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Pathology
Complete AV dissociation, impulses from atria cannot be conducted to ventricles
Aetiology
Drug therapy e.g. beta blockade, fibrosis of conductive tissue, Lyme disease, acute rheumatic fever, aortic valve disease, sarcoidosis, myocarditis, MI, idiopathic
Signs
Bradycardia, hypotension
Symptoms
Can be asymptomatic, SOB, chest pain, pre-syncope/syncope
Investigations
ECG: No association between p-waves and ventricular conduction
Echo: To assess for any structural abnormalities
Treatment
Stop offending drugs
A temporary pacing wire may be required
Long-term PPM
Prognosis
Untreated at high risk of sudden cardiac death, once treated prognosis is good
Death, injuries from syncope
Key Facts
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Key Images
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Key References
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