ECG (Main)

Revision as of 06:13, 5 February 2014 by Rossdonaldson1 (talk | contribs)

General

  • 1 small box = 1mm = 0.04 sec = 40 miliseconds
  • 5 small boxes = 1 big box = 5mm = 0.2 sec = 200 miliseconds
  • Entire ECG strip is ~10 seconds

Rhythms

Intervals

Interval Time (s) Boxes
PR 0.12 - 0.20 3-5
QRS .06 - 0.10 1.5-2.5
QTc <0.44 N/A

Segments

Axis

  • Cannot be measured if BBBs are present
  • If up in leads 1 and AVF then normal axis

Waves

Hypertrophy/Enlargement

Blocks

Low ECG Voltage

See Also

Source

  • Adapted from Niemann, Lampe, Pani, Donaldson, ECGpedia.org
  • Journal of Electrocardiology. Vol 43 (2010). 40-42.