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Evaluation of Coronary Flow Reserve After Myocardial Ischemia Reperfusion in Rats
Published on: June 28, 2019
Changes in left ventricular ejection fraction and coronary flow reserve after coronary microembolization
Jianying Ma1, Juying Qian, Junbo Ge
1Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Disease, Shanghai, China.
Archives of Medical Science : AMS
|March 30, 2012
Summary
Coronary microembolization (CME) temporarily reduces left ventricular ejection fraction (LVEF) and coronary flow reserve (CFR). Functionality recovers within a week, despite persistent left ventricular dilation after CME.
Area of Science:
- Cardiovascular Research
- Interventional Cardiology
- Physiology
Background:
- Coronary microembolization (CME) is common during percutaneous coronary intervention.
- Limited data exist on the impact of CME on left ventricular ejection fraction (LVEF) and coronary flow reserve (CFR).
Purpose of the Study:
- To investigate the changes in LVEF and CFR following experimentally induced CME.
- To characterize the temporal recovery of cardiac function and hemodynamics post-CME.
Main Methods:
- A CME model was created in miniature swine using microsphere infusion into the left anterior descending artery.
- LVEF was assessed via echocardiography; CFR and myocardial blood flow were measured using Doppler and pressure wires.
Main Results:
- LVEF and CFR significantly decreased at 6 hours post-CME, with LVEF recovery by 1 week.
- Left ventricular end-systolic and end-diastolic volumes increased significantly 1 week after CME.
- Elevated serum ET-1 levels were observed at 6 hours post-CME.
Conclusions:
- CME causes significant, albeit temporary, reductions in CFR and LVEF.
- Cardiac function recovers by 1 week post-CME, accompanied by left ventricular dilation.
