks.

Purpose of the Study:

  • To compare the peri- and postoperative levels of vasoactive peptides in patients undergoing OPCAB versus conventional on-pump CABG.
  • To investigate the impact of different CABG techniques on atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP), and endothelin-1 (ET-1).

Main Methods:

  • A comparative study involving 22 patients undergoing CABG.
  • Patients were divided into two groups: on-pump CABG (n=11) and off-pump CABG (n=11).
  • Plasma levels of ANP, BNP, and ET-1 were measured perioperatively and postoperatively.

Main Results:

  • Perioperative and postoperative plasma levels of ANP and BNP were similar between the on-pump and off-pump CABG groups.
  • A statistically significant difference in ET-1 plasma levels was observed 2 hours after surgery between the groups (p < 0.0001).
  • Plasma ET-1 levels significantly increased in the on-pump CABG group, suggesting potential endothelial damage.

Conclusions:

  • The choice between on-pump and off-pump CABG does not significantly affect peri- and postoperative ANP and BNP levels.
  • Off-pump CABG is associated with significantly lower ET-1 levels post-surgery compared to on-pump CABG.
  • The elevated ET-1 levels in the on-pump group may indicate greater endothelial injury during cardiopulmonary bypass.

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