Management Algorithm for Vasoplegic Shock After Cardiac Surgery: An Interdisciplinary Collaboration

Area of Science:

• Cardiology
• Critical Care Medicine
• Anesthesiology

Background:

• Vasoplegic shock is a severe distributive shock post-cardiopulmonary bypass, marked by hypotension and catecholamine resistance.
• It affects 5-50% of patients, leading to acute kidney injury, prolonged ICU stays, and increased mortality.
• Current management lacks a universal definition and evidence-based strategies.

Purpose of the Study:

• To develop a pragmatic, algorithmic framework for managing vasoplegic shock after cardiac surgery.
• To provide evidence-based guidance for clinicians based on expert consensus.

Main Methods:

• A structured expert review by 12 clinicians from 6 institutions.
• Comprehensive literature search of PubMed and Embase for relevant studies.
• Iterative discussion and consensus-building to create a management algorithm.

Main Results:

• Identified risk factors: preoperative renin-angiotensin-aldosterone inhibition, prior cardiac surgery, longer bypass duration, and high transfusion burden.
• Preventive strategies involve medication adjustment, intraoperative anesthetic/perfusion management, and judicious transfusion.
• Recommended treatment escalation: norepinephrine, followed by vasopressin, then angiotensin II, with adjuncts for refractory cases.

Conclusions:

• Vasoplegic shock is a frequent and dangerous complication of cardiac surgery.
• An expert-derived treatment pathway offers practical guidance for clinical escalation.
• Future research priorities in vasoplegic shock management were identified.