Why the study?
Does the St. Jude Regent aortic valve demonstrate satisfactory hemodynamic performance at rest and during dobutamine stress echocardiography one year after surgery?
Observational (n=112)
Yes
Does the St. Jude Regent aortic valve demonstrate satisfactory hemodynamic performance at rest and during dobutamine stress echocardiography one year after surgery?
The St. Jude Regent aortic valve provides satisfactory hemodynamic performance at rest and during dobutamine stress at one year post-implantation, accompanied by significant regression of left ventricular mass.
Answers are grounded in this paper and cite their sources.
May support St. Jude Regent selection in aortic stenosis; leaves open need for randomized comparisons to contemporary valves.
BACKGROUND: 112 patients who received small and medium sized St. Jude Regent heart valves (19-25 mm) at 7 Scandinavian centers were studied between January 2003 and February 2005 to obtain non-invasive data regarding the hemodynamic performance at rest and during Dobutamine stress echocardiography (DSE) testing one year after surgery. MATERIAL AND METHODS: 46 woman and 66 men, aged 61.8 ± 9.7 (18-75) years, were operated on for aortic regurgitation (17), stenosis (65), or mixed dysfunction (30). Valve sizes were 19 mm (6), 21 mm (33), 23 mm (41), 25 mm (30). Two patients receiving size 27 valves were excluded from the hemodynamic evaluation. Pledgets were used in 100 patients, everted mattress in 66 and simple interrupted sutures in 21. Valve orientation varied and was dependent on the surgeons' choice. 34 patients (30.4%) underwent concomitant coronary artery surgery. RESULTS: There were two early deaths (1.8%) and three late deaths, one because of pancreatic cancer. Late events during follow-up were: non structural dysfunction (1), bleeding (2), thromboembolism (2). At one year follow up 93% of the patients were in NYHA classes 1-2 versus 47.8% preoperatively. Dobutamine stress echocardiography (DSE) was performed in a total of 66 and maximal peak stress was reached in 61 patients. During DSE testing, the following statistically significant changes took place: Heart rate increased by 73.0%, cardiac output by 85.5%, left ventriclular ejection fraction by 19.6%, and maximal mean prosthetic transvalvular gradient by 133.8%, whereas the effective orifice area index did not change. Left ventricular mass fell during one year from 215 ± 63 to 197 ± 62 g (p < 0.05). CONCLUSION: The Dobutamine test induces a substantial stress, well suitable for echocardiographic assessment of prosthesis valve function and can be performed in the majority of the patients. The changes in pressure gradients add to the hemodynamic characteristics of the various valve sizes. In our patients the St. Jude Regent valve performed satisfactory at rest and under pharmacological stress situation.
No takes yet. Share an insight, caveat, or question.
Offstad et al. (2011) conducted an observational in Aortic regurgitation, stenosis, or mixed dysfunction (n=112). St. Jude Regent aortic valve vs. Preoperative baseline was evaluated on Mean transvalvular gradient (mmHg) (p=<0.01).
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: