P Wave Morphology: Difference between revisions

P Wave Morphology (view source)

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 {{clr}}
-===Left atrial enlargement===
-;Criteria for left atrial voor left atrial enlargement. Either
-:P wave with a broad (>0,04 sec or 1 small square) and deeply negative (>1 mm) terminal part in V1
-:P wave duration >0,12 sec in laeds I and / or II
-[[Image:left_atrial_enlargement.jpg|thumb| Left atrial enlargement]]
-[[Image:LAE_2.png|thumb| Left atrial enlargement with ECG.]]
-[[Image:ECG_LAtrD_v1.jpg|thumb| Left atrial enlargement as seen in lead V1.]]
-Left atrial enlargement is often seen in mitral valve insufficiency, resulting in backflow of blood from the left ventricle to the left atrium and subsequent incresed local pressure.
-{{clr}}
-===Right atrial enlargement===
-;Right atrial enlargement is defined as either:
-:P >2,5 mm in II / III and / or aVF
-:P >1,5 mm in V1.
-[[Image:right_atrial_enlargement.jpg|thumb|  Right atrial enlargement]]
-[[Image:Rae.png|thumb| Right atrial enlargement]]
-Right atrial enlargement can result from increased pressure in the pulmonary artery, e.g. after pulmonary embolisation. A positive part of the biphasic p-wave in lead V1 larger than the negative part indicates right atrial enlargement. The width of the p wave does not change.
-{{clr}}
-===Biatrial enlargement===
-;Biatrial enlargement
-:Biphasic p wave in V1 of more than 0.04 sec duration. The positive initial part is > 1.5mm and the negative terminal part > 1mm
-In biatrial enlargement is the ECG whos signs of both left and right atrial enlargement. In V1 the p wave has large peaks first in positive and later in negative direction.
 ==Referenties==