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- Document 0543
- DOCN M9620543
- TI Predictive model to assess risk for cardiac allograft vasculopathy: an
- intravascular ultrasound study.
- DT 9602
- AU Mehra MR; Ventura HO; Chambers R; Collins TJ; Ramee SR; Kates MA; Smart
- FW; Stapleton DD; Department of Internal Medicine, Ochsner Medical
- Institutions,; New Orleans, Louisiana 70121, USA.
- SO J Am Coll Cardiol. 1995 Nov 15;26(6):1537-44. Unique Identifier :
- AIDSLINE MED/96060951
- AB OBJECTIVES: This study was performed to assess the influence and
- interdependence of immunologic and nonimmunologic risk factors in the
- development of cardiac allograft vasculopathy. Another primary objective
- was to establish a clinically useful model for risk assessment of
- cardiac allograft vasculopathy that would facilitate identifying those
- heart transplant recipients likely to have severe intimal proliferation
- and thereby at greater risk for adverse clinical events. BACKGROUND: To
- our knowledge, no comprehensive intravascular ultrasound study has
- assessed the relative influences of both nonimmunologic and immunologic
- factors in the development of cardiac allograft vasculopathy, currently
- the major limitation to long-term cardiac allograft survival. METHODS:
- Using a computer-assisted model of stepwise logistic regression,
- immunologic and nonimmunologic risk factors were evaluated to help
- identify the development of severe intimal thickening in 101 subjects
- who underwent intravascular ultrasound. Prospective validation of the
- findings was performed in a separate consecutive cohort of 37 heart
- transplant recipients, and the accuracy of this model to predict a
- relative risk > 1 for the development of severe intimal hyperplasia was
- assessed. RESULTS: Significant independent predictors of severe intimal
- hyperplasia in this model included a donor age > 35 years, a first-year
- mean biopsy score > 1 (a measure not only of severity of rejection, but
- also of frequency of insidious rejection) and hypertriglyceridemia at
- two incremental levels of risk (150 to 250 mg/dl [1.70 to 2.83
- mmol/liter] and > 250 mg/dl [2.83 mmol/liter]). Based on the absence (0)
- or presence (1) of these factors, 12 individual categories of risk were
- ascertained with increasing relative risks and predicted probabilities
- for severe intimal hyperplasia. Prospective validation of this model
- revealed a sensitivity and specificity of 70% and 90%, respectively, and
- the positive and negative predictive values were 85% and 80%,
- respectively. Additionally, subjects with severe intimal thickening had
- a four-fold higher cardiac event rate than those without severe intimal
- proliferation on intravascular ultrasound. CONCLUSIONS: This study
- establishes a clinically useful predictive model that can be applied to
- individual heart transplant recipients to assess their risk for
- developing significant cardiac allograft vasculopathy and, thus, aids in
- the identification of patients at risk for cardiac events in whom closer
- surveillance and risk factor modification may be warranted.
- DE Adult Aged Confounding Factors (Epidemiology) Coronary
- Vessels/*PATHOLOGY/*ULTRASONOGRAPHY Death, Sudden, Cardiac/ETIOLOGY
- Female Graft Rejection/IMMUNOLOGY Heart Transplantation/*ADVERSE
- EFFECTS/IMMUNOLOGY/PATHOLOGY/ *ULTRASONOGRAPHY Human
- Immunosuppression Logistic Models Male Middle Age Myocardial
- Infarction/ETIOLOGY Predictive Value of Tests Prospective Studies
- Risk Factors Sensitivity and Specificity Transplantation, Homologous
- Tunica Intima/PATHOLOGY/ULTRASONOGRAPHY JOURNAL ARTICLE
-
- SOURCE: National Library of Medicine. NOTICE: This material may be
- protected by Copyright Law (Title 17, U.S.Code).
-
-