Heart Failure Masked as Pulmonary Embolism in Non-adherent Patient With Atrial Fibrillation: Case Report and Analytical Review of the Literature.

Background/aim: Atrial fibrillation (AF) and heart failure (HF) commonly co-occur, significantly increasing morbidity and mortality. Poorly controlled AF can contribute to complications like HF and is associated with conditions, such as stroke and pulmonary embolism (PE). This report involves a man with AF who had persistent respiratory symptoms and left-sided chest pain, initially suspected to be PE, but eventually diagnosed as HF.