Effectiveness of cutting balloon angioplasty for small vessels less than 3.0 mm in diameter.

The aim of this study was to evaluate the effectiveness of cutting balloon angioplasty (CBA) in small vessels < 3.0 mm in diameter. Included were 166 patients (175 lesions) treated with CBA (CBA group), and 215 patients (240 lesions) were treated with plain old balloon angioplasty (POBA group). No differences were observed in patient backgrounds or lesion characteristics between the two groups. Procedural success rates were similar: 98.3% (CBA) versus 95.8% (POBA). Coronary dissection rates were also similar: 7.4% in the CBA versus 5.8% in the POBA group. Severe dissections (types E and F) occurred in 2.5% of cases in the POBA group, whereas there was none observed in the CBA group. In-hospital complications occurred in 3.3% in the POBA group, and in only 0.6% in the CBA group. The restenosis rate was 37.5% (CBA group) versus 48.1% (POBA group); and in vessels < 2.75 mm, restenosis was significantly lower in the CBA group than in the POBA group (36.9% vs 62.7%, P < 0.05). CBA may be a useful therapeutic strategy for small vessels, given the absence of severe coronary dissection and the significantly lower rate of restenosis compared to POBA.