Intracoronary brachytherapy for in-stent restenosis using long sources reduces restenosis.
Edge restenosis (candy wrapper effect) and late thrombosis remain a problem in various randomized intracoronary brachytherapy (ICBT) trials for the treatment of in-stent restenosis (ISR). Target vessel revascularization (TVR) due to target lesion revascularization (TLR) and edge restenosis can be decreased with the use of longer ICBT sources and debulking devices and has not been systematically studied. We analyzed 226 patients with ISR (240 vessels of 264 lesions; average lesion length 17.5+/-8.9 mm) who had lesion debulking followed by 90 Strontium (Sr) beta-irradiation using the Novoste Betacath system (30 mm source in 144 vessels and 40 mm source in 96 vessels). Dual antiplatelet therapy was recommended for one year. At follow-up of 12+/-2 months, clinical TVR occurred in 9.7%, with TLR in 7.1% and non-TLR in 2.6% of cases. There was no delayed or late subacute thrombosis. Beta-irradiation using a longer 90Sr source after lesion modification with cutting balloon (CB) and or rotational atherectomy (RA), along with the use of long-term dual antiplatelet therapy is safe and associated with single-digit clinical restenosis.
Department of Interventional Cardiology, Mount Sinai Medical Center, One Gustave Levy Place, Box 1030, New York, NY 10029, USA.
Ramanjit
R
Bagga
Annapoorna
A
Kini
Paul
P
Lee
Ajay
A
Agarwal
Mary
M
Duffy
Michael
M
Kim
Samin
S
Sharma
D015906:Angioplasty, Balloon, Coronary; D001918:Brachytherapy / Q000379:methods*; D023903:Coronary Restenosis / Q000517:prevention & control / Q000532:radiotherapy*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010975:Platelet Aggregation Inhibitors / Q000627:therapeutic use; D011446:Prospective Studies; D015607:Stents; D013997:Time Factors
D010975:Platelet Aggregation Inhibitors