Orderly display of limb lead ECGs raises Chinese intern’s diagnostic accuracy when determining frontal plane QRS axis
Li, G., Banarsee, K., Laukkanen, J., & Hao, L. (2019). Orderly display of limb lead ECGs raises Chinese intern’s diagnostic accuracy when determining frontal plane QRS axis. Medical Education Online, 24(1), Article 1549923. https://doi.org/10.1080/10872981.2018.1549923
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Medical Education OnlineDate
2019Copyright
© 2018 The Author(s)
Background: There is limited information on whether the orderly display of limb lead ECGs (electrocardiograms)
can facilitate students to determine frontal plane QRS complex wave electrical axis.
Objectives: The study investigated whether the orderly display of limb lead ECGs can raise
Chinese undergraduate intern’s diagnostic accuracy when determining frontal plane axis.
Design: A total of 147 fifth-year undergraduate interns aged between 21 and 25 years were
randomly arranged into 2 groups: one group was given classically displayed ECGs of limb
leads while the other group was given orderly displayed ECGs of limb leads. They were then
taught to determine frontal plane axis with one of the above displays. The intern’s diagnostic
accuracy and time used were measured.
Results: After teaching, the orderly display can more effectively raise diagnostic accuracy when
determining axis as compared to the classical display (76.65 ± 23.16% vs. 68.88 ± 23.21%,
P < 0.05), although diagnostic accuracy in axis determination was improved in both groups as
compared to the axis determination at baseline (all P < 0.05).
Conclusions: Orderly display of limb lead ECGs may raise Chinese intern’s diagnostic accuracy
when determining frontal plane axis.
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