Please use this identifier to cite or link to this item: http://ahro.austin.org.au/austinjspui/handle/1/10055
Title: Factors influencing the mean postoperative gradients across stentless porcine valves.
Authors: Shah, Pallav J;Buxton, Brian F;Matalanis, George
Affiliation: Department of Cardiac Surgery, Austin Hospital, Studley Road, Melbourne, Vic. 3084, Australia.
Issue Date: 1-Mar-2005
Citation: Heart, Lung & Circulation; 14(1): 19-24
Abstract: To study the preoperative and intraoperative variables influencing the mean post-operative transvalvular gradient across stentless porcine valves.From 1995 to 2002, 84 patients underwent stentless valve insertion. The mean age was 73 years, and 63% were male. The valve pathology was aortic stenosis (AS) in 79%, aortic regurgitation (AR) in 12%, and mixed in 9%. Valve sizes ranged from 21 to 29 with size 27 being most frequent. 54% of patients had concomitant procedures. Patients had at least yearly clinical and echocardiographic follow-up.There was no operative mortality. 9.5% of the patients had significant postoperative complications. The average echo interval was 18.6 months (range 1-88). The overall mean transvalvular gradient was 9.88+/-5.67 (SD) mmHg. Variables associated with significantly reduced gradients were: larger valve sizes (p=0.002), younger age (p=0.05), pre-op AR (p=0.008), and increasing post-operative interval (p=0.05). The mean gradients decreased by 0.28 mmHg for each post-operative year. The method of implantation did not significantly affect gradients (p=0.26).Excellent mean transvalvular gradients were achieved with stentless valves studied, with a low operative risk. The gradients did not appear to be related to intra-operative factors, suggesting that insertion techniques can be tailored to suit patient conditions and surgeon preferences.
Internal ID Number: 16352247
URI: http://ahro.austin.org.au/austinjspui/handle/1/10055
DOI: 10.1016/j.hlc.2004.11.004
URL: http://www.ncbi.nlm.nih.gov/pubmed/16352247
Type: Journal Article
Subjects: Aged
Aortic Valve Insufficiency.epidemiology.surgery
Aortic Valve Stenosis.epidemiology.surgery
Bioprosthesis
Comorbidity
Coronary Artery Bypass
Coronary Disease.epidemiology
Female
Heart Valve Prosthesis
Heart Valve Prosthesis Implantation.adverse effects
Humans
Male
Multivariate Analysis
Retrospective Studies
Appears in Collections:Journal articles

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