Changes

SA node -> AV node -> bundle of His -> left/right bundles -> Purkinje fibers

SA node -> AV node -> bundle of His -> left/right bundles -> Purkinje fibers

==[[Bradyarrhythmias]] and Conduction Abnormalities==

==[[Bradyarrhythmias]] and Conduction Abnormalities==

*H&P: syncope, nausea, vomiting, blurred vision, dizziness. '''Inferior MI''' can be complicated by symptomatic bradycardia and cardiogenic shock due to ischemia of the SA node leading to an increase in vagal tone.

*H&P: syncope, nausea, vomiting, blurred vision, dizziness. '''Inferior MI''' can be complicated by symptomatic bradycardia and cardiogenic shock due to ischemia of the SA node leading to an increase in vagal tone. Beta blocker toxicity.

*Dx: [[sinus brady]], [[SSS]], [[1st degree AV block]], [[2nd degree AV block (Mobitz 1)]], [[2nd degree AV block (Mobitz 2)]], [[3rd degree AV block]]

*Dx: [[sinus brady]], [[SSS]], [[1st degree AV block]], [[2nd degree AV block (Mobitz 1)]], [[2nd degree AV block (Mobitz 2)]], [[3rd degree AV block]]

*Tx: correct electrolytes/hypothermia, '''atropine/dopamine''', transcutaneous pacing, transvenous pacing, leadless pacing, permanent pacemaker

*Tx: Correct electrolytes/hypothermia, Glucagon for beta blocker toxicity, '''atropine/dopamine''', transcutaneous pacing, transvenous pacing, leadless pacing, permanent pacemaker

 

==[[Tachyarrhythmias]]==

==[[Tachyarrhythmias]]==

*H&P: palpitations, syncope

*H&P: palpitations, syncope