Effects of Nicorandil on Microvascular Dysfunction in Patients With STEMI Undergoing Primary PCI

In the nicorandil group, intracoronary nicorandil 3mg dissolved in 3ml saline was given within 30 seconds at two time points, one was when the guidewire or ballon passed the lesion and the blood flow was regained, and another was the time before the stent was implanted.

In the control group, 3ml saline was given intracoronary through the guiding catheter within 30 seconds at the same time points in nicorandil group.