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Summary

Description
English: QT interval corrected by heart rate, according to Bazett's formula,[1] Fridericia's formula,[2] and subtracting 0.02 s from QT for every 10 bpm increase in heart rate.[3] Up to 0.42 s (≤420 ms) is chosen as normal QTc of QTB and QTF in this diagram.[4]
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References

  1. Bazett HC. (1920). "An analysis of the time-relations of electrocardiograms". Heart (7): 353–370.
  2. Fridericia LS (1920). "The duration of systole in the electrocardiogram of normal subjects and of patients with heart disease". Acta Medica Scandinavica (53): 469–486.
  3. Lesson III. Characteristics of the Normal ECG Frank G. Yanowitz, MD. Professor of Medicine. University of Utah School of Medicine. Retrieved on Mars 23, 2010
  4. Dr Dean Jenkins and Dr Stephen Gerred. A normal adult 12-lead ECG. ecglibrary.com. Retrieved on Jan 28, 2018
Author

Mikael Häggström.

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  • By Mikael Häggström, used with permission.

Licensing

Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
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I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

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24 March 2010

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Date/TimeThumbnailDimensionsUserComment
current11:51, 23 December 2021Thumbnail for version as of 11:51, 23 December 20211,231 × 879 (138 KB)Mikael Häggströmbpm
11:47, 23 December 2021Thumbnail for version as of 11:47, 23 December 20211,231 × 900 (138 KB)Mikael HäggströmLess risk of misunderstanding
23:01, 28 June 2012Thumbnail for version as of 23:01, 28 June 20121,231 × 879 (103 KB)Mikael HäggströmRecolored
22:59, 28 June 2012Thumbnail for version as of 22:59, 28 June 20121,231 × 879 (103 KB)Mikael HäggströmColored
22:36, 28 June 2012Thumbnail for version as of 22:36, 28 June 20121,231 × 879 (84 KB)Mikael HäggströmHorizontal compression
22:07, 28 June 2012Thumbnail for version as of 22:07, 28 June 20121,254 × 754 (73 KB)Mikael HäggströmExpanded and formatted y-axis
11:38, 9 December 2010Thumbnail for version as of 11:38, 9 December 2010784 × 444 (37 KB)Mikael HäggströmExtended
05:06, 25 March 2010Thumbnail for version as of 05:06, 25 March 2010704 × 422 (37 KB)Mikael Häggströmcontrasted
16:01, 24 March 2010Thumbnail for version as of 16:01, 24 March 2010704 × 422 (37 KB)Mikael Häggströmcompleted
15:55, 24 March 2010Thumbnail for version as of 15:55, 24 March 2010684 × 425 (36 KB)Mikael Häggström{{Information |Description={{en|1=g}} |Source={{own}} |Author=Mikael Häggström |Date=g |Permission= |other_versions= }}

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