Late potentials: Difference between revisions
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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. Such a recording is called a Signal Averaged ECG (SAECG). | 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. Such a recording is called a Signal Averaged ECG (SAECG). | ||
The ARVD taskforce has published a document with [http://arvd.org/SAECG%20protocol.pdf recommended settings] to record an SAECG in ARVD. | |||
[[Image:late_potentials.png|thumb]] | [[Image:late_potentials.png|thumb]] | ||
{| class="wikitable" | {| class="wikitable" | ||
Latest revision as of 11:27, 23 March 2011
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. Such a recording is called a Signal Averaged ECG (SAECG). The ARVD taskforce has published a document with recommended settings to record an SAECG in ARVD.
| Criteria for late potentials on a signal averaged ECG simsonBreithardt |
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References
<biblio>
- simson pmid=7249291
- Breithardt pmid=2007727
</biblio>