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Session: Poster Session 1 (Even numbers)
Session starts: Thursday 26 January, 16:00
Presentation starts: 16:00

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Frederique de Raat (TU/e)

Abstract:
Background: Bedside quantification of stroke volume (SV) and left ventricular ejection fraction (LVEF) is valuable in hemodynamically compromised patients. Miniaturized, battery operated handheld ultrasound (HAND) devices are now available for clinical use. However, the performance level of HAND devices for quantified cardiac assessment is yet unknown. The aim of this study was to compare the validity of HAND measurements with Standard Echocardiography (SE) and three-dimensional echocardiography (3DE). Methods: Thirty-six patients were scanned with HAND, SE and 3DE. The image quality of HAND and SE was evaluated by scoring segmental endocardial border delineation (2=good, 1=poor, 0=invisible). LVEF and SV of HAND was evaluated against SE and 3DE using correlation and Bland-Altman analysis. HAND and SE datasets were analysed automatically with Auto Strain. The 3DE dataset was analysed with the Dynamic Heart Model. Results: The correlation, bias, and Limits Of Agreement (LOA) between SE and HAND were 0.68 [0.46:0.83], 1.60% [-2.18:5.38], and 8.84% [-9.79:12.99] for LVEF, and 0.91 [0.84:0.96], 1.32 ml [-0.36:4.01], 15.54 ml [-18.70:21.35] for SV, respectively. Correlation, bias, and Limits Of Agreement (LOA) between HAND and 3DE were 0.55 [0.6:0.74], -0.56% [-2.27:1.1], and 9.88% [-13.29:12.17] for LVEF, and 0.79 [0.62:0.89], 6.78 ml [2.34:11.21], 12.14 ml [-26.32:39.87] for SV, respectively. The image quality scores were 10.49 ± 1.7 for the apical four chamber views for the SE dataset and 9.42 ± 2.0 for the HAND dataset (P < 0.001). Conclusion: Clinically acceptable accuracy, precision, and image quality was demonstrated for HAND measurements compared to SE. Also, LVEF quantification with HAND was interchangeable with 3DE.