Heart Failure, Systolic Clinical Trial
Official title:
Can Offsite Expert Accurately Estimate the Ejection Fraction by Watching and Instructing the Onsite Novice Sonographer's Practice Via the Social Network System?
Background: Given that an experienced physician is not always available 24 hours a day,
immediately and always available echocardiography is usually impossible in the emergency
department (ED) and intensive care unit (ICU). To compensate this limitation, the
investigators have investigated that offsite expert guided, inexperienced
practitioner-performed ultrasonography could be effectively performed. In this study, the
investigators aimed to investigate whether the offsite expert can effectively evaluate the
visually estimated ejection fraction (EF) while watching and guiding the echocardiographic
procedure of onsite novice examiner using the social network video calling chat.
Methods: sixty patients presenting to the ICU and requiring echocardiography will be
included. Sixty novice practitioners without any previous experience of echocardiography
will participate. Prior to their procedure, the onsite expert complete the echocardiography
in advance and determine the EF using the modified Simpson's method (MSM, Reference value).
Then, the novice physicians perform the echocardiography again with the offsite expert's
guidance via video call. They obtain parasternal long and short axis view and EF is visually
estimated to the nearest 5% (ex. 40%, 45% and etc) by the offsite expert while watching the
ultrasound video on the smartphone display. The subjects requiring immediate management due
to severe symptoms were excluded in this study. Interobserver variability between the
calculated by onsite expert and visually estimated by offsite expert was assessed. The
agreement of the visual estimated EF obtained by onsite expert and offsite expert via
smartphone was evaluated by linear regression and Bland-Altman plots.
n/a
Observational Model: Cohort, Time Perspective: Prospective
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