Advanced
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In the Industry Vocabulary Test
myocardial stunning
Temporary reduction in cardiac contractility following reperfusion after a period of ischemia.
Full Definition
A condition characterized by prolonged but reversible left ventricular dysfunction that occurs after restoration of blood flow to previously ischemic myocardium. Unlike myocardial infarction, stunning involves viable tissue that gradually recovers function over hours to days. In cardiac surgery, stunning commonly occurs after cardioplegic arrest and reperfusion, requiring careful hemodynamic management and sometimes temporary mechanical support during the recovery period.
Usage
Usage note: Distinguish from permanent myocardial damage or hibernating myocardium.
In Context
- "The patient exhibited myocardial stunning post-operatively, requiring inotropic support for 48 hours." — Post-operative note
- "TEE revealed global hypokinesis consistent with myocardial stunning rather than acute ischemia." — Anesthesia assessment
Also known as
post-ischemic dysfunction
reperfusion injury
Contrasted with
normal contractility
hypercontractility
Don't confuse with
myocardial infarction
hibernating myocardium