Key result
Left lateral accessory pathway ablation can cause inadvertent mitral isthmus block, mimicking a second pathway.
Why the study?
Complete mitral isthmus conduction block can occur inadvertently during RF catheter ablation for a left lateral concealed accessory pathway mimicking concentric retrograde activation, which may lead to misdiagnosis and inappropriate RF applications.
Population
Patients with left lateral concealed accessory pathway mimicking concentric retrograde activation
Design
Case report
Authors
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Recognition of inadvertent mitral isthmus block in concealed AP ablation may avert misdiagnosis; Level 5 case leaves broader implications open.
Awareness of inadvertent mitral isthmus block during left lateral accessory pathway ablation is crucial to avoid misdiagnosing a second pathway and delivering inappropriate radiofrequency applications.
Bulava et al. (2009) studied this question. Radiofrequency catheter ablation of a left lateral concealed accessory pathway can inadvertently cause complete mitral isthmus conduction block, risking misdiagnosis of a concomitant pathway.
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