CTICasesRight Hemidiaphragmatic Dysfunction Post Atrial Ablation
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Imaging findings
Chest radiograph and scout view from an abdominal CT demonstrate new elevation of the right hemidiaphragm, accompanied by subsegmental atelectasis in the adjacent lung. Dynamic imaging (sniff test) reveals paradoxical elevation of the right hemidiaphragm during inspiration.
Key takeaways
Right hemidiaphragmatic dysfunction, typically neurapraxia due to thermal injury to the phrenic nerve, is a known but uncommon complication of catheter ablation for atrial fibrillation. It results in paradoxical diaphragmatic motion and can lead to dyspnea and atelectasis. Recovery is variable.
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