Mending a broken heart but breaking the kidney

Area of Science:

• Nephrology
• Cardiology
• Surgical Complications

Background:

• Acute kidney injury (AKI) is a frequent and serious complication following cardiac surgery.
• Cardiopulmonary bypass (CPB) is utilized in 95% of cardiac procedures in Australia and New Zealand.
• Perioperative factors contributing to AKI post-CPB are not fully understood, despite significant implications for patient outcomes.

Purpose of the Study:

• To review the incidence of AKI after cardiac surgery.
• To discuss the short-term and long-term effects of AKI on morbidity and mortality.
• To explore perioperative risk factors associated with CPB and their contribution to AKI development.

Main Methods:

• Literature review examining current incidence of AKI post-cardiac surgery.
• Analysis of perioperative risk factors related to cardiopulmonary bypass.
• Discussion of outcomes related to off-pump surgery, remote ischemic preconditioning, and patients with chronic renal failure.

Main Results:

• AKI following CPB significantly impacts both short-term and long-term patient morbidity and mortality.
• Optimal perfusion strategies during CPB remain undefined despite evolving evidence-based practices.
• Further research is needed to elucidate specific perioperative risk factors and protective strategies.

Conclusions:

• Understanding and mitigating perioperative risk factors is crucial for reducing AKI incidence and improving outcomes in cardiac surgery patients.
• Exploring alternative surgical techniques and novel interventions like remote ischemic preconditioning may offer benefits.
• Special consideration is required for patients with pre-existing chronic renal failure undergoing cardiac surgery.