ENDOVASCULAR INTERVENTIONS FOR CHILDHOOD TAKAYASU ARTERITIS: A 16-YEAR REVIEW

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Objective: Evidence-based studies on endovascular approaches for childhood Takayasu arteritis(c-TA) are limited. This study presented the real-world scenario of largest cohort up-to-date for c-TA patients undergoing interventions and their post-interventional outcomes. Design and method: Patients with c-TA satisfying the 1990 ACR or 2010 EULAR/PRINTO/PReS criteria were recruited from January 2002 to December 2017. Data on clinical, laboratory, imaging features, treatment and post-interventional outcomes were collected. Statistical analysis was performed based on data distribution. Complication-free survival and Re-intervention-free survival were projected by Kaplan-Meier methods and compared by Log-rank tests. Associated factors for intervention (or stenting) and predictors for post-interventional complications (or re-interventions) were assessed via Logistic regression and COX regression models, respectively. Results: Among 101 patients enrolled, 69(68.3%) underwent 121 interventions (Angioplasty 95; Stenting 26) during a median 3.1 years of follow-up. Compared with the medical treatment group, the intervention group appeared with fewer male population(18.8% vs 39.3%, OR = 0.2, p = 0.017) and more type IV disease(47.8% vs. 17.9%, OR = 10.60, p = 0.002). Male sex also indicated the risk for re-intervention(HR = 4.72, p = 0.016). Retinopathy(OR = 4.8, p = 0.027), time of delay in diagnosis per year(OR = 1.76, p = 0.016) and descending thoracic aorta involvement(OR = 10.19, p = 0.003) associated with stent insertion. Hypertension secondary to renal artery(59.4%) or mid-aorta(14.5%) stenosis, heart failure(21.7%), claudication(21.7%) served as leading clinical hints for interventions. Anti-inflammatory and anti-platelet therapies covered 89.9% and 91.3% patients, respectively. The technical success rate was 96.7%. Over median 2.88 years since intervention, 36 lesions occurred complications in 28 patients and 22 lesions in 17 patients, majorly on renal artery or mid-aorta. The 5-year complication-free and re-intervention survivals were 50.7% and 65.8%, separately. Dual antiplatelet therapy(HR = 0.28, p = 0.011), concurrent surgery(HR = 14.84, p = 0.002), retinopathy secondary to hypertension(HR = 3.54, p = 0.004), and pulmonary artery hypertension(HR = 3.0, p = 0.024) were independent predictors for complications. Conclusions: Over two-thirds c-TA patients require interventions and the 5-year complication-free survival is 50.7%. Male sex, retinopathy, and pulmonary artery hypertension alert unfavorable outcomes. Dual anti-platelet therapy appears to protect c-TA patients from post-interventional complications. Endovascular approaches can be a choice for mid-aorta and/or renal artery lesions caused by c-TA.