Acute kidney injury following coronary artery bypass graft surgery in a tertiary public hospital in Malaysia: an analysis of 1228 consecutive cases

Background: Acute kidney injury (AKI) following cardiac surgery is well established but the reported incidence is variable due to varying definitions and criteria. Furthermore there is a paucity of such data from Southeast Asia. Objectives: To determine the incidence of AKI, the associated risk factors, and its impact on early mortality and intensive care unit/hospital stay. Method: This is a single centre retrospective observational study to evaluate outcomes on 1260 consecutive patients from a multi-ethnic Southeast Asian population who underwent a primary isolated coronary artery bypass graft (CABG) operation. Data was collected from the hospital’s electronic database and analysed using basic descriptive statistics and logistic regression. Results: Overall incidence was 36.2% including 5.5% of patients who required renal replacement therapy (RRT). Multivariate analysis identified age, insulin-dependent diabetes mellitus (IDDM), baseline serum creatinine level (SCr), recent myocardial infarction (MI), cardiopulmonary bypass (CPB) time and intra-aortic balloon pump (IABP) use as independent risk factors for AKI. For patients who required RRT, the SCr and IDDM remained independent predictors. Early 30-day mortality (11.5% vs 0.9%) was significantly higher in patients who developed AKI following CABG. Similarly, AKI was associated with a slight but statistically significant increase in intensive care unit (ICU) and hospital stay. Conclusion: Better prognostication and preventative strategies are required to better risk stratify patients undergoing CABG and optimise utilisation of limited healthcare resources.

Contemporary Surgical Management of Advanced End Stage Emphysema: An Evidence Based Review

Emphysema is a progressive unrelenting component of chronic obstructive pulmonary disease and a major source of mortality and morbidity globally. The prevalence of moderate to severe emphysema is approximately 5% in Malaysia and likely to increase in the future. Hence advanced emphysema will emerge as a leading cause of hospital admission and a major consumer of healthcare resources in this country in the future. Patients with advanced disease have a poor quality of life and reduced survival. Medical therapy has been largely ineffective for many patients however certain subgroups have disease amenable to surgical palliation. Effective surgical therapies include lung volume reduction surgery, lung transplantation and bullectomy. This article is a comprehensive evidence based review of the literature evaluating the rationale, efficacy, safety and limitations of surgery for advanced emphysema highlighting the importance of meticulous patient selection and local factors relevant to Malaysia.

Surgery for Isolated Non-Inflammatory Chronic Total Occlusion of the Left Main Coronary Artery: A Case Report and Literature Review

Chronic total occlusion (CTO) of the left main coronary artery (LMCA) is a rare manifestation of coronary artery disease (CAD) and defined by a total absence of antegrade blood flow to the left anterior descending (LAD) and circumflex (Cx) system. Patients are at high risk of myocardial ischaemia as a sizeable area of myocardium is at risk and thus require urgent intervention. Surgery is the treatment of choice especially with CTO lesions as percutaneous coronary intervention has limited success with a high restenosis rate. We report a rare case of a young Chinese male who presented acutely with a myocardial infarction and discuss the aetiology and peri-operative technical considerations for successful surgery with this condition.