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Excess intravascular coagulation complicating low cardiac output
Insights
Children with congenital heart disease undergoing cardiopulmonary bypass surgery showed improved coagulation factors post-surgery. However, those who died experienced worsening coagulation, linked to low body temperature and poor perfusion.
Area of Science:
- Pediatric Cardiology
- Hematology
- Cardiovascular Surgery
Background:
- Congenital heart disease (CHD) presents complex challenges in pediatric surgical care.
- Cardiopulmonary bypass (CPB) surgery is a critical intervention for many children with CHD.
- Coagulation disturbances are a known complication following CPB.
Purpose of the Study:
- To investigate serial coagulation factor levels in children with CHD during the early postoperative period after CPB.
- To identify factors associated with adverse coagulation profiles in these patients.
- To evaluate the potential benefit of fresh frozen plasma (FFP) in managing coagulation abnormalities.
Main Methods:
- Serial measurement of coagulation factor levels in 42 children undergoing CPB for CHD within the first 20 hours post-surgery.
- Categorization of patients into acyanotic, surviving cyanotic, and non-surviving cyanotic groups.
- Correlation analysis of coagulation profiles with clinical parameters like skin temperature, blood loss, and cardiac output.
Main Results:
- Acyanotic and surviving cyanotic patients demonstrated progressive improvement in coagulation profiles.
- Twelve cyanotic patients who did not survive showed persistently low or declining coagulation factor levels.
- Coagulation abnormalities correlated significantly with hypothermia and increased blood loss, suggesting intravascular coagulation due to low cardiac output and poor perfusion.
- FFP administration in eight non-surviving patients showed no apparent benefit.
Conclusions:
- Postoperative coagulation profiles in pediatric CPB patients are indicative of outcomes.
- Hypothermia and poor tissue perfusion are significant contributors to coagulopathy after CPB in CHD.
- Excessive intravascular coagulation appears to be a key mechanism underlying these adverse events.
Abstract:
In 42 children with congenital heart disease coagulation factor levels were studied serially during the first 20 hours following cardiopulmonary bypass surgery. The acyanotic patients, and also cyanotic patients who survived the operation, showed a progressive improvement in their coagulation profile from initial low postoperative levels. In 12 cyanotic patients who died within 72 hours, however, the coagulation factor levels either remained low, or fell further, until death. Fresh frozen plasma was administered to eight of these patients without apparent benefit. The abnormal coagulation profile correlated significantly with low skin temperature and increased blood loss and was considered to represent excess intravascular coagulation secondary to low cardiac output and poor tissue perfusion.