Pulmonary embolism occurs when an embolus breaks away from a thrombus and blocks the pulmonary artery, generating symptoms that include shortness of breath, chest pain, fainting and haemoptysis.

The DiPEP study: an observational study of the diagnostic accuracy of clinical assessment, D‐dimer and chest x‐ray for suspected pulmonary embolism in pregnancy and postpartum. BJOG 2018. The DiPEP ...