(Circulation. 1999;99:3149-3154.)
© 1999 American Heart Association, Inc.
Clinical Investigation and Reports |
Preintervention Arterial Remodeling as an Independent Predictor of Target-Lesion Revascularization After Nonstent Coronary Intervention
An Analysis of 777 Lesions With Intravascular Ultrasound Imaging
From the Cardiac Catheterization and Intravascular Ultrasound Imaging Laboratories, Washington Hospital Center, Washington, DC.
Correspondence to Gary S. Mintz, MD, Cardiovascular Research Foundation, Washington Hospital Center, 110 Irving St NW, Suite 4B-1, Washington, DC 20010. E-mail gsm1{at}mhg.edu
Background—Pathological and intravascular ultrasound (IVUS) studies have documented arterial remodeling during atherogenesis. However, the impact of this remodeling process on the long-term outcome after percutaneous intervention is unknown.
Methods and Results—We used preintervention IVUS to define positive and negative/intermediate remodeling in a total of 777 lesions in 715 patients treated with nonstent techniques. Positive remodeling (lesion external elastic membrane area greater than average reference) was present in 313 lesions; intermediate/negative remodeling (lesion external elastic membrane area less than or equal to reference) was present in the other 464. Baseline clinical and angiographic characteristics were similar, except for a slightly higher percentage of insulin-dependent diabetic patients (10.2% versus 6.1%; P=0.054) in the negative/intermediate-remodeling group. Angiographic success and in-hospital and short-term complications were comparable in the 2 groups. There was no significant correlation between remodeling (as a continuous variable) and final lumen area (r=0.06) or final lesion plaque burden (r=0.17). At 18±13 months of clinical follow-up, both groups had similar rates of death and Q-wave myocardial infarction: 3.4% and 2.5% for the negative/intermediate-remodeling group versus 2.7% and 2.7% for the positive-remodeling group. However, the target-lesion revascularization (TLR) rate was 20.2% for the negative/intermediate-remodeling group versus 31.2% for the positive-remodeling group (P=0.007), and remodeling, as a continuous variable, was strongly correlated with probability of TLR (P=0.0001). By multivariable logistic regression analysis, diabetes (OR=2.3), left anterior descending artery location (OR=1.8), and remodeling (OR=5.9) were independent predictors of TLR.
Conclusions—Positive lesion-site remodeling is associated with a higher long-term TLR after a nonstent interventional procedure. Thus, long-term clinical outcome appears to be determined in part by preintervention lesion characteristics.
Key Words: angioplasty • remodeling • restenosis • ultrasonics
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