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A best evidence topic in cardiac surgery was written according to a structured protocol. The question addressed was 'Is left ventricular superior to right ventricular pacing in children with congenital or postoperative complete heart block?' Altogether, 19 papers were found using the reported search, of which 9 represented the best evidence to answer the clinical question. The authors, journal, date and country of publication, patient group studied, study type, relevant outcomes and results of these papers are tabulated. Two large multicentric showed that site of pacing was the major determinant of left ventricular (LV) function with LV pacing being superior to RV pacing, though the number of patients paced via LV was lesser in comparison to right ventricular (RV). There were 2 prospective, 2 retrospective and 1 cross-sectional studies with fewer patients that demonstrated superiority of LV over RV pacing in preserving LV function. Only 1 small-scale retrospective study showed similar results of LV and RV pacing on LV function. One cross-sectional study showed superiority of LV apical pacing on exercise tolerance. As per the existing literature, LV apex seems to be the most optimal site for epicardial pacing while RV free wall pacing has the highest risk of causing LV dysfunction over the long term. We conclude that LV pacing appears to be superior to RV pacing in terms of long-term effect on cardiac function and ventricular synchrony., (© The Author(s) 2021. Published by Oxford University Press on behalf of the European Association for Cardio-Thoracic Surgery. All rights reserved.)

The mixed type of total anomalous pulmonary venous connection is the least common variant, occurring in approximately 5% of all patients. Dual drainage through a common venous confluence is much rarer. Computed tomography to delineate the exact pulmonary venous anatomy is a must in such cases. Correct preoperative recognition and intraoperative confirmation to check the drainage of all 4 pulmonary veins is essential in all cases of total anomalous pulmonary venous connection. We report the case of an adult patient with dual drainage to coronary sinus and left vertical vein to innominate vein.

Background: The aim of this study is to evaluate the causal relation between hospital-acquired infection (HAI) and clinical outcomes following cardiac surgery in neonates and infants and to identify the risk factors for the development of HAI in this subset of patients., Materials and Methods: After Ethics committee approval, one hundred consecutive infants undergoing open heart surgery (OHS) between June 2015 and June 2016 were included in this prospective observational study. Data were prospectively collected. The incidence and distribution of HAI, the microorganisms, their antibiotic resistance and patients' outcome were determined. The Centers for Disease Control and Prevention criteria were used for defining HAIs. Univariate and multivariate risk factor analysis was done using Stata 14., Results: Sixteen infants developed microbiologically documented HAI after cardiac surgery. Neonatal age group was found to be most susceptible. Lower respiratory tract infections accounted for majority of the infections (47.4%) followed by bloodstream infection (31.6%), urinary tract infection (10.5%), and surgical site infection (10.5%). Klebsiella (36.8%) and Acinetobacter (26.3%) were the most frequently isolated pathogens. HAI was associated with prolonged ventilation duration ( P = 0.005), Intensive Care Unit stay ( P = 0.0004), and hospital stay ( P = 0.002). Multivariate risk factor analysis revealed that preoperative hospital stay (odds ratio [OR] 1.22, 95% confidence interval (CI) 1.6-1.39, P = 0.004), and prolonged cardiopulmonary bypass (CPB) (OR 1.03, 95% CI 1.01-1.05, P = 0.001) were associated with the development of HAI., Conclusion: HAI still remains a dreaded complication in infants after OHS and contributing to morbidity and mortality. Strategies such as decreasing preoperative hospital stay, CPB time, and early extubation should be encouraged to prevent HAI., Competing Interests: There are no conflicts of interest.