American heart journal
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American heart journal · Mar 2000
Clinical Trial Controlled Clinical TrialThree-dimensional echocardiographic assessment of annular shape changes in the normal and regurgitant mitral valve.
To compare mitral annular shape and motion throughout the cardiac cycle in patients with normal hearts versus those with functional mitral regurgitation (FMR). ⋯ FMR is associated with annular dilation and reduced cyclic variation in annular shape and area. Normal mitral valve function may depend on normal annular 3D shape and dimensions as well as annular plasticity. These observations may have implications for design and selection of mitral annular prostheses.
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American heart journal · Mar 2000
Clinical TrialMitral repair in patients with a ruptured papillary muscle.
The objective of this study was to evaluate the feasibility of a modified papillary muscle repair procedure for a group of patients with ischemic mitral regurgitation when ischemia/infarction has resulted in the rupture of a papillary muscle. From January 1997 to January 1999, 843 patients underwent mitral valve surgery in our hospital. Mitral reconstruction was performed in 520 (61.7%) patients, and 6 (1.2%) of these patients were found to have a rupture of a papillary muscle at initial examination. ⋯ Our results indicate that our modified papillary muscle reimplantation procedure is a valuable surgical tool with good survival results in patients with ischemic mitral regurgitation caused by papillary muscle rupture.
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American heart journal · Mar 2000
Randomized Controlled Trial Clinical TrialMagnesium supplementation in the prevention of arrhythmias in pediatric patients undergoing surgery for congenital heart defects.
The efficacy of magnesium in the prevention of arrhythmias in pediatric patients after heart surgery remains unknown. Therefore we prospectively examined the effect of magnesium treatment on the incidence of postoperative arrhythmias in pediatric patients undergoing surgical repair of congenital heart defects. ⋯ Although this study was originally targeted to include 100 patients, the protocol was terminated because of the unacceptable incidence of hemodynamically significant junctional ectopic tachycardia that was present in the placebo group. Thus low magnesium levels in pediatric patients undergoing heart surgery are associated with an increased incidence of junctional ectopic tachycardia in the immediate postoperative period.