Key result
A 65-year-old female with intermittent atypical chest pain and syncope was diagnosed with paroxysmal complete atrioventricular block using a home cardiac monitor and treated with a dual-chamber pacemaker.
Why the study?
Paroxysmal complete atrioventricular block lacks specific signs or symptoms and is often missed due to its unpredictability and normal 1:1 conduction on routine electrocardiograms.
Case Report (n=1)
No
Paroxysmal complete atrioventricular block is a potentially fatal condition that is often missed due to normal baseline ECGs, requiring high clinical suspicion in symptomatic patients.
Case of symptomatic PCAB illustrates diagnostic challenges in syncope; leaves open subtype-specific management strategies.
Paroxysmal complete atrioventricular block (PCAB) is clinically characterized by a sudden change from 1:1 atrioventricular (AV) conduction leading to complete heart block. Patients may have a vast array of symptoms, but commonly, PCAB will lead to syncope and possible sudden cardiac death. The literature currently consists of three different types of PCAB: intrinsic paroxysmal atrioventricular block, extensive vagal paroxysmal atrioventricular block, and extrinsic idiopathic paroxysmal atrioventricular block. Currently, there is no single symptom or sign that is specific to a single type of AV block. PCAB is often missed or overlooked because of its unpredictability and no evidence of conduction disease with a normal 1:1 conduction on routine electrocardiograms. Here, we present a case of a 65-year-old female who has been intermittently symptomatic for four years and was found to have PCAB.
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Casey et al. (2023) conducted a case report in Paroxysmal complete atrioventricular block (n=1). Dual-chamber pacemaker implantation was evaluated. A 65-year-old female with intermittent atypical chest pain and syncope was diagnosed with paroxysmal complete atrioventricular block using a home cardiac monitor and treated with a dual-chamber pacemaker.
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