Hemodynamic evaluation of the St Jude Medical valve prosthesis in the small aortic anulus

Dale Wortham, T. B. Tri, T. E. Bowen

Research output: Contribution to journalArticle

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Abstract

The hemodynamic function of the 19 mm and 21 mm St Jude Medical valve prostheses in the aortic position was evaluated in seven patients who had valve replacement for either severe aortic stenosis or regurgitation an average of 4 months after operation. Cardiac output and simultaneous transvalvular gradient were recorded at rest and during moderate supine arm exercise. The average peak systolic gradient was 14 mm Hg (range 0 to 25 mm Hg) at rest and 32 mm Hg (range 23 to 56 mm Hg) with exercise. The average mean systolic gradient was 20 mm Hg (range 10 to 28 mm Hg) at rest and 38 mm Hg (range 30 to 48 mm Hg) with exercise. The mean effective orifice area was 1.2 cm2 (range 0.9 to 1.4 cm2) at rest and 1.1 cm2 (range of 0.9 to 1.3 cm2) with exercise. Mean cardiac output at rest was 4.4 L/min, and, with exercise, 7.4 L/min. Of the five valves evaluated with root aortography, four demonstrated trivial and one mild aortic insufficiency. We conclude that the St Jude Medical valve prosthesis in the aortic position has favorable hemodynamic function which is particularly evident in the 19 mm and 21 mm sizes when compared with other currently available aortic valve prostheses.

Original languageEnglish (US)
Pages (from-to)615-620
Number of pages6
JournalJournal of Thoracic and Cardiovascular Surgery
Volume81
Issue number4
StatePublished - 1981
Externally publishedYes

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Prostheses and Implants
Hemodynamics
Exercise
Cardiac Output
Aortography
Aortic Valve Insufficiency
Aortic Valve Stenosis
Aortic Valve

All Science Journal Classification (ASJC) codes

  • Cardiology and Cardiovascular Medicine
  • Surgery

Cite this

Hemodynamic evaluation of the St Jude Medical valve prosthesis in the small aortic anulus. / Wortham, Dale; Tri, T. B.; Bowen, T. E.

In: Journal of Thoracic and Cardiovascular Surgery, Vol. 81, No. 4, 1981, p. 615-620.

Research output: Contribution to journalArticle

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