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Table 122-1

Etiologies of Atrioventricular Block

Autonomic
Carotid sinus hypersensitivityVasovagal
Metabolic/Endocrine
HyperkalemiaHypothyroidism
HypermagnesemiaAdrenal insufficiency
Drug-Related
Beta blockersAdenosine
Calcium channel blockersAntiarrhythmics (class I and III)
DigitalisLithium
Infectious
EndocarditisTuberculosis
Lyme diseaseDiphtheria
Chagas' diseaseToxoplasmosis
Syphilis
Heritable/Congenital
Congenital heart diseaseKearns-Sayre syndrome (OMIM #530000)
Maternal SLEMyotonic dystrophy
Inflammatory
SLEMCTD
Rheumatoid arthritisScleroderma
Infiltrative
AmyloidosisHemochromatosis
Sarcoidosis
Neoplastic/Traumatic
LymphomaRadiation
MesotheliomaCatheter ablation
Melanoma
Degenerative

Lev disease

Lenégre disease

Coronary Artery Disease

Acute MI

Abbreviations: MCTD, mixed connective tissue disease; MI, myocardial infarction; OMIM, Online Mendelian Inheritance in Man (database).