U Wave

Aka: U Wave, EKG U Wave

advertisement

II. Definitions

  1. U Wave
    1. EKG variably present wave occurring between the T and P Waves
    2. May represent delayed repolarization of the bundle branches or Purkinje Fibers

III. Findings: Normal

  1. U Wave has same polarity as T Wave
  2. U Wave best seen in precordial leads (esp. lead V3) at slow Heart Rates

IV. Causes: Prominent U Wave

  1. Hypokalemia
    1. In Hypokalemia, may also appear as a biphasic T Wave in V1-3

V. Causes: Inverted U Wave (V2 to V5)

  1. Myocardial Ischemia
  2. Myocardial strain pattern
  3. Hypertension

VI. Causes: Increased U Wave amplitude

  1. Digoxin (Digitalis)
  2. Quinidine
  3. Hypercalcemia
  4. Epinephrine
  5. Thyrotoxicosis

VII. References

  1. Berberian (2024) Crit Dec Emerg Med 38(10): 13
  2. Mattu (2017) Crit Dec Emerg Med 31(3): 11

Images: Related links to external sites (from Bing)

These images are a random sampling from a Bing search on the term "U Wave." Click on the image (or right click) to open the source website in a new browser window. Search Bing for all related images

Related Studies

Related Topics in Examination

advertisement