Artery Research

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Volume 20, Issue C, December 2017, Pages 97 - 97

P144 ASCENDING AND DESCENDING THORACIC AORTA PU-LOOPS FOR THE ESTIMATION OF LEFT VENTRICULAR AFTERLOAD

Authors
Alex Hong1, 2, Jona Joachim1, 3, 4, Cedric Buxin1, Sandrine Millasseau5, Arthur Le Gall1, 3, 4, 2, Joaquim Mateo1, Etienne Gayat1, 2, 6, Fabrice Vallée1, 3, 4
1St – Louis – Lariboisière – Fernand Widal University Hospitals, Dept of Anaesthesiology & Intensive Care – Le Temple, Paris, France
2UMR-S 942 INSERM, Lariboisière Hospital, France
3M3DISIM – Inria, Université Paris-Saclay, France
4LMS, Ecole Polytechnique, CNRS, Université Paris – Saclay, France
5Pulse Wave Consulting, Saint Leu La Foret, France
6Paris Diderot University, Sorbonne Paris Cité, France
Available Online 6 December 2017.
DOI
10.1016/j.artres.2017.10.156How to use a DOI?
Abstract

Introduction: Pressure-Velocity (PU) loops obtained in the descending thoracic aorta (PU-loopsdes) could estimate left ventricular afterload with two remarkable angles: β and GALA (Global Afterload Angle) [1].The aim of this study is to compare PU-loops measured in the ascending aorta (PU-loopsasc) versus PU-loopsdes.

Methods: This study was conducted in patients scheduled for elective interventional neuroradiology. During the procedure, we measured pressures at two different sites:(1) in the ascending aorta where we obtained a transthoracic echocardiogram (TEE) concomitantly to measure ascending aortic blood velocity, (2) in the descending thoracic aorta where blood velocity was obtained using a trans-esophageal Doppler probe. Patients were divided into high risk (HR) and low risk (LR) groups based on their cardiovascular risk factors.

Results: Twenty five patients were included (13 HR, 12 LR). We observed a significant increase in both β and GALA angles between PU-loopsasc and PU-loopsdes (from 7° [0–15] to 13° [5–20] and from 30° [23–37] to 41° [29–54], p < 0.01 respectively). This increase was more marked in the HR group compared to the LR group (p < 0.05) (Fig 1). Just like in PU-loopsdes, we found that β and GALA angles in PU-loopsasc could also discriminate between LR and HR patients (3° [0.4–6] vs 17° [9–25] and 24° [22–26] vs 38° [34–43], p < 0.01 respectively).

Conclusion: PU-loopsasc had lower β and GALA angles compared to PU-loopsdes. However, GALA could discriminate between high and low cardiovascular risk patients in both sites.

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This is an open access article distributed under the CC BY-NC license.

References

1.F Vallée et al., Beat-by-beat assessment of cardiac afterload using descending aortic velocity–pressure loop during general anesthesia: a pilot study, Journal of Clinical Monitoring and Computing, 20 Jan 2017.
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Journal
Artery Research
Volume-Issue
20 - C
Pages
97 - 97
Publication Date
2017/12/06
ISSN (Online)
1876-4401
ISSN (Print)
1872-9312
DOI
10.1016/j.artres.2017.10.156How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

risenwbib
TY  - JOUR
AU  - Alex Hong
AU  - Jona Joachim
AU  - Cedric Buxin
AU  - Sandrine Millasseau
AU  - Arthur Le Gall
AU  - Joaquim Mateo
AU  - Etienne Gayat
AU  - Fabrice Vallée
PY  - 2017
DA  - 2017/12/06
TI  - P144 ASCENDING AND DESCENDING THORACIC AORTA PU-LOOPS FOR THE ESTIMATION OF LEFT VENTRICULAR AFTERLOAD
JO  - Artery Research
SP  - 97
EP  - 97
VL  - 20
IS  - C
SN  - 1876-4401
UR  - https://doi.org/10.1016/j.artres.2017.10.156
DO  - 10.1016/j.artres.2017.10.156
ID  - Hong2017
ER  -