ResourcesSteps- Is the axis normal?
- Is the rhythm regular?
- What is the heart rate?
- Is there a P wave?
- If yes, what are its properties and location?
- Is it a sinus rhythm?
- What do you know about the PR interval?
- What does the QRS complex look like and what are its properties?
- Does the ST segment look alright?
- Is the T wave normal?
- Is the QT interval in the normal range? (Calculate QTc)
- Look from a distance.
- Any other abnormalities in waves, intervals or segments?
Calculation Normal ranges - P wave
- Length 1 - 3 mm = 0.04 - 0.12 s
- Amplitude 2.5 mm = 0.25 mV max.
- PQ segment
- PQ interval
- QRS complex
- 1.5 - 3 mm = 0.06 - 0.12 s
- ST segment
- 0.5 - 3 mm = 0.02 - 0.12 s
- T wave
- Length 3 - 4 mm = 0.12 - 0.16 s
- Amplitude
- 5 mm in I, II, III
- Up to 10 mm in pre-cordial
- Positive in leads I, II, aVL, V4 - V6
- QTc
- QT
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 Updating... Ċ Kieran Gillick, 30 Jan 2011, 08:57
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