In AV blocks,the site of the block is either the AV node or the bundle branches.
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Q21: Third-degree AV block usually needs no treatment.
Q22: The AV blocks with a constant PR
Q23: 2:1 AV block is characterized by one
Q24: Treatment for third-degree AV block usually includes
A)digitalis.
B)lidocaine.
C)amiodarone.
D)pacemaker.
Q25: All AV blocks involve a disturbance in
Q27: The most dangerous of the AV blocks
Q28: Wenckebach is characterized by
A)gradually prolonging PR intervals.
B)constant
Q29: Wenckebach usually does not need treatment.
Q30: Third-degree AV block is also called Wenckebach.
Q31: In third-degree AV block,only a few of
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