View source for Template:Heart block DDX

Differential includes ischemic events, electrolyte abnormalities, and medication overdoses in addition to rheumatologic conditions<ref>Hampton, JR. The ECG in Practice (5th edition), Churchill Livingstone 2008.</ref><ref>Wagner, GS. Marriott’s Practical Electrocardiography (11th edition), Lippincott Williams & Wilkins 2007.</ref>
*Anterior [[MI]]
*[[Rheumatic fever]]
*[[Myocarditis]]
*[[Lyme disease]]
*Lenegre's disease
*Lev's disease
*[[SLE]]
*[[Scleroderma|Systemic sclerosis]]
*[[Amyloidosis]]
*[[Hemochromatosis]]
*[[Sarcoidosis]]
*[[Hyperkalemia]]
*[[Toxicology]]
**[[Beta blocker toxicity]]
**[[Calcium channel blocker toxicity]]
**[[Digoxin toxicity]]
**[[Amiodarone]]

[[File:Second degree heart block.png|thumb|Types of second degree AV block]]
{{AV block types}}

==Bundle and Fascicular Blocks==
*[[Right Bundle Branch Block]]
*[[Left Bundle Branch Block]]
*[[Left Anterior Fascicular Block]]
*[[Left Posterior Fascicular Block]]
*[[Trifascicular Block]]

==Premature Beats==
*[[Premature atrial contraction]]
*[[Premature junctional complex]]
*[[Premature ventricular contraction]]