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Pathology
Decrease in conduction of impulse from atria to ventricles through AV node.
Manifested as a prolonged PR interval (>02s) on ECG
Aetiology
Drug therapy e.g. beta blockade, fibrosis of conductive tissue, Lyme disease, acute rheumatic fever, aortic valve disease, sarcoidosis, myocarditis, MI, idiopathic
Signs
None
Symptoms
Usually none.
Investigations
ECG: see fig 1.8
Treatment
None required
Prognosis
Good
Key Facts
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Key Images
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Key References
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