Abstract TP407: Transvenous Pressure Monitoring Guides Endovascular Treatment of Vein of Galen Malformation

Background: Vein of Galen Malformation (VGM) is a complex vascular disorder with high morbidity and mortality. Mainstay management involves staged endovascular embolizations. Determining when to stop an embolization during any single intervention is challenging. If embolization is excessive, it precipitates thrombosis on the VGM, increase in cardiac post-load, and worsening on heart failure, as well as hemorrhages. Conversely, insufficient embolization may be futile. We report the use of transvenous pressure monitoring as an adjuvant for guiding the extent of embolization.

Method: Arterial and venous accesses were obtained through the common femoral artery and vein, respectively. After diagnostic angiography, the best working projection was selected in early and late venous phases. A microcatheter was placed at the VG, and an intermediate 5 Fr. catheter was located at the persistent falcine sinus. The microcatheter was used for coil embolization, while the intermediate catheter provided support and was connected for continuous venous pressure monitoring. Continuous arterial pressure monitoring was obtained via an A-line and transduction of a glide catheter located in the carotid artery. Arterial and venous SBP were recorded.

Result: Serial angiograms during treatment showed reduction of flow within the VGM. Concomitantly, there was an increase in the A-V-gradient over time (Figure 1). The difference between the A-V SBP went from 36 mmHg at the start of the case to 51 mmHg after the final coil. The average pressure gradient went from 38.3 mmHg in the first quarter to 43.5 mmHg in the last.

Conclusion: The continuous assessment of transvenous pressure monitoring during embolization of VGM provides measurable changes that correlate with degree of flow. This quantifiable metric may be used as an adjunct to guide adequate reduction of flow during endovascular treatment of VGM.

Abstract TP411: Improving Pediatric Stroke Recognition Among Pediatric Health Care Providers

Introduction: Pediatric acute ischemic stroke (P-AIS) is an under-recognized disease by pediatric healthcare providers, resulting in delay of its diagnosis. In spite of diagnostic tools such as the FAST and BE FAST mnemonics, lack of awareness leads to increased morbidity and mortality. This study aims to elucidate whether a brief educational activity would modify the identification and perception of P-AIS.

Methods: Forty-nine pediatric healthcare providers were surveyed to assess their baseline skills in recognizing P-AIS. Providers attended a 30-minute activity outlining incidence, natural history, diagnosis, and examples of P-AIS treatment. The mnemonics “FAST” and “BE FAST” as applicable to children were futher expounded. Pre and post-surveys assessed providers’ profession, type of practice, ED service involvement, familiarity with the mnemonics, and P-AIS recognition performance for infants and children.

Results: The forty-nine pediatric healthcare providers surveyed had the following degrees: 61% MD, 20% NP, 6% RN, 6% student, 4% PA, 2% DO. Futhermore, 78% work in private outpatient enviroments, 17% in academic outpatient institutions, 4% in private outpatient settings, and only 10% had emergency department involvement. Pre-Activity: 53% had heard of “FAST,” and 8% had heard of “BE FAST.” Correct knowledge of individual letters ranged between 12-39%, with the lowest recognition rates for “B” and “E.” At baseline, 65% of providers correctly recognized pediatric and specifically infant stroke cases. Post-Activity: 97% felt familiar with “BE FAST.”. Correct knowledge of individual letters following the educational activity improved to 100%. 95% of providers correctly recognized P-AIS, and 95% correctly identified infant stroke. Univariate logistic analysis showed that completing the training activity was the only significant factor improving the ability to identify P-AIS (OR: 10.35, CI: 2.2 to 48.2). Profession and type of practice were not significant.

Conclusion: A 30-minute focused educational activity was sufficient to improve the perception and ability to recognize P-AIS among different levels of healthcare providers. The long-term effects of these interventions should be examined.