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The effect of aortic valve replacement on coronary flow reserve in patients with a normal coronary angiogram

Attila Nemes1, Tamás Forster, Zsolt Kovács

  • 12nd Department of Medicine and Cardiology Center, Albert Szent-Györgyi Medical and Pharmaceutical Center, University of Szeged, Hungary. nemes@in2nd.szote.u-szeged.hu

Herz
|February 8, 2003
PubMed

Insights

Aortic valve replacement (AVR) significantly improves coronary flow reserve (CFR) in patients with aortic stenosis and normal coronary arteries. This long-term study shows AVR benefits myocardial perfusion after valve surgery.

Area of Science:

  • Cardiology
  • Cardiac Surgery
  • Vascular Physiology

Background:

  • Patients with aortic stenosis and normal coronary angiograms often exhibit impaired coronary flow reserve (CFR).
  • The impact of aortic valve replacement (AVR) on CFR in this specific patient group requires further long-term investigation.

Purpose of the Study:

  • To evaluate the long-term effect of AVR on CFR in patients with aortic stenosis and normal coronary arteries.
  • To assess changes in left ventricular mass and coronary flow dynamics post-AVR.

Main Methods:

  • A cohort of 30 patients with aortic stenosis and normal coronary angiograms were studied.
  • Coronary flow reserve (CFR) was measured in 21 patients before and after AVR using a standard protocol with dipyridamole.
  • Measurements included peak systolic and diastolic velocities in the left anterior descending coronary artery via pulsed Doppler.

Main Results:

  • Aortic valve replacement significantly reduced the peak gradient of aortic stenosis (89.5 to 26.2 mm Hg) and left ventricular mass (354.9 to 223.8 g).
  • Post-AVR, CFR increased significantly from 1.96 to 2.37 (p < 0.05).
  • Diastolic velocities in the left anterior descending coronary artery also showed significant improvement postoperatively.

Conclusions:

  • Prosthetic AVR provides substantial long-term benefits for coronary flow reserve in patients with aortic stenosis and normal coronary angiograms.
  • AVR effectively improves myocardial perfusion and reduces cardiac workload in this patient population.
Abstract

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