Korean Circulation Journal

The Korean Society of Cardiology (대한심장학회)
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Experience with Mechanical Circulatory Support for Medically Intractable Low Cardiac Output in a Pediatric Intensive Care Unit

  • Park, Jung Bin (Seoul National University) ;
  • Kwak, Jae Gun (Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital) ;
  • Lim, Hong-Gook (Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital) ;
  • Kim, Woong-Han (Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital) ;
  • Lee, Jeong Ryul (Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital) ;
  • Kim, Yong Jin (Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital)
  • Received : 2016.06.20
  • Accepted : 2016.11.11
  • Published : 2017.07.31
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Abstract

Background and Objectives: Mechanical circulatory support with extracorporeal membrane oxygenation (ECMO) and ventricular assist device has always been the optimal choice for treating the majority of medically intractable low cardiac output case. We retrospectively investigated our institution's outcomes and variables associated with a high risk of mortality. Subjects and Methods: From 1999 to 2014, 86 patients who were of pediatric age or had grown-up congenital heart disease underwent mechanical circulatory support for medically intractable low cardiac output in our pediatric intensive care unit. Of these, 9 grown-up congenital heart disease patients were over 18 years of age, and the median age of the subject group was 5.82 years (range: 1 day to 41.6 years). A review of all demographic, clinical, and surgical data and survival analysis were performed. Results: A total of 45 (52.3%) patients were successfully weaned from the mechanical assist device, and 25 (29.1%) survivors were able to be discharged. There was no significant difference in results between patients over 18 years and under 18 years of age. Risk factors for mortality were younger age (<30 days), functional single ventricle anatomy, support after cardiac operations, longer support duration, and deteriorated pre-ECMO status (severe metabolic acidosis and increased levels of lactate, creatinine, bilirubin, or liver enzyme). The survival rate has improved since 2010 (from 25% before 2010 to 35% after 2010), when we introduced an upgraded oxygenator, activated heart transplantation, and also began to apply ECMO before the end-stage of cardiac dysfunction, even though we could not reveal significant correlations between survival rate and changed strategies associated with ECMO. Conclusion: Mechanical circulatory support has played a critical role and has had a dramatic effect on survival in patients with medically intractable heart failure, particularly in recent years. Meticulous monitoring of acid-base status, laboratory findings, and early and liberal applications are recommended to improve outcomes without critical complication rates, particularly in neonates with single ventricle physiology.

Keywords

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