Beneficial effect of rotational atherectomy with low platform speed on late outcomes
Tadayuki Uetani1, Hideki Ishii, Shin-ichi Sakai
1Department of Cardiology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa, Nagoya, Japan. uetani@med.nagoya-u.ac.jp
Background:
Modification of rotational atherectomy (RA) procedures might be expected to alter restenosis rates.
Methods And Results:
From June 1998 (period 2), platform speed was decreased to 150,000-160,000 rpm from the 170,000-190,000 rpm performed from August 1997 to May 1998 (period 1). Patients for the two periods (period 1: 62 patients, 70 lesions; period 2: 85 patients, 91 lesions) demonstrated comparable clinical and angiographic baseline data, allowing immediate and late outcomes to be evaluated for comparison. Restenosis rates in periods 1 and 2 were 57.9% and 33.8%, respectively (P=0.01). Platform speed and lesion length were independent predictors of restenosis by multivariate logistic regression analysis.
Conclusions:
RA with a low platform speed (150,000-160,000 rpm) can be performed with a high success rate and with a lower incidence of restenosis than with a high platform speed (170,000-190,000 rpm).
