Worsening Hypoxemia in a Patient With Interstitial Pulmonary Fibrosis: Role of Patent Foramen Ovale Mediated Right‐to‐Left Shunt

Key Points

• To examine the role of patent foramen ovale in worsening hypoxemia in a patient with interstitial pulmonary fibrosis.
• Evaluation of hypoxemia in the elderly patient with a history of interstitial pulmonary fibrosis.
• Identification of patent foramen ovale as a right-to-left shunt causative factor.
• Transcatheter closure of the patent foramen ovale was performed.
• Transcatheter closure successfully resolved the patient's hypoxemia.
• The case highlights the importance of assessing intracardiac shunts in patients with hypoxia.