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The cause of sarcoidosis is unknown. [2] Some believe it may be due to an immune reaction to a trigger such as an infection or chemicals in those who are genetically predisposed. [12] [13] Those with affected family members are at greater risk. [4] Diagnosis is partly based on signs and symptoms, which may be supported by biopsy. [6]
The most common cause of cardiac syncope is cardiac arrhythmia (abnormal heart rhythm) wherein the heart beats too slowly, too rapidly, or too irregularly to pump enough blood to the brain. [9] Some arrhythmias can be life-threatening. [9] Two major groups of arrhythmias are bradycardia and tachycardia. Bradycardia can be caused by heart blocks.
Reflex syncope can occur in otherwise healthy individuals, and has many possible causes, often trivial ones such as prolonged standing with the legs locked. [ citation needed ] The main danger of vasovagal syncope (or dizzy spells from vertigo) is the risk of injury by falling while unconscious.
Sarcoidosis is a disease of unknown cause that leads to the development of granulomas in various organs. While the lungs are typically involved, other organs may equally be affected. Some subforms of sarcoidosis, such as Löfgren syndrome, may have a particular precipitant and have a specific course. It is unknown which characteristics ...
Löfgren syndrome is a type of acute sarcoidosis, [1] an inflammatory disorder characterized by swollen lymph nodes in the chest, tender red nodules on the shins, fever and arthritis. [2] It is more common in women than men, and is more frequent in those of Scandinavian , Irish , African and Puerto Rican heritage.
The exact cause of Heerfordt syndrome has not yet been definitively determined. Of those patients who have been diagnosed with Heerfordt syndrome, 15% have a close relative who also has the syndrome. One possible explanation is that the syndrome results from a combination of an environmental agent and a hereditary predisposition.
"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Sugar-sweetened beverages may increase your risk for heart disease and type 2 diabetes, new research ...
Apart from treating underlying reversible causes (e.g., stopping or reducing certain medications, treating autoimmune causes), several measures can improve the symptoms of orthostatic hypotension and prevent episodes of syncope (fainting). Even small increases in the blood pressure may be sufficient to maintain blood flow to the brain on standing.