Excess intravascular coagulation complicating low cardiac output

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.