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Postural orthostatic tachycardia syndrome (POTS) is a condition characterized by an abnormally large increase in heart rate upon sitting up or standing. [1] POTS is a disorder of the autonomic nervous system that can lead to a variety of symptoms, [10] including lightheadedness, brain fog, blurred vision, weakness, fatigue, headaches, heart palpitations, exercise intolerance, nausea ...
[29] [30] [31] The distinction is that tachycardia be reserved for the rapid heart rate itself, regardless of cause, physiologic or pathologic (that is, from healthy response to exercise or from cardiac arrhythmia), and that tachyarrhythmia be reserved for the pathologic form (that is, an arrhythmia of the rapid rate type).
In a healthy heart during normal sinus rhythm, only either the fast pathway or the slow pathway is used at any given moment for conducting electrical signals through the AV node, not both simultaneously. [10] During PSVT episodes, an irregular heartbeat is triggered by an early electrical signal from one of the atria.
“Many conditions can trigger POTS, including viral infections such as SARS-CoV-2, the virus that causes COVID-19,” Dr. Bala Munipalli, a physician who heads the Post-Acute Sequelae of COVID ...
Long QT syndrome (LQTS) is a condition affecting repolarization (relaxing) of the heart after a heartbeat, giving rise to an abnormally lengthy QT interval. [7] It results in an increased risk of an irregular heartbeat which can result in fainting, drowning, seizures, or sudden death. [1]
Junctional ectopic tachycardia (JET) is a rare syndrome of the heart that manifests in patients recovering from heart surgery. [1] It is characterized by cardiac arrhythmia, or irregular beating of the heart, caused by abnormal conduction from or through the atrioventricular node (AV node).
Most of these can be cured if the tumor can be completely removed. When a tumor is very large or there are multiple tumors, removing part of it that is not inside the heart walls can improve or eliminate symptoms. Some types can be followed with yearly echocardiograms instead of surgery if they are no longer causing symptoms.
A 2022 study published in the American Heart Association’s journal Stroke found that women with a history of endometriosis may be nearly 35% more likely to have a stroke later in life than their ...
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