title: Two-dimensional echocardiography for prediction of aortic valve prosthesis size. A comparative study of Medtronic-Hall and Carpentier-Edwards supra-annular valves.
abstract: To assess the value of two-dimensional echocardiography (2D ECHO) for predicting prosthetic aortic valve size, the diameter of the aortic annulus was measured before implantation of a Medtronic-Hall valve in 24 patients and a Carpentier-Edwards supra-annular valve in 34. In the Medtronic-Hall group, the average prosthesis size was similar to the average annulus diameter, i.e. 23.2 +/- 2.1 vs 23.0 +/- 3.4 mm (NS), 95% confidence interval for the difference -1.0-0.7 mm. In the Carpentier-Edwards group the corresponding figures were 23.5 +/- 2.1 and 22.0 +/- 2.3 mm (p < 0.001), with 95% confidence interval 0.9-2.0 mm. Correlation between annulus diameter indicated by preoperative 2D ECHO and prosthesis size was stronger in the Medtronic-Hall (r = 0.88, p < 0.001) than in the Carpentier-Edwards group (r = 0.73, p < 0.001). The authors conclude that prosthetic aortic valve size may be accurately predicted by 2D ECHO, with Medtronic-Hall valve size similar to, and Carpentier-Edwards prostheses on average 1-2 mm larger than the 2D ECHO-estimated annulus diameter.
authors.affiliation: Section of Cardiology, University Hospital, Trondheim, Norway.
authors.forename: R
authors.initials: R
authors.lastname: Wiseth
authors.forename: O
authors.initials: O
authors.lastname: Rossvoll
authors.forename: O W
authors.initials: OW
authors.lastname: Levang
authors.forename: T
authors.initials: T
authors.lastname: Skjaerpe
authors.forename: L
authors.initials: L
authors.lastname: Hatle
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001021:Aortic Valve / Q000033:anatomy & histology / Q000000981:diagnostic imaging / Q000502:physiology; D001705:Bioprosthesis; D015150:Echocardiography, Doppler; D005260:Female; D006350:Heart Valve Prosthesis; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D011182:Postoperative Care; D011237:Predictive Value of Tests; D011300:Preoperative Care; D011446:Prospective Studies; D011474:Prosthesis Design