Korean Circ J. 2008 Nov;38(11):612-617. Korean.
Published online Nov 30, 2008.
Copyright © 2008 The Korean Society of Cardiology
Original Article

Impact of Drug-Eluting Stents on Clinical Outcomes in Patients With Diffuse Coronary Lesions

Hyeon Gook Lee, MD,1 Kook Jin Chun, MD,2 Kyoung Im Cho, MD,1 Dong Won Lee, MD,1 Jun Hyuk Oh, MD,2 Byung Jae Ahn, MD,2 Seong Ho Kim, MD,2 Joon Sang Lee, MD,2 Moo Young Kim, MD,2 Woo Hyung Bae, MD,2 Woo Seog Ko, MD,2 Joon Hoon Jeong, MD,2 Tae Ik Kim, MD,1 Han Cheol Lee, MD,2 Jun Kim, MD,2 June Hong Kim, MD,2 Taek Jong Hong, MD,2 and Yung Woo Shin, MD2
    • 1Division of Cardiology, Department of Internal Medicine, Maryknoll Medical Center, Busan, Korea.
    • 2Division of Cardiology, Department of Internal Medicine, College of Medicine, Pusan National University, Busan, Korea.
Received October 05, 2005; Revised July 24, 2008; Accepted August 21, 2008.

Abstract

Background and Objectives

In the era of stents, lesion length remains an important predictor of restenosis. Drug-eluting stents (DESs) have significantly reduced in-stent restenosis (ISR), but results in long lesions are still lacking. Therefore, we investigated the impact of DESs on clinical outcomes in patients with diffuse coronary lesions.

Subjects and Methods

Between January 2004 and January 2005, 80 patients (94 lesions) with lesions >20 mm in length were treated with one or more DESs and underwent follow-up coronary angiography. The patients were divided into three groups: Group 1 was composed of those with lesions 21 to 35 mm in length, Group 2 was composed of those with lesions 36 to 50 mm in length, and Group 3 was composed of those with lesions ≥51 mm in length.

Results

The mean clinical follow-up duration was 9 months. On the 6-month follow-up angiogram, 6.4% of the lesions had binary ISR (5.0% in group 1, 8.7% in group 2, and 9.1% in group 3). The percent diameter stenosis was 6.0±18.15% in Group 1, 12.61±21.99% in Group 2, and 19.81±31.26% in Group 3(p< 0.05). Late lumen loss was 0.17±0.50 mm in Group 1, 0.39±0.66 mm in Group 2, and 0.59±0.93 mm in Group 3 (p<0.05). Lesion length was associated with an increase in percent diameter stenosis and late lumen loss (of 6.9% and 0.21 mm per 15 mm).

Conclusion

DES implantation is considered safe and effective in the treatment of diffuse lesions. However, lesion length may be associated with an increase in percent diameter stenosis and late lumen loss at 6-month follow-up.

Keywords
Coronary stenosis; Drug-eluting stents; Coronary restenosis

Figures

Fig. 1
Percent diameter stenosis among the 3 groups. Group 1 was composed of those patients who had lesions 21 to 35 mm in length, Group 2 was composed of those who had lesions 36 to 50 mm in length, and Group 3 was composed of those who had lesions ≥51 mm in length. *p<0.05. DS: diameter stenosis.

Fig. 2
Late lumen loss based on quantitative coronary angiography among the 3 groups. Group 1 was composed of those patients who had lesions 21 to 35 mm in length, Group 2 was composed of those who had lesions 36 to 50 mm in length, and Group 3 was composed of those who had lesions ≥51 mm in length. *p<0.05.

Tables

Table 1
Baseline characteristics and nine-month outcomes

Table 2
Angiographic characteristics at baseline and after procedure

Table 3
Nine-month follow-up angiographic characteristics

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