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Complete Heart Block

Complete Heart Block

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

Third-degree atrioventricular block - Wikipedia


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

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