Conclusions - Coronary collateral flow remains undiminished for at least 24 hours after successful PCI. Functional collateral support subsequently declines but does not regress completely.

Conclusion: coronary artery collateral circulation might abate myocardial reperfusion injury in patients with coronary artery disease after PCI.

The effect coronary collateral circulation is a compensation way after the normal coronary circulation has been blocked for influence the station.