link rel="shortcut icon" type="image/x-icon" href="medrx-education.com/files/theme/favicon.ico"
Mediastinum is Central, Midline thoracic cavity which is surrounded anteriorly by Sternum, Posteriorly by 12 Thoracic Vertebrae & Laterally by Pleural Cavity.
Mediastinum is divided into superior mediastinum & Inferior Mediastinum.
Superior Mediastinum is Above the plane of Sternal Angle (Above 2nd Rib).
Superior Mediastinum : Contains – Superior Vena Cava, Aortic Arch & its Branches, Trachea, Oesophagus, Thoracic Duct, Vagus & Phrenic Nerve.
Inferior Mediastinum is Below the plane of Sternal Angle which is further divided into 3 parts : Anterior, Middle & Posterior Mediastinum.
Anterior Mediastinum is Anterior to Heart and contains remnants of Thymus.
Middle Mediastinum Contains the heart and Great Vessels.
Posterior Mediastinum contains : Everything that is below the posterior marigin of heart ie Thoracic Aorta, Esophagus, Thoracic Duct, Azygos Veins, & Vagus Nerve
Adapted From: Cardiology Short Rapid Review - For the USMLE & Non Cardiologists