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P Wave Morphology: Difference between revisions
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[[Image:Normaal ecg.jpg|thumb| An example of normal sinus rhythm.]] | [[Image:Normaal ecg.jpg|thumb| An example of normal sinus rhythm.]] | ||
[[Image:Nsr.jpg|thumb| Another example of normal sinus rhythm.]] | [[Image:Nsr.jpg|thumb| Another example of normal sinus rhythm.]] | ||
Characteristics of a normal p wave:<cite>Spodick</cite> | {| class="Wikitable" | ||
! Characteristics of a normal p wave:<cite>Spodick</cite> | |||
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*The maximal height of the P wave is 2.5 mm in leads II and / or III | *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 is positive in II and AVF, and bifasic in V1 | ||
*The p wave duration is usually shorter than 0.12 seconds | *The p wave duration is usually shorter than 0.12 seconds | ||
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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]]. | 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]]. | ||