Intraoperative transesophageal echo-Doppler evaluation of stentless aortic xenografts. Incidence and significance of moderate gradients.
Cardiovasc Surg
; 10(4): 328-32, 2002 Aug.
Article
em En
| MEDLINE
| ID: mdl-12359402
ABSTRACT
BACKGROUND:
The aim of this study was to assess the utility of intraoperative transesophageal echocardiography (TEE) in the evaluation of patients undergoing aortic valve replacement with the CryoLife-O'Brien (CLOB) Stentless Porcine Aortic Bioprosthesis.METHODS:
Between May 1994 and March 1995, 26 patients (15 men, mean age 68.4+/-10.78 years) had a CLOB valve in the aortic position. Transprosthetic gradients and valve regurgitation were detected by intraoperative TEE. Prosthetic regurgitation and transvalvular gradients were evaluated at six-month intervals using transthoracic echo-Doppler (TTE).RESULTS:
The majority of implants resulted in low gradients (83.7%), with only four patients exhibiting a moderate gradient (15.3%). Color flow Doppler imaging showed central aortic regurgitation in only four of 25 patients (trivial, n=4; mild, n=1). There was one paravalvular leak (trivial, n=1). At follow-up examination (mean 37+/-12 months), 24 of 25 patients exhibited low mean gradients (7.25+/-2.81 mmHg). At follow-up one patient who had low velocities in the LVOT at perioperative evaluation exibited a moderate gradient (45 mmHg) with an effective orifice area of 0.8-0.9 cm(2).CONCLUSIONS:
Intraoperative TEE was effective in assessing prosthetic stentless valve function.
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Base de dados:
MEDLINE
Assunto principal:
Valva Aórtica
/
Bioprótese
/
Próteses Valvulares Cardíacas
/
Ecocardiografia Transesofagiana
/
Cuidados Intraoperatórios
Idioma:
En
Ano de publicação:
2002
Tipo de documento:
Article