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QRS axis: Difference between revisions
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→Examples of a left heartaxis
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[[Image:LHA.png|thumb| Left heartaxis]] | [[Image:LHA.png|thumb| Left heartaxis]] | ||
[[Image:LAHB.png|thumb| Left anterior hemi block]] | [[Image:LAHB.png|thumb| Left anterior hemi block]] | ||
Causes of left axis deviation include: | |||
*Normal variation (physiologic, often with age) | |||
*Mechanical shifts, such as expiration, high diaphragm (pregnancy, ascites, abdominal tumor) | |||
*[[Hypertrophy|Left ventricular hypertrophy]] | |||
*[[LBBB|Left bundle branch block}} | |||
*[[Conduction delay#LAFB| left anterior fascicular block]] | *[[Conduction delay#LAFB| left anterior fascicular block]] | ||
*Congenital heart disease (e.g. atrial septal defect) | |||
*Emphysema | |||
*[[Hyperkalemia]] | |||
*Ventricular ectopic rhythms | |||
*Preexcitation syndromes | |||
*[[Ischemia#Inferior|Inferior myocardial infarction]] | *[[Ischemia#Inferior|Inferior myocardial infarction]] | ||
*Pacemaker rhythm | *Pacemaker rhythm | ||
{{clr}} | {{clr}} | ||