Isolated chylopericardium after cardiac operations

Area of Science:

• Cardiovascular Surgery
• Thoracic Surgery
• Gastroenterology

Background:

• Chylopericardium is a rare complication following cardiac operations.
• It involves the accumulation of chyle, a lipid-rich fluid, within the pericardial space.
• Diagnosis can be challenging due to its infrequent occurrence.

Observation:

• Four case histories of chylopericardium post-cardiac surgery are presented.
• Key diagnostic feature is postprandial milky mediastinal drainage, confirmed by Sudan III staining for fat.
• Drainage originates from operative injury to the thoracic duct or its tributaries, or venous thrombosis obstructing thoracic duct flow.

Findings:

• The study identifies operative injury to the thoracic duct or related venous structures as primary causes.
• Milky mediastinal fluid, positive for fat, is a reliable indicator of chylopericardium.
• Management strategies are tailored to drainage volume and duration.

Implications:

• Early recognition and diagnosis are crucial for effective patient management.
• Conservative treatment involves pericardial drainage and a medium-chain triglyceride diet.
• Surgical intervention, such as thoracic duct ligation, may be necessary for persistent or high-volume drainage.