Classical presentation of pulmonary embolism is the pleuritic chest pain and the sudden onset of breathing difficulty and decreased oxygen content in the blood or hypoxia. Most of the patients with pulmonary embolism might not present with these classical presentation. So the presentation of the pulmonary embolism Varies from gradually progressive breathlessness to sudden hemodynamic collapse. So to identify the sudden pulmonary embolism, suspicion is the key. So unless you suspect, we may not b