Abstract
We report on eight cases of amiodarone pulmonary toxicity. Main clinical symptoms are acute/subacute dyspnea or progression in some cases. Amiodarone responsibility is difficult to ascertain. Several arguments can be presented: clinical symptoms with dyspnea and/or fever and/or cough, interstitial or in diffusing capacity for carbon monoxide, abnormal broncho-alveolar lavage cytopreparation smear with increased percentage of lymphocytes and polymorphonuclear leucocytes in typical cases; trans-bronchoscopic lung biopsy failed to provided information on amiodarone toxicity in the two patients where biopsy were performed. Differential diagnosis is an essential step to eliminate other possible causes ie pulmonary micro-organism infections, cancer or pulmonary oedema secondary to heart failure. In one case acute pulmonary toxicity occurred early, after introduction of amiodarone, with a proposed immuno-allergic mechanism. In other cases, chronic amiodarone deposition in the lungs can explain clinico-radiologic features. In six cases improvement was observed after discontinuation of therapy within a 6-months period.
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