hemodynamic instability
Significant fluctuations in blood pressure, heart rate, or cardiac output requiring intervention.
Full Definition
A clinical state characterized by inadequate tissue perfusion due to abnormal cardiovascular function, manifesting as hypotension, hypertension, tachycardia, bradycardia, or low cardiac output. In cardiac anesthesia, hemodynamic instability is common due to the complex interplay of anesthetic agents, surgical manipulation, cardiopulmonary bypass, and underlying cardiac pathology. Management requires rapid assessment and intervention with vasoactive medications, fluid therapy, or mechanical support devices. The condition may indicate inadequate anesthesia, myocardial ischemia, bleeding, or other perioperative complications requiring immediate attention.
Usage
Usage note: Should be qualified with specific parameters and interventions used.
In Context
- "Hemodynamic instability during sternotomy required norepinephrine infusion and fluid bolus." — Anesthetic record
- "The patient experienced hemodynamic instability following bypass separation, necessitating IABP placement." — Operative report