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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.
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 ...
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 ...
Myocardial infarction Other names Acute myocardial infarction (AMI), heart attack A myocardial infarction occurs when an atherosclerotic plaque slowly builds up in the inner lining of a coronary artery and then suddenly ruptures, causing catastrophic thrombus formation, totally occluding the artery and preventing blood flow downstream to the heart muscle.
Bell's palsy is a type of facial paralysis that results in a temporary inability to control the facial muscles on the affected side of the face.[1] In most cases, the weakness is temporary and significantly improves over weeks.[4] Symptoms can vary from mild to severe.[1] They may include muscle twitching, weakness, or total loss of the ...
Wikipedia[note 3] is a free content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the use of the wiki-based editing system MediaWiki. Wikipedia is the largest and most-read reference work in history.[3][4] It is consistently ranked as one of the ten most popular ...
The Chernobyl disaster [a] began on 26 April 1986 with the explosion of the No. 4 reactor of the Chernobyl Nuclear Power Plant near the city of Pripyat in the north of the Ukrainian SSR, close to the border with the Byelorussian SSR, in the Soviet Union. [1] It is one of only two nuclear energy accidents rated at seven—the maximum severity ...
