Journal of the American Society of Echocardiography
Volume 22, Issue 2 , Pages 165-169, February 2009

Effects of Balloon Valvuloplasty on Coronary Blood Flow in Neonates With Critical Pulmonary Valve Stenosis Assessed With Transthoracic Doppler Echocardiography

  • Elhadi H. Aburawi, MD, PhD, FRCPCH

      Affiliations

    • Department of Pediatrics, Division of Pediatric Cardiology, Lund University Hospital, Lund, Sweden
    • Corresponding Author InformationReprint requests: Elhadi H. Aburawi, MD, PhD, FRCPCH, Lund University Hospital, Getingevägen, SE-221 85, Lund, Sweden
    • ,
  • Ansgar Berg, MD, PhD

      Affiliations

    • Institute of Clinical Medicine, Section for Pediatrics, University of Bergen, Bergen, Norway
    • ,
  • Erkki Pesonen, MD, PhD, FAAC

      Affiliations

    • Department of Pediatrics, Division of Pediatric Cardiology, Lund University Hospital, Lund, Sweden

published online 22 December 2008.

Background

Treating pulmonary valve stenosis with balloon valvuloplasty (BV) is a good model to study the effect of right ventricular (RV) pressures on coronary flow.

Methods

Transthoracic Doppler echocardiography was used to register coronary flow in 10 age-matched healthy controls and 7 neonates before and 1 day after BV.

Results

Left ventricular fractional shortening and cardiac output increased significantly after BV. Right coronary artery diameter decreased from 1.2 ± 0.2 to 1.1 ± 0.1 mm (P < .02). Posterior descending coronary artery flow parameters decreased significantly, with blood flow decreasing from 8.4 to 5.7 ± 1.9 mL/s (P < .003). RV end-diastolic pressure and RV systolic pressure explained almost totally the variation in coronary flow (r2 = 0.87).

Conclusions

RV end-diastolic pressure and RV systolic pressure determined coronary flow in neonates with critical pulmonary valve stenosis. Cardiac output and left ventricular fractional shortening increased after pulmonary valve BV.

Keywords: Coronary flow, Pulmonary valve stenosis, Transthoracic Doppler echocardiography

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 This study was supported financially by Lund University Hospital and the Faculty of Medicine of Lund University, Lund, Sweden.

PII: S0894-7317(08)00657-3

doi:10.1016/j.echo.2008.10.021

Journal of the American Society of Echocardiography
Volume 22, Issue 2 , Pages 165-169, February 2009

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