A Novel Rotablator Technique (Low-Speed following High-Speed Rotational Atherectomy) Can Achieve Larger Lumen Gain: Evaluation Using Optimal Frequency Domain Imaging

Table 3

Angiographic and procedural characteristics (QCA) (n= 30 lesions).

	HSRA; (n= 15)	LSRA +HSRA; (n= 15)	P value
Location			0.31
Left anterior descending	12 (80)	13 (87)
Left circumflex	2 (13)	0 (0)
Right coronary artery	1 (7)	2 (13)
Guide catheter			0.07
6F	11 (73)	6 (40)
7F	4 (27)	9 (60)
Before procedure
Pre-RVD (mm)	2.19 ±0.51	2.07 ±0.46	0.47
Lesion length (mm)	16.68 ±10.47	14.20 ±8.21	0.48
Pre-MLD (mm)	0.85 ±0.16	0.83 ±0.22	0.81
Pecking motion times
190,000 rpm	33.2 ±12.3	36.9 ±31.5	0.58
110,000 rpm	-	11.9 ±4.3	-
total	33.2 ±12.3	48.8 ±29.6	0.05
Immediately after RA
Post-MLD (mm)	1.24 ±0.29	1.34 ±0.33	0.38

Values are n (%) or mean ± SD.
HSRA= high-speed rotational atherectomy, LSRA +HSRA= low-speed rotational atherectomy following HSRA, MLD= minimal lumen diameter, QCA= quantitative coronary angiography, RA= rotational atherectomy, and RVD= reference vessel diameter.
Pecking motion times data were not available in 1 case in LSRA +HSRA group. They were excluded in the analysis of pecking motion times comparison between the groups.