Lesson plan
U wave
The U wave is a wave on an electrocardiogram (ECG). It comes after the T wave of ventricular repolarization and may not always be observed as a result of its small size. 'U' waves are thought to represent repolarization of the Purkinje fibers. However, the exact source of the U wave remains unclear. The most common theories for the origin are: * Delayed repolarization of Purkinje fibers * Prolonged re-polarisation of mid-myocardial M-cells * After-potentials resulting from mechanical forces in the ventricular wall * The repolarization of the papillary muscle.
Article summary
The U wave is a wave on an electrocardiogram (ECG). It comes after the T wave of ventricular repolarization and may not always be observed as a result of its small size. 'U' waves are thought to represent repolarization of the Purkinje fibers. However, the exact source of the U wave remains unclear. The most common theories for the origin are: * Delayed repolarization of Purkinje fibers * Prolonged re-polarisation of mid-myocardial M-cells * After-potentials resulting from mechanical forces in the ventricular wall * The repolarization of the papillary muscle.
Key claims
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
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Key claims and bibliography are generated from the same tracked claims and sources as the article page.