Volume 61, Issue 3 pp. 354-359
Coronary Artery Disease

Gamma radiation for in-stent restenosis: effect of lesion length on angiographic and clinical outcomes

Roxana Mehran MD

Roxana Mehran MD

Cardiovascular Research Foundation, Lenox Hill Heart and Vascular Institute, New York, New York

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Ioannis Iakovou MD

Ioannis Iakovou MD

Cardiovascular Research Foundation, Lenox Hill Heart and Vascular Institute, New York, New York

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George Dangas MD, PhD,

Corresponding Author

George Dangas MD, PhD,

Cardiovascular Research Foundation, Lenox Hill Heart and Vascular Institute, New York, New York

Lenox Hill Heart and Vascular Institute and Cardiovascular Research Foundation, 55 East 59th Street, 6th Floor, New York, NY 10022Search for more papers by this author
Alexandra J. Lansky MD

Alexandra J. Lansky MD

Cardiovascular Research Foundation, Lenox Hill Heart and Vascular Institute, New York, New York

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Gregg W. Stone MD

Gregg W. Stone MD

Cardiovascular Research Foundation, Lenox Hill Heart and Vascular Institute, New York, New York

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Gary S. Mintz MD

Gary S. Mintz MD

Intravascular Ultrasound Imaging and Cardiac Catheterization Laboratory, Washington Hospital Center, Washington, D.C

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Kenneth M. Kent MD, PhD

Kenneth M. Kent MD, PhD

Intravascular Ultrasound Imaging and Cardiac Catheterization Laboratory, Washington Hospital Center, Washington, D.C

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Augusto D. Pichard MD

Augusto D. Pichard MD

Intravascular Ultrasound Imaging and Cardiac Catheterization Laboratory, Washington Hospital Center, Washington, D.C

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Lowell F. Satler MD

Lowell F. Satler MD

Intravascular Ultrasound Imaging and Cardiac Catheterization Laboratory, Washington Hospital Center, Washington, D.C

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Martin Fahy MSc

Martin Fahy MSc

Cardiovascular Research Foundation, Lenox Hill Heart and Vascular Institute, New York, New York

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Martin B. Leon MD

Martin B. Leon MD

Cardiovascular Research Foundation, Lenox Hill Heart and Vascular Institute, New York, New York

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Ron Waksman MD

Ron Waksman MD

Intravascular Ultrasound Imaging and Cardiac Catheterization Laboratory, Washington Hospital Center, Washington, D.C

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First published: 19 February 2004
Citations: 3

Abstract

The relation between lesion length and effectiveness of gamma radiation treatment (γ-RT) has not been well described. We evaluated the acute and long-term outcome according to baseline lesion length in 130 patients treated with 192Ir in the Washington Radiation for In-Stent Restenosis Trial; 44 (35.5%) had baseline short in-stent restenosis (ISR) lesions (length < 15 mm) and 80 (64.5%) long ISR lesions (length ≥ 15 mm). At 6-month follow-up after γ-RT, the short ISR group had larger lumen dimensions and lower late loss than the long ISR group. Restenosis rate was significantly higher in patients with long ISR for both the placebo (74% vs. 39%; P = 0.01) and the γ-RT arm (31% vs. 5.3%; P = 0.04). γ-RT significantly improved the angiographic outcome in the short-lesion groups but had the more pronounced effect on the reduction of clinical events after treatment of long ISR group. Lesion length remains a powerful predictor of recurrent ISR and clinical events after treatment of ISR even with γ-RT. Catheter Cardiovasc Interv 2004;61:354–359. © 2004 Wiley-Liss, Inc.

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