P Wave Morphology: Difference between revisions

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The '''P wave morphology''' can reveal right or left atrial stretch or atrial arrhythmias and is best determined in leads II and V1 during sinus rhythm.
The '''P wave morphology''' can reveal right or left atrial stretch 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 bifasic in V1
*The p wave duration is shorter than 0.12 seconds
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! Characteristics of a normal p wave:<cite>Spodick</cite>
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| |[[Image:Normaal ecg.jpg|thumb|center|300px|An example of normal sinus rhythm.]]
*The maximal height of the P wave is 2.5 mm in leads II and / or III
| |[[Image:Nsr.jpg|300px|thumb|center}Another example of normal sinus rhythm.]]
*The p wave is positive in II and AVF, and bifasic in V1
*The p wave duration is usually shorter than 0.12 seconds
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==The abnormal P wave==
==The abnormal P wave==


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If the P wave is inverted, it is most likely an [[ectopic atrial rhythm]] not originating from the sinus node.
If the P wave is inverted, it is most likely an [[ectopic atrial rhythm]] not originating from the sinus node.
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| | [[Image:normalSR.jpg|thumb|center|300px| Normal sinus rhythm with a positive p wave in leads I, II en AVF and a biphasic p wave in V1.]]
| | [[Image:p_wave_morphology.png|center|thumb|300px|Altered P wave morfology is seen in left or right atrial enlargement.]]
| | [[Image:p_wave_morphology.png|center|thumb|300px|Altered P wave morfology 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.]]
| | [[Image:pta_changes.svg|thumb|center|300px|The PTa segment can be used to diagnose pericarditis or atrial infarction.]]
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==Examples==
 
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<gallery>
Image:Normaal ecg.jpg|An example of normal sinus rhythm.
Image:Nsr.jpg|Another example of normal sinus rhythm.
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==References==
==References==