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Can U waves be "notched"?

Vignendra Ariyarajah1, Aliasghar Khadem, David H Spodick

  • 1Division of Cardiology, Department of Medicine, St. Boniface General Hospital, University of Manitoba, Winnipeg, MB, Canada. vignendra@hotmail.com

Annals of Noninvasive Electrocardiology : the Official Journal of the International Society for Holter and Noninvasive Electrocardiology, Inc
|November 1, 2008
PubMed

Insights

Abnormal U waves, potentially bifid, were observed over 10 years despite normal Holter findings. This case explores causes of abnormal U waves and their relationship to T waves.

Area of Science:

  • Cardiology
  • Electrophysiology

Background:

  • Abnormal U waves are linked to various cardiac conditions like hypokalemia, ischemia, and hypertension.
  • Cardiac medications, particularly antiarrhythmics, can also cause U wave abnormalities.

Observation:

  • This case report details possibly bifid U waves persisting for 10 years.
  • The observation occurred despite repeatedly negative Holter monitor findings.
  • Clinical assessment revealed an absence of atrial tachyarrhythmias.

Findings:

  • The study presents a rare case of persistent, possibly bifid U waves.
  • The findings highlight the ongoing investigation into the mechanisms and U-wave-T-wave relationship.
  • Common causes of normal and abnormal U waves are discussed.

Implications:

  • This case contributes to understanding rare U wave morphologies.
  • Further research is needed to elucidate the elusive mechanisms of U-wave abnormalities.
  • The findings may prompt re-evaluation of U wave significance in clinical practice.

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