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Low-dose continuous infusion of human atrial natriuretic peptide during and after cardiac surgery

A Sezai1, M Shiono, Y Orime

  • 1Second Department of Surgery, Nihon University School of Medicine, Tokyo, Japan.

The Annals of Thoracic Surgery
|April 6, 2000
PubMed

Insights

Human atrial natriuretic peptide (hANP) improved hemodynamics and diuretic function during cardiopulmonary bypass (CPB). hANP administration reduced vascular resistance and suppressed the renin-angiotensin-aldosterone system in patients undergoing coronary artery bypass grafting.

Area of Science:

  • Cardiovascular Physiology
  • Pharmacology
  • Nephrology

Background:

  • Cardiopulmonary bypass (CPB) can lead to adverse hemodynamic and renal effects.
  • Human atrial natriuretic peptide (hANP) is a hormone with known vasodilatory and diuretic properties.

Purpose of the Study:

  • To evaluate the therapeutic effects of hANP administration during CPB in patients undergoing coronary artery bypass grafting (CABG).

Main Methods:

  • A randomized controlled trial involving 40 patients undergoing CABG.
  • Patients received either hANP or a placebo during CPB.
  • Hemodynamic parameters, urine output, diuretic dosage, and key hormonal levels were monitored.

Main Results:

  • The hANP group exhibited significantly lower central venous pressure, systemic vascular resistance index, and pulmonary vascular resistance index.
  • hANP administration led to increased urine volume, higher glomerular filtration rate, and elevated cyclic guanosine monophosphate levels.
  • The renin-angiotensin-aldosterone system was suppressed, with lower renin and angiotensin-II levels, and reduced pleural effusion in the hANP group.

Conclusions:

  • hANP effectively mitigates CPB-induced complications by reducing peripheral vascular resistance.
  • hANP demonstrates potent diuretic effects and suppresses the detrimental renin-angiotensin-aldosterone system activation.
  • hANP is a promising therapeutic agent for improving outcomes in patients undergoing CPB.
Abstract

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