Chronic Fatigue Syndrome Support Group
Chronic Fatigue Syndrome (ME/CFS) describes a sense of exhaustion and post-exertion malaise, even when you have gotten enough rest and sleep. The disease is characterized by six months of incapacitating fatigue experienced as profound exhaustion and extremely poor stamina, and problems with concentration and short-term memory. The cause is unknown, but it is a...
Paroxysmal supraventricular tachycardia (PSVT)
Paroxysmal supraventricular tachycardia (PSVT) occurs when the pathways in the AV node or atrium allow an altered conduction of electricity, and the atrium begins firing in a regular - fast rate, sometimes more than 150 -200 times per minute. The ventricle, sensing the electrical activity coming through the AV node, beats along with each stimulation, and this tachycardia occurs.
This is rarely a life threatening event, but most people feel uncomfortable when PSVT occurs. They may become lightheaded, weak, have shortness of breath, and describe a feeling of fullness in the throat. PSVT is usually tolerated and can even stop on its own. If this is a first time event, activating EMS (emergency medical services) and calling 911 is important, since other tachycardias can be life threatening.
The treatment for PSVT are attempts at stimulating the vagus nerve to slow the heart (see vasovagal syncope above) by holding one's breath and bearing down as if to have a bowel movement. Intravenous medications are often used to break the episode. Many patients have PSVT due to congenital abnormalities in the conduction system. External causes can include hyperthyroidism, electrolyte imbalances, and the use of caffeine, alcohol, overthecounter cold medications containing stimulants, or illegal drugs like cocaine and methamphetamine.
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