Atropine: When AV block is due to vagal overactivity, e.g. digitalis toxicity, some cases of MI; it can be improved by atropine 0.6–1.2 mg i.m. Atropine abbreviates AV node ERP and increases conduction velocity in bundle of His.
DRUGS FOR AV BLOCK
Atropine: When AV block is due to vagal overactivity, e.g. digitalis toxicity, some cases
of MI; it can be improved by atropine 0.6–1.2 mg i.m. Atropine abbreviates AV
node ERP and increases conduction velocity in bundle of His.
Sympathomimetics (Adr, isoprenaline):
These drugs may overcome
partial heart block by facilitating AV conduction and shortening ERP of
conducting tissues.
They may also be used
in complete (3rd degree) heart block to maintain a sufficient idioventricular rate
(by increasing automaticity of ventricular pacemakers) till external pacemaker
can be implanted.
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