Background We aimed to investigate the predictive value of the prognostic nutritional index (PNI) regarding the development of acute kidney injury (AKI) after elective coronary artery bypass grafting (CABG). Methods A total of 336 consecutive patients with normal serum creatinine levels undergoing CABG were enrolled in this retrospective study. AKI was defined as meeting Acute Kidney Injury Network (AKIN) criteria based on the occurrence of creatinine changes within the first 48 h after CABG surgery. The patients were grouped according to whether they developed AKI or not into an AKI (−) and an AKI (+) group. Results AKI developed in 88 (26.2%) of all patients. The PNI was independently predictive of AKI (OR: 0.829, 95% CI: 0.783–0.877, p <  0.001). Moreover, C-reactive protein (CRP), a history of diabetes mellitus, and positive inotropric usage were independent risk factors for AKI in the multivariate logistic regression analysis. The area under the curve (AUC) of the multivariable model, including positive inotrope support, a history of diabetes mellitus, and CRP, was 0.693 (95% CI: 0.626–0.760, p <  0.001) in predicting AKIN. When the PNI was added to the multivariable model, the AUC was 0.819 (95% CI, 0.762–0.865, z = 3.777, difference p = 0.0002). Also, the addition of the PNI to the multivariable model was associated with a significant net reclassification improvement estimated at 88.2% ( p <  0.001) and an integrated discrimination improvement of 0.22 ( p <  0.001). Conclusions Our study demonstrated that decreasing the PNI could be associated with the development of AKI after coronary artery bypass surgery.

Postoperative atrial fibrillation (AF) is a common complication of coronary artery bypass grafting (CABG). The mean platelet volume (MPV) is an important marker of platelet activity and is associated with cardiovascular risk factors. We investigated whether the MPV is associated with the development of AF after CABG. This study included 208 patients undergoing elective isolated CABG. We evaluated the standard preoperative 12-lead electrocardiograph (ECG) recorded at a paper speed of 25 mm/s obtained for each patient from our hospital records before surgery. All study patients underwent standard CABG requiring cardiopulmonary bypass without concurrent valvular surgery. Forty-three patients were excluded. After CABG, all patients were monitored by telemetry and 12-lead ECGs. AF was defined using the established Society of Thoracic Surgeons definition. Postoperative AF occurred in 38 (22%) patients. The hemoglobin and platelet and leukocyte counts were similar in the groups with and without AF. However, the MPV and neutrophil/lymphocyte ratio were significantly higher in the AF group (8.9 [1.4] vs. 7.9 [1.2], p < 0.001 and 3.2 ± 1.9 vs. 2.6 ± 1.2, p = 0.005, respectively). In addition, the C-reactive protein (CRP) levels were significantly higher in the AF group (8.9 [19.6] vs. 5.3 [8.7], p = 0.025). Multivariate logistic regression analysis showed that MPV and CRP were independent predictors of postoperative AF (odds ratio [OR] 2.564, 95% confidence interval [CI] 1.326-4.958, p = 0.005; OR 1.055, 95% CI 1.000-1.114, p = 0.050, respectively). Our results show that increased platelet activity is associated with the development of AF after CABG.

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The outcomes of 3 different methods of repair of left ventricular pseudoaneurysm after myocardial infarction were analyzed retrospectively. The operations were carried out in 22 patients between 1985 and 2008. Repair procedures included primary closure with Teflon-pledgeted sutures, and Dacron or pericardial patches. Overall hospital mortality was 27.3% (2 patients had primary closure, 3 had a Dacron patch, and 1 had a pericardial patch). Mean postoperative bleeding was 885 mL (range, 200-4,800 mL). Mean preoperative and postoperative ejection fractions were 40% (30%-47%) and 48% (30%-65%), respectively. The overall incidence of arrhythmia was 36.4% (8 patients). The incidence of arrhythmia was lowest in the pericardial patch group, but this was not statistically significant. No significant differences in postoperative ejection fraction or hemorrhage were found among the study groups. Mean survival was 61.9 + or - 41.4 months in the 16 hospital survivors. Although the 3 techniques gave similar results, repair with an autologous pericardial patch may offer an advantage in terms of less postoperative arrhythmias.

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