PMID: 9436567Jan 22, 1998Paper

Comparative rest and exercise hemodynamics of allograft and prosthetic valves in the aortic position

The Annals of Thoracic Surgery
J HasegawaY Kameda

Abstract

Allograft aortic valve replacement has gained widespread acceptance. However, there is little information about in vivo allograft valve function at rest and during exercise. Cardiac catheterization was performed to measure hemodynamic variables at rest and during supine bicycle exercise in 44 patients who had had aortic valve replacement using allograft valves or Bicer or St. Jude Medical prosthetic valves 19 to 27 mm in diameter. Sixteen patients received an allograft valve; 17, a Bicer valve; and 11, a St. Jude Medical valve. There were no significant differences between the three groups in age, body surface area, left ventricular end-systolic and end-diastolic volume indices, exercise cardiac index, exercise heart rate, or work load achieved. Left ventricular and ascending aortic pressures were measured simultaneously according to the transseptal method. The mean pressure gradient was generally higher for the Bicer and St. Jude Medical valves than for the allograft valves, both at rest and during exercise. Significant differences were obtained in patients with small-sized valves (21 and 23 mm); pressure gradients were higher in the prosthetic valve groups. In patients with large-sized prosthetic valves (25 mm), there were no...Continue Reading

References

Aug 1, 1989·Journal of the American College of Cardiology·K KawachiK Inoue
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Citations

Mar 23, 2005·Cardiovascular Pathology : the Official Journal of the Society for Cardiovascular Pathology·Shigeo NagasakaHiroyuki Morioka
Jun 4, 1999·The Annals of Thoracic Surgery·J E RubayR A Dion
Apr 5, 2005·Scandinavian Cardiovascular Journal : SCJ·Cheng-Hon Yap, Michael Yii
Jan 25, 2007·Asian Cardiovascular & Thoracic Annals·Mehrdad SalehiMehdi Sanatkar Far
Nov 4, 2006·Expert Review of Cardiovascular Therapy·Cammon B Arrington, Robert E Shaddy
Apr 8, 1999·Journal of Cardiac Surgery·F da CostaI S Costa

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