Late R wave transition occurs when the isoelectric chest lead is later than V4. This is also known as poor R wave progression or Clockwise Rotation. Signs of this pattern include if there isn’t a 3mm R wave by V3 or there is still a residual S wave in V6.
See also: QRS transition
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- Hampton, J and Hampton, J (2019) - The ECG Made Easy, 9th edn, Elsevier
- Thaler, MS (2003) - The Only EKG Book You'll Ever Need, 4th edn, Lippincott Williams and Wilkins