Peer Review #1 of "Comparison of clinical outcomes after drug-eluting balloon and drug-eluting stent use for in-stent restenosis related acute myocardial infarction: a retrospective study (v0.1)"

Abstract

Background Good results of drug-eluting balloon (DEB) use are achieved in in-stent restenosis (ISR) lesions, small vessel disease, long lesions, and bifurcations. However, few reports exist about DEB use in acute myocardial infarction (AMI) with ISR. This study's aim was to evaluate the efficacy of DEB for AMI with ISR. Methods Between November 2011 and December 2015, 117 consecutive patients experienced AMI including STsegment elevation MI, and non-ST-segment elevation MI due to ISR, and received percutaneous coronary intervention (PCI). We divided our patients into two groups: (1) PCI with further DEB, and (2) PCI with further drug-eluting stent (DES). Clinical outcomes such as target lesion revascularization, target vessel revascularization, recurrent MI, stroke, cardiovascular mortality, and all-cause mortality were analyzed. Results Patients' average age was 68.37 ± 11.41 years; 69.2 % were male. A total of 75 patients were enrolled in the DEB group, and 42 patients were enrolled in the DES group. The baseline characteristics between the two groups were the same without statistical differences except gender. Peak level of cardiac biomarker, pre-and post-PCI cardiac function were similar between two groups. The major adverse cardiac cerebral events rate (34.0 % vs. 35.7 %; p=0.688) and cardiovascular mortality rate (11.7 % vs. 12.8 %; p=1.000) were similar in both groups. Conclusions DEB is a reasonable strategy for AMI with ISR. Compared with DES, DEB an alternative strategy which yielded acceptable short-term outcomes and similar 1-year clinical outcomes.