Massive Pulmonary Embolism Initially Misdiagnosed as Anxiety Attack in a Young Adult: A Case Report

This case report describes a rare and clinically challenging presentation of massive pulmonary embolism in a young adult patient whose initial symptoms were misinterpreted as an anxiety attack. The report highlights the diagnostic difficulties associated with non-specific cardiopulmonary complaints in younger populations, particularly when psychological explanations are prematurely considered. Through detailed clinical findings, laboratory investigations, electrocardiography, echocardiography, and imaging studies, this manuscript emphasizes the importance of maintaining a broad differential diagnosis in acute dyspnea and chest discomfort. The case further discusses the pathophysiology, emergency management, and prognostic implications of delayed pulmonary embolism diagnosis, while underscoring the critical role of early recognition in preventing hemodynamic collapse and mortality.