Intermediate
Technical
In the Industry Vocabulary Test
hemodynamic instability
Abnormal blood pressure, heart rate, or circulation indicating cardiovascular compromise.
Full Definition
Hemodynamic instability refers to abnormalities in blood pressure, heart rate, cardiac output, or systemic circulation that suggest cardiovascular compromise. In trauma patients, this often indicates ongoing blood loss, cardiac injury, or distributive shock. Clinical signs include hypotension, tachycardia, altered mental status, and decreased urine output. Recognition of hemodynamic instability guides the urgency of intervention and may indicate the need for immediate surgical control of bleeding.
Usage
Usage note: Use to describe overall circulatory status rather than individual vital sign abnormalities.
In Context
- "The patient demonstrated hemodynamic instability requiring urgent operative intervention." — Surgical consultation note
- "Hemodynamic instability persisted despite initial resuscitation efforts." — ICU progress note
Also known as
circulatory compromise
cardiovascular instability
Contrasted with
hemodynamic stability
normal vital signs
Don't confuse with
hypotension
shock
cardiac arrest