Intermediate
Technical
IVT
ventricular distention
Abnormal expansion of the cardiac ventricles during cardiac surgery, which can cause subendocardial ischemia and impair recovery.
Full Definition
Overdilation of the ventricles that can occur during cardiac surgery when the heart fills with blood despite cardioplegic arrest. This condition increases myocardial oxygen consumption, causes subendocardial compression, and can lead to poor postoperative ventricular function. Common causes include aortic insufficiency, inadequate venting, or return of bronchial circulation. Prevention requires vigilant monitoring and prompt decompression through venting or temporary pacing.
Usage
Usage note: Acute condition during surgery; distinguish from chronic cardiomyopathy.
In Context
- "Ventricular distention was noted during aortic valve replacement, requiring increased vent flow." — Intraoperative note
- "The patient developed ventricular distention due to significant aortic insufficiency during bypass." — Complication report
Also known as
cardiac distention
ventricular overdistention
Contrasted with
ventricular decompression
Don't confuse with
ventricular dilation
heart failure