Local inhomogeneous conduction and non-uniform anisotropism in a normal voltage atrial map.
Pietro RossiFilippo Maria CautiMarco PolselliSara CorradettiStefano BianchiPublished in: Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing (2022)
A patient with symptomatic persistent atrial fibrillation and recurrences after pulmonary vein isolation (PVI) underwent a second ablation procedure. The PVs were found isolated and the left atrial substrate tissue was mapped. During sinus rhythm, the voltage map resulted in a normal range (>0,5mV) while a map of EGMs durations revealed an area presenting prolonged EGMs (>45 ms) in the anterior region. The activation map of this area demonstrated abnormal conduction and a non-uniform anisotropism when compared with areas in which EGM's normal durations were recorded. The EGMs duration map may offer additional clinical information on the areas presenting abnormal conduction predisposing arrhythmias maintenance in patients suffering from persistent atrial fibrillation.
Keyphrases
- atrial fibrillation
- left atrial
- catheter ablation
- oral anticoagulants
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- mitral valve
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- direct oral anticoagulants
- left ventricular
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- end stage renal disease
- mass spectrometry
- percutaneous coronary intervention
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