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Late potentials

624 bytes added, 21:56, 22 January 2008
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New page: Late potentials are thought to be caused by early afterdepolarizations of cells in the right ventricle (in ARVD). Their amplitude is often too small to show up on a normal ECG. However...
Late potentials are thought to be caused by early afterdepolarizations of cells in the right ventricle (in [[ARVD]]). Their amplitude is often too small to show up on a normal ECG. However, when multiple QRS recordings (typically 250 consecutive QRS complexes) are averaged, random noise is filtered out and late potentials can show up.

{| style="wikitable"
! Criteria for late potentials on a signal averaged ECG
|-
| * filtered QRS duration > 114ms
* RMS voltage in the terminal 40ms < 20 µV
* low amplitude singal (LAS) duration > 38ms
* Noise should be minimal with a standard deviation of the TP segment of < 1 µV
|}

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