Comparison of Outcomes following Mitral Valve Repair versus Replacement for Chronic Ischemic Mitral Regurgitation: A Meta-Analysis.

 The selection of mitral valve surgery, including mitral valve repair and mitral valve replacement, is still an important dilemma for patients with chronic ischemic mitral regurgitation. We carry out a meta-analysis to evaluate the effectiveness and safety of mitral valve repair versus replacement for ischemic mitral regurgitation.  We searched PubMed, Embase, the Cochrane Library, and Web of Science to identify studies from their inception to July 2015.

[Doppler echocardiographic assessment of CarboMedics prosthesis in patients with mitral valve replacement].

Objective: To evaluate the CarboMedics (CM) prosthesis function two years after mitral valve replacement, and to compare the effective orifice area (EOA) calculated by pressure half-time (PHT) method and continuity method (CON).

Methods: Forty nine patients who underwent isolated mitral valve replacement with a CM prosthesis were recruited in this study, which included 13 cases of 25 mm CM prosthesis and 36 cases of 27 mm CM prosthesis. Two years after the mitral valve replacement, transthoracic echocardiography (TTE) was performed, measuring left ventricular ejection fraction (LVEF), stroke volume mean gradient (SV), PHT, peak early mitral diastolic velocity (E velocity), mean gradient (MG), time-velocity integral of left ventricular outflow tract/time-velocity integral of mitral valve prosthesis (TVI(MVP)/TVI(LVOT)).

[Tricuspid valve replacement and anticoagulation therapy: a report of 70 cases].

Objective: To evaluate the operative indication, the choice of valve prostheses, and the method of anticoagulation therapy of tricuspid valve replacement (TVR).

Methods: From May 1998 to January 2008, 70 patients underwent TVR. There were 59 cases of rheumatic heart diseases.

[Study on levels of angiotensin converting enzyme and C-reactive protein in peripheral blood of mitral valve replacement preoperative patients with atrial fibrillation].

Objective: To evaluate the levels of angiotensin converting enzyme and C-reactive protein in the peripheral blood of mitral valve replacement preoperative patients with atrial fibrillation (AF).

Methods: 24 atrial fibrillation patients, who were hospitalized for mitral valve replacement surgery, as study group (AF group) and 23 sinus rhythm patients as control group (SR group) were included in this study. The angiotensin converting enzyme and C-reactive protein in peripheral blood were quantified and compared in an attempt to find out whether the significant difference existed between the AF and SR groups.

[Impact of cardiopulmonary bypass on free amino acid spectrum in plasma for patients with prosthetic valve replacement during the perioperative period].

Objective: To investigate the impact of cardiopulmonary bypass (CPB) on free amino acid spectrum in plasma for patients with prosthetic valve replacement.

Methods: The concentrations of the free amino acid in plasma for 22 patients with prosthetic valve replacement were measured with pre-column derivatization of high-performance liquid chromatography.

Results: Compared with the preoperative data, the concentrations of some free amino acid in plasma decreased after the operation of cardiopulmonary bypass (CPB), especially some of the glucogenic amino acid and branch chain amino acid decreased significantly (P<0.