Articles: cardiac-valve-annuloplasty-instrumentation.
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J. Thorac. Cardiovasc. Surg. · Sep 2019
Comparative StudyRight ventricular free wall stress after tricuspid valve annuloplasty in acute ovine right heart failure.
Tricuspid annuloplasty rings may have a direct impact on right ventricular shape and free wall stress, potentially affecting chamber remodeling and recurrent regurgitation. In an acute model of ovine right heart failure, we investigated right ventricular free wall stress after annuloplasty with different prostheses. ⋯ Acute right heart failure significantly increased right ventricular free wall stress, which was normalized with equal efficacy by all studied prostheses. Chronic studies are needed to evaluate long-term effects of annuloplasty rings on right ventricle free wall stress and remodeling.
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Aortic valve repair is currently in transition from surgical improvisation to a reproducible operation and an option for many patients with aortic regurgitation. Our research efforts at improving reproducibility include development of methods for intraoperatively testing and visualizing the valve in its diastolic state. ⋯ This device enables more relevant prerepair valve assessment and also enables a test of postrepair valve competence under physiological pressures.
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J. Thorac. Cardiovasc. Surg. · May 2017
Multicenter Study Observational StudyRemodeling root repair with an external aortic ring annuloplasty.
Although the remodeling technique provides the most dynamic valve-sparing root replacement, a dilated annulus (>25 mm) is a risk factor for failure. Aortic annuloplasty aims to reduce the annulus diameter, thus increasing coaptation height to protect the repair. The results of 177 patients with remodeling and external aortic ring annuloplasty were studied. ⋯ The standardization of remodeling root repair with calibrated expansible aortic ring annuloplasty and cusp effective height assessment improves valve repair outcomes.
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J. Thorac. Cardiovasc. Surg. · May 2016
Early results of extra-aortic annuloplasty ring implantation on aortic annular dimensions.
Dilatation of the aortic annulus is a cause of recurrent aortic regurgitation following the Ross or Yacoub procedures. Use of an extra-aortic annuloplasty ring is a potentially useful adjunct procedure. The aim of this study was to analyze the early effectiveness and mid-term stability of this surgical approach. ⋯ Use of an extra-aortic annuloplasty ring is effective at reducing annular diameters. This remains stable at mid-term follow-up, with preservation of aortic annular dynamics. Longer-term studies are required to determine the continued stability and impact on long-term clinical outcomes.