Related Experiment Video
Updated: Apr 27, 2026
Evaluation of Coronary Flow Reserve After Myocardial Ischemia Reperfusion in Rats
Published on: June 28, 2019
Coronary flow reserve in the remote myocardium predicts left ventricular remodeling following acute myocardial
Rongchao Cheng1, Guoqian Wei1, Longhao Yu1
1Department of Cardiology, The Fourth Affiliated Hospital of Harbin Medical University, Heilongjiang Province, China.
Insights
Coronary flow reserve (CFR) impairment in the non-infarcted heart after acute myocardial infarction (AMI) predicts adverse left ventricular remodeling. This finding highlights CFR
Area of Science:
- Cardiology
- Cardiovascular Physiology
- Medical Imaging
Background:
- Coronary flow reserve (CFR) in non-infarcted myocardium is often compromised after acute myocardial infarction (AMI).
- The clinical implications of impaired CFR in remote myocardial regions post-AMI require further elucidation.
- Understanding this relationship is crucial for predicting cardiac outcomes.
Purpose of the Study:
- To investigate the association between CFR in the non-infarcted myocardium and left ventricular remodeling following AMI.
- To determine if impaired CFR predicts adverse cardiac structural changes after myocardial infarction.
Main Methods:
- Real-time myocardial contrast echocardiography was used to assess CFR in 18 patients post-coronary angioplasty and 10 controls.
- Measurements were taken at one week and six months post-intervention.
- Cardiac troponin I (cTnI) levels were analyzed to assess myocardial injury.
Main Results:
- At one week post-AMI, CFR was significantly lower in the infarcted zone (1.55±0.11) compared to the remote zone (2.05±0.31).
- Patients with lower remote zone CFR (<2.05) exhibited higher admission cTnI levels and increased left ventricular end-diastolic volume at six months.
- This suggests a correlation between reduced CFR and adverse ventricular remodeling.
Conclusions:
- Microvascular dysfunction is a common finding in the myocardium remote from infarction.
- CFR in the non-infarcted myocardium serves as an accurate predictor of adverse left ventricular remodeling post-AMI.
- These findings underscore the importance of assessing CFR for risk stratification in AMI patients.
Purpose:
Coronary flow reserve (CFR) in the non-infarcted myocardium is often impaired following acute myocardial infarction (AMI). However, the clinical significance of CFR in the non-infarcted myocardium is not fully understood. The objective of the present study was to assess whether a relationship exists between CFR and left ventricular remodeling following AMI.
Materials And Methods:
We enrolled 18 consecutive patients undergoing coronary intervention. Heart function was analyzed using real-time myocardial contrast echocardiography at one week and six months after coronary angioplasty. Ten subjects were enrolled as the control group and were examined using the same method at the same time to assess CFR. Cardiac troponin I (cTnI) levels were routinely analyzed to estimate peak concentration.
Results:
CFR was 1.55±0.11 in the infarcted zone and 2.05±0.31 in the remote zone (p<0.01) at one week following AMI. According to CFR values in the remote zone, all patients were divided into two groups: Group I (CFR <2.05) and Group II (CFR >2.05). The levels of cTnI were higher in Group I compared to Group II on admission (36.40 vs. 21.38, p<0.05). Furthermore, left ventricular end diastolic volume was higher in Group I compared to Group II at six months following coronary angioplasty.
Conclusion:
Microvascular dysfunction is commonly observed in the remote myocardium. The CFR value accurately predicts adverse ventricular remodeling following AMI.
