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Perioperative transesophageal echocardiography did not reveal any systolic anterior motion, stenosis, paravalvular leakage, or more than residual mitral valve regurgitation in any of the patients after weaning from extracorporeal circulation. The early postoperative clinical outcome is presented in Table 2. Table 2 Postoperative clinical outcome. The 30-day mortality was 0%. At six months follow-up 100% of the patients (n=36) were in NYHA functional class I to II. Hemodynamic changes. The mean PCWP was significantly higher at T0 in patients with severe preoperative LA enlargement (LAVi��60 mL/m2) than in those without (p=0.010). The mean PCWP decreased from 17��9 [http://www.selleckchem.com/products/GDC-0449.html GDC-0449 nmr] mmHg (T0) to 9��4 mmHg (T3) over the first 24 hours, in patients with severe preoperative LA enlargement, which is equivalent to a 32% reduction from baseline (p?[https://en.wikipedia.org/wiki/Quinapyramine Quinapyramine] index, systemic and pulmonary vascular resistances between patients with and without severe preoperative LA enlargement at any of the time points. Changes in hemodynamic variables at the different time points are presented in Figure 2 and Table 3. Figure 2 Mean percentage change in hemodynamic variables after induction of anesthesia (T0) and on postoperative day 1 (T3). Error bars indicate the 95% confidence interval. Table 3 Hemodynamic variables. Natriuretic peptide levels. The mean NT-proBNP level in patients with severe preoperative LA enlargement was higher preoperatively (1326��2573 ng/L) than in those without severe preoperative LA enlargement (233��221 ng/L), p=0.002. Following MVS, the mean NT-proBNP in patients with severe preoperative LA enlargement was highest on D4 (3515��4316 ng/L) and decreased to 708��680 ng/L six months postoperatively (Figure 3). Figure 3 Changes in NT-proBNP measured preoperatively (Dpre), on postoperative day 1 (D1), on postoperative day 4 (D4), and 6 months after surgery (D6m). In patients [http://www.selleckchem.com/products/MS-275.html MS 275] without severe preoperative LA enlargement, an increase in mean NT-proBNP to 1936��1099 ng/L was seen on D4, which fell to 355��341 ng/L six month postoperatively. The mean NT-proBNP levels differed significantly between the two groups at the 6-month follow-up, p=0.028. Late outcome. The pre- and postoperative echocardiographic data are presented in Table 4. Table 4 Echocardiographic data. Patients with severe preoperative LA enlargement demonstrated a 32��18% reduction in LAVi, compared to 20��15% in those without severe preoperative LA enlargement (p=0.059) six months postoperatively.