Related Experiment Video
Updated: Aug 7, 2026

Evaluation of Coronary Flow Reserve After Myocardial Ischemia Reperfusion in Rats
Published on: June 28, 2019
[Correlation between pressure-derived coronary collateral flow and Rentrop grade after primary percutaneous
Zhi-xiong Cai1, Xiao-qing Wang, Bin Lan
1Affiliated Shantou Hospital of Sun Yat-sen University, Shantou 515031, China. czx@sthospital.com
Objective:
To analyze the correlation between pressure-derived collateral coronary flow (PDCF) and Rentrop grade of patients with acute myocardial infarction (AMI).
Methods:
PDCF, determined by the ratio of P(w)/P(a), was measured in 29 patients with AMI of the first onset who received primary percutaneous coronary intervention (PCI) within 12 h after the onset. Sufficient collateral flow (group A, n=19) was defined as PDCF>0.24 and insufficient collateral flow (group B, n=10) as PDCF< or =0.24. Rentrop grade of the collateral flow was evaluated by coronary angiography. Echocardiography was performed on the 3rd and 30th day after PCI. The left ventricular ejection fraction, end-systolic and end-diastolic volumes, and the related indexes were obtained.
Result:
Rentrop grade was significantly related to PDCF (r=0.75, P<0.01), but a wide range of PDCF was observed in patients with Rentrop grade< or =1.
Conclusion:
PDCF measurement allows quantitative evaluation of the collateral flow in patients with AMI.
Related Concept Videos
Acute Coronary Syndrome III: Diagnostic Studies
Acute Coronary Syndrome IV: Interprofessional Care
Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations
Coronary Artery Disease V: Interprofessional Care
Acute Coronary Syndrome I: Introduction

