Abstract
Background
Recently, the R-wave peak time (RWPT) at lead II was reported to be a helpful and
simple tool for differentiating wide QRS complex tachycardias with a RWPT ≥ 50 ms for ventricular tachycardia diagnosis. Our previous study showed that the duration
of RWPT at lead II in adults was ≈29 ms. However, the effects of ventricular premature beats (VPBs), bundle branch block
(BBB) or left anterior fascicular block (LAFB) on RWPT at lead II remain unknown.
Methods
The study was conducted in the First Affiliated Hospital of Shantou University Medical
College in Southern China. Adults with VPBs, BBB or LAFB were included. RWPT at lead
II was determined.
Results
Compared with the control groups, the right BBB, LAFB, RWPT were longer in groups
with left BBB and VPBs. Compared with the group with left BBB, the group with VPBs
had a significantly longer RWPT at lead II (54.20 ± 18.52 versus 84.76 ± 16.38 ms, P < 0.01).
Conclusion
Our study showed that there is a significant difference in the RWPT at lead II between
groups with left BBB, ventricular premature beat, right BBB and LAFB. A RWPT of 50 ms may be optimal to differentiate between ventricular tachycardia and supraventricular
tachycardia with right left BBB and LAFB, but not with left BBB.
Key Indexing Terms
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Article info
Publication history
Published online: September 26, 2017
Accepted:
August 28,
2017
Received in revised form:
August 11,
2017
Received:
March 26,
2017
Footnotes
The first 2 authors (MT, TC) contributed equally to the work.
☆The authors have no conflicts of interest to disclose.
☆☆This work was supported in part by the National Natural Science Foundation of China (No. 81473063).
Identification
Copyright
© 2017 Southern Society for Clinical Investigation. Published by All rights reserved.
