[Abdominal complications following heart surgery]

Area of Science:

• Cardiology
• Gastroenterology
• Surgical Complications

Background:

• Intra-abdominal complications following cardiopulmonary bypass (CPB) are infrequent but associated with high mortality.
• Pathogenesis and risk factors for these complications remain poorly understood, necessitating further investigation.

Purpose of the Study:

• To identify causative factors of intra-abdominal complications after CPB.
• To evaluate diagnostic and therapeutic strategies for these critical events.
• To emphasize the importance of early diagnosis and immediate treatment for improved patient outcomes.

Main Methods:

• A retrospective review of 500 patients undergoing CPB over 14 months.
• Comparison of patients with and without intra-abdominal complications regarding risk factors.
• Evaluation of diagnostic procedures (serum lactate, sigmoidoscopy, coloscopy) and therapeutic interventions.

Main Results:

• 9 (1.8%) patients developed intra-abdominal complications, with a 44% mortality rate.
• Common complications included bowel necrosis, ischemic colitis, and pseudo-obstruction.
• Identified risk factors: advanced age, vascular disease, atrial fibrillation, prolonged CPB times, vasopressor use, low cardiac output, and multiple organ failure.

Conclusions:

• Intraoperative complications leading to prolonged CPB times, low cardiac output, and vasopressor use contribute to mesenteric hypoperfusion and splanchnic ischemia.
• Pre-existing vascular disease exacerbates ischemia, potentially worsened by pseudo-obstruction.
• Early detection through clinical assessment and diagnostic procedures, coupled with prompt treatment, is vital to reduce mortality.