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Aortic dissection ( AD) occurs when an injury to the innermost layer of the aorta allows blood to flow between the layers of the aortic wall, forcing the layers apart. [3] In most cases, this is associated with a sudden onset of severe chest or back pain, often described as "tearing" in character.
An aortic aneurysm is an enlargement (dilatation) of the aorta to greater than 1.5 times normal size. [1] They usually cause no symptoms except when ruptured. [2] Occasionally, there may be abdominal, back, or leg pain. [3] The prevalence of abdominal aortic aneurysm ("AAA") has been reported to range from 2 to 12% and is found in about 8% of ...
Arch of aorta (supra-aortic vessels): Brachiocephalic trunk Left common carotid artery Left subclavian artery Descending aorta, thoracic part: Left bronchial arteries Esophageal arteries to the thoracic part of the esophagus Third to eleventh posterior intercostal arteries and the subcostal arteries Descending aorta, abdominal part: Parietal ...
Scanning electron micrograph of HIV-1, colored green, budding from a cultured lymphocyte. HIV is the cause of the spectrum of disease known as HIV/AIDS. HIV is a retrovirus that primarily infects components of the human immune system such as CD4 + T cells, macrophages and dendritic cells. It directly and indirectly destroys CD4 + T cells.
