High-speed rotational atherectomy: six-month serial quantitative coronary angiographic follow-up.
One hundred twenty-three patients treated with high-speed rotational atherectomy (HSRA) were restudied 6.9 +/- 1.2 months later. At the follow-up, the number of focal concentric lesions increased from 32.2 percent to 63.0 percent, p<0.01, with decrease of type C lesions from 54.8 percent to 30.8 percent, p<0.05. Comparison of the degree of the net gain (NG) showed more severe baseline lesions in the high-gain group (NG >20 percent) compared with the moderate-gain group (20 percent > NG > 0 percent) and to the loss group (minimal luminal diameter [MLD] 0.8 +/- 0.4 mm vs 1.0 +/ 0.4 mm, p<0.05; and 1.2 +/- 0.5 mm; p<0.01, respectively). Highest initial gain (36.5 percent +/- 26.2 percent vs 24.5 percent +/- 18.1 percent; p<0.015; and 19.0 percent +/- 23.2 percent; p<0.001) as well as lowest late loss (1.8 percent +/- 21.7 percent vs 14.0 percent +/-18.4 percent; p<0.01 and 28.1 percent +/- 25.0 percent; p<0.01) were found in the high NG group. A higher interaction between burr and atheroma resulted in the lowest restenosis rate of 6 percent.
Stertzer
S H
SH
Stanford University Hospital, Palo Alto, CA 94304, USA.
Pomerantsev
E V
EV
Fitzgerald
P J
PJ
Yock
P G
PG
Yeung
A C
AC
Shaw
R E
RE
Walton
A S
AS
Singer
A H
AH
Sanders
W J
WJ
Oesterle
S N
SN
D000368:Aged; D017225:Atherectomy, Coronary / Q000379:methods; D017023:Coronary Angiography; D003327:Coronary Disease / Q000000981:diagnostic imaging* / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D066298:In Vitro Techniques; D008297:Male; D008875:Middle Aged; D016896:Treatment Outcome