Key result
Paroxysmal atrioventricular block of all three known mechanisms—vagally mediated, intrinsic, and idiopathic—can rarely occur in the same patient.
This case report highlights a rare scenario where a single patient exhibited vagally mediated, intrinsic, and idiopathic paroxysmal AV block.
Alerts to possible multiple paroxysmal AV block mechanisms in recurrent syncope; leaves open unified management strategies.
Paroxysmal atrioventricular (AV) block is characterized by sudden appearance of complete heart block with no escape rhythm. Three types have been described having different mechanisms namely, vagally mediated, intrinsic, and idiopathic. A rare case scenario is being described with the occurrence of paroxysmal AV block of all three types in the same patient.
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Bansal et al. (2019) studied this question. Paroxysmal atrioventricular block of all three known mechanisms—vagally mediated, intrinsic, and idiopathic—can rarely occur in the same patient.
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