Most common cause of heart block in
infants is
a) SLE
b) Surgery for congentital heart disease
c) Viral myocarditis
d) Rheumatic fever
Correct Answer - B
Ans. is ‘b’ i.e., Surgery for congentital heart disease
In children, the most common cause of permanent acquired
complete AV block is surgery for congenital heart disease.
Postsurgical completer atrioventricular block (A VB) is the most
common cause for acquired AV block in children, resulting from
trauma to the AV node at time of surgery (i.e., hemorrhage,
ischemia, necrosis, inflammation, traumatic disruption).
The second most common cause is congenital herat disease
associated with complete AV block.
Other etiologies of acquired AV block are often reversible and
include :
Digitalis and other drug intoxications.
Viral myocarditis.
Acute rheumatic fever, Lyme disease, and infectious mononucleosis.