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. 2025 Jul;40(4):687-688.
doi: 10.3904/kjim.2024.372. Epub 2025 May 21.

Beat-to-beat alternans

Chan-Hee Lee  1 , Melvin M Scheinman  2
Affiliations

Beat-to-beat alternans

Chan-Hee Lee et al. Korean J Intern Med. 2025 Jul.
No abstract available

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Conflict of interest statement

Conflicts of interest

The authors disclose no conflicts.

Figures

Figure 1.
Figure 1.
(A) The electrocardiogram strip shows a prolonged QT interval and frequent premature ventricular contractions (blue dots), which set up long-short sequences that initiated episodes of torsades. (B) The follow-up electrocardiogram revealed giant negative T-waves with a markedly prolonged QT interval. Note the beat-to-beat macroscopic T-wave alternans with an alternating change in the QT interval (red and blue bars).
See this image and copyright information in PMC

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