A Case Report of Exercise-Induced Pulmonary Oedema After an Ironman

Exercise-induced pulmonary oedema (EIPO) is a rare and poorly understood condition, most commonly reported in patients participating in swimming-based endurance events. We report a 47-year-old male who developed acute dyspnoea and a cough during the cycling segment of an Ironman triathlon post swimming stage. The patient completed the race with his symptoms, and post-race assessment revealed hypoxia, prompting transfer to the local emergency department. Chest imaging showed acute pulmonary oedema. The patient was treated with furosemide and made a full recovery. EIPO is relatively uncommon in sporting events and typically presents with dyspnoea and hypoxia. It is most frequently observed in cold-water, submersive sports, although cases during land-based endurance activities have been reported. The underlying pathophysiology remains poorly understood. With the growing popularity of endurance sports, it is essential for clinicians to recognise EIPO promptly to ensure timely management.