Second degree AV block other diagnostic studies

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Syed Musadiq Ali M.B.B.S.[2]

Overview

Additional testing for management of bradycardia associated atrioventricular block

Ambulatory electrocardiographic monitoring (Class IIa , Level of Evidence B):

❑ Ambulatory electrocardiographic monitoring is recommended in patients with first degree AV block, or mobitz type 1 second degree AV block to establish the correlation between symptoms related to bradycardia (lightheadness, syncope) and atrioventricular block

Exercise treadmill test (Class IIa , Level of Evidence C):

❑ Exercise treadmill test is reasonable in patients with first degree AV block or mobitz type 1 second degree AV block in resting ECG who have chest pain or shrtness of breath during exercise to identify the benefit of permanent pacing

Electrophysiologic study (Class IIb , Level of Evidence B):

❑EPS may be considered in selective patients with second degree AV block to determine the level of block

Pharmacologic challenge tests (Class IIb , Level of Evidence C):

❑Atropine, procainamide, isoproternole, carotide sinus massage may be used in selected patients with second degree AV block to determine the level of block and benefit from permanent pacing

Other diagnostic studies

There are no other diagnostic studies associated with second degree AV block.