Page 94 - Journal of Structural Heart Disease Volume 4, Issue 4

Meeting Abstracts
196
150.
Methods: A retrospective review (September 2014 – April 2017) was conducted of all catheterizations utilizing 3DRA performed in our congenital cardiac catheterization lab (Philips Allura Xper FD10/10, 3DRA @ 121fr/4.1second acquisition; kVp 115, mA variable). Dose area product (DAP) from 3DRA and single and biplane digital acquisi- tion (DA) runs were recorded. Fluoroscopy associated DAP was calculated: uoroscopy dose = total procedure DAP – (3DRA + DA DAP). Median DAP per case was estimated with bootstrapped 95% con dence intervals, and showed non-inferiority with benchmarks (C3PO-QI) for similar patient age and case type. When advanced dose reporting was available, the contribution of the 4 acquisition modes employed during catheterization – 3DRA, single plane DA, biplane DA, and uoroscopy – was analyzed using stan- dard statistical tests.
Results: 71 procedures incorporated 3DRA: 48 pulmonary valve implants (TPVI), 12 coarctation interventions (CoA), and 11 pulmonary artery interventions (PA). Median DAP was below the non-inferiority margin for all comparable benchmark values in TPVI and CoA intervention categories, but greater in median analysis for PA interventions in chil- dren 1-4yrs (Table 1). 25 cases had advanced dose reports and were analyzed for acquisition mode contributions
(Figure 1). These cases were not signi cantly di erent from the larger cohort in terms of procedure or dose by per- mutation test (p=0.11). Median DAP/kg was 74 mGy×m2 (95%CI 48-91). Median contributions by mode were: 3DRA 20% (IQR 13%, 32%), single plane DA 17% (IQR 6%, 34%), biplane DA 3% (IQR 0%, 16%), and uoroscopy 59% (IQR 34%, 80%).
Conclusions:
1. 3DRA accounts for a small portion of radiation dose in congenital cardiac catheterization.
2. The radiation dose associated with catheterizations uti- lizing 3DRA remains at or below benchmarks for most complex cases.
151. PERSISTENCE OF ABNORMAL VERTEBRAL ARTERIAL FLOW AFTER SUCCESSFUL COARCTATION AND SUBCLAVIAN INTERVENTION
C. Huie Lin1, Stephanie Fuentes Rojas1, Akanksha Thakkar1, Eunice Karanja1, Danish Bawa1, John Volpi1, Thomas MacGillivray1, John Breinholt2
1Houston Methodist Hospital, Houston, USA. 2UT Houston, Houston, USA
Journal of Structural Heart Disease, August 2018
Volume 4, Issue 4:114-206