Long Inflation at Stent Deployment in Intravascular Ultrasound-Guided Percutaneous Coronary Intervention for Acute Myocardial Infarction

Figures

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  Central Figure.

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  Figure 1.. Study flow chart. The final study population was divided into a long inflation group and a conventional group, according to the inflation procedure at stent deployment. If balloon time was ≥60 s and a single step of inflation, the case was classified into the long inflation group. Cases with other types of stent inflation were classified into the conventional inflation group. AMI, acute myocardial infarction; IVUS, intravascular ultrasound; PCI, percutaneous coronary intervention; TIMI, Thrombolysis in Myocardial Infarction.

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  Figure 2.. Delta Thrombolysis in Myocardial Infarction (TIMI) flow grade in the long inflation group. The changes from initial to final TIMI flow grade were as follows. Among patients with an initial TIMI flow grade of 3 (n=2), all maintained a final TIMI flow grade of 3. Similarly, all patients with an initial TIMI flow grade of 2 (n=14) achieved a final TIMI flow grade of 3. Among those with an initial TIMI flow grade of 1 (n=4), 3 patients achieved a final TIMI flow grade of 3, while 1 had a final TIMI flow grade of 2. In the initial TIMI 0 group (n=30), 26 patients achieved a final TIMI flow grade of 3, and the remaining 4 had a final TIMI flow grade of 2. Notably, there were no cases in which the TIMI flow grade worsened from the initial to the final assessment.

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  Figure 3.. Delta Thrombolysis in Myocardial Infarction (TIMI) flow grade in the conventional inflation group. The transition from initial to final TIMI flow grades was as follows. In the initial TIMI 3 group (n=22), all patients maintained a final TIMI flow grade of 3. In the initial TIMI 2 group (n=130), 122 patients achieved a final TIMI flow grade of 3, while 8 remained at grade 2. Among those with an initial TIMI flow grade of 1 (n=24), 19 achieved a final grade of 3, 4 remained at grade 2, and 1 remained at grade 1. In the initial TIMI 0 group (n=110), 90 patients achieved a final TIMI flow grade of 3, 18 reached grade 2, and the remaining 2 patients had a final grade of 1. Notably, no cases demonstrated a deterioration in TIMI flow grade from the initial to the final assessment.