Author + information
- Maria Batsis,
- Gerald Greil,
- Animesh Tandon and
- Tarique Hussain
Background: Whole heart coronary magnetic resonance angiography (CMRA) offers detailed cardiac morphology in congenital heart disease (CHD). This imaging is performed during the cardiac rest periods. These are assessed visually using a high-temporal resolution, 4-chamber (4CH) cine. We evaluated the reproducibility of this measurement compared to a novel approach using mitral valve inflow phase contrast (MVIPC) imaging.
Methods: Consecutive patients with CHD undergoing CMRA who had both 4CH & MVIPC at 60 phases were retrospectively evaluated. Two independent observers evaluated the end-systolic & mid-diastolic intervals with both methods (Figure 1). Inter- & intra-observer variability for each method were scored, as well as CMRA quality (Scale 1 to 4; with 4 representing best quality). A linear mixed-effect model was used to compare variability between the methods & account for patient random effects & for within-patient variability.
Results: CMRAs of 25 patients were analyzed (mean age 14.76±6.3 years). The MVIPC method showed that inter-observer variability was 5.4% lower (95% CI 3.7,7.2%, p<0.0001) than the 4CH & intra-observer variability was 3.9% lower (95% CI 2.4,5.4%, p<0.0001). The time taken to determine the rest periods was equal for both methods (4CH 57.6±26.0 sec, MVIPC 52.5±36.3 sec, p=0.4). Image quality scores were comparable to the published literature (median= 3, IQR 3-4).
Conclusions: MVIPC is as fast but more reproducible than 4CH for defining cardiac rest periods for CMRA in CHD.
Poster Hall, Hall C
Saturday, March 18, 2017, 3:45 p.m.-4:30 p.m.
Session Title: Congenital Heart Disease: New Diagnostic Approaches in Congenital Heart Disease
Abstract Category: 10. Congenital Heart Disease: Pediatric
Presentation Number: 1231-017
- 2017 American College of Cardiology Foundation