P Wave Morphology: Difference between revisions
Jump to navigation
Jump to search
(New page: {{ActiveDiscuss}} Aan de P top is te zien of er sprake is van rechter of linker atriumbelasting. De morfologie van de P-top wordt vastgesteld in afleiding II en V1, wanneer tenminste sp...) |
|||
(49 intermediate revisions by 8 users not shown) | |||
Line 1: | Line 1: | ||
{{ | {{nav| | ||
|previouspage=Heart axis | |||
|previousname=Step 4:Heart axis | |||
|nextpage=QRS morphology | |||
|nextname=Step 6: QRS morphology | |||
}} | |||
= | {{authors| | ||
[[ | |mainauthor= [[user:Drj|J.S.S.G. de Jong, MD]], A. Bouhiouf, Msc | ||
|supervisor= | |||
|coauthor= | |||
|moderator= [[user:Drj|J.S.S.G. de Jong, MD]] | |||
|editor= | |||
}} | |||
<div style="float:left"> | |||
__TOC__ | |||
</div> | |||
{{clr}} | {{clr}} | ||
==The Normal P wave== | |||
{{box| | |||
The '''P wave morphology''' can reveal right or left atrial hypertrophy or atrial arrhythmias and is best determined in leads II and V1 during sinus rhythm. | |||
'''Characteristics of a normal p wave:'''<cite>Spodick</cite> | |||
*The maximal height of the P wave is 2.5 mm in leads II and / or III | |||
*The p wave is positive in II and AVF, and biphasic in V1 | |||
*The p wave duration is shorter than 0.12 seconds | |||
[[ | }} | ||
[[ | <div align="left"> | ||
{| class="wikitable" | |||
|- | |||
| |[[Image:Normaal ecg.jpg|thumb|center|300px|An example of normal sinus rhythm.]] | |||
| |[[Image:Nsr.jpg|300px|thumb|center}Another example of normal sinus rhythm.]] | |||
|} | |||
</div> | |||
==The Abnormal P wave== | |||
Elevation or depression of the [[PTa segment]] (the part between the p wave and the beginning of the QRS complex) can result from [[Ischemia#Atrial infarction|atrial infarction]] or [[Clinical Disorders#Pericarditis|pericarditis]]. | |||
If the p-wave is enlarged, the [[Chamber_Hypertrophy_and_Enlargment#Left_atrial_enlargement|atria are enlarged]]. | |||
[[ | |||
== | If the P wave is inverted, it is most likely an [[ectopic atrial rhythm]] not originating from the sinus node. | ||
<div align="left"> | |||
{| class="wikitable" | |||
|- | |||
| | |||
{| | |||
|- | |||
| | [[Image:p_wave_morphology.png|center|thumb|300px|Altered P wave morphology is seen in left or right atrial enlargement.]] | |||
| | [[Image:pta_changes.svg|thumb|center|300px|The PTa segment can be used to diagnose pericarditis or atrial infarction.]] | |||
|} | |||
|} | |||
</div> | |||
== | {{box| | ||
==References== | |||
<biblio> | <biblio> | ||
#Spodick pmid=1575201 | #Spodick pmid=1575201 | ||
</biblio> | </biblio> | ||
}} | |||
[[Category:ECG Course]] |
Latest revision as of 08:39, 12 January 2011
«Step 4:Heart axis | Step 6: QRS morphology» |
Author(s) | J.S.S.G. de Jong, MD, A. Bouhiouf, Msc | |
Moderator | J.S.S.G. de Jong, MD | |
Supervisor | ||
some notes about authorship |
The Normal P wave
The P wave morphology can reveal right or left atrial hypertrophy or atrial arrhythmias and is best determined in leads II and V1 during sinus rhythm.
Characteristics of a normal p wave:[1]
- The maximal height of the P wave is 2.5 mm in leads II and / or III
- The p wave is positive in II and AVF, and biphasic in V1
- The p wave duration is shorter than 0.12 seconds
The Abnormal P wave
Elevation or depression of the PTa segment (the part between the p wave and the beginning of the QRS complex) can result from atrial infarction or pericarditis.
If the p-wave is enlarged, the atria are enlarged.
If the P wave is inverted, it is most likely an ectopic atrial rhythm not originating from the sinus node.