Title: Postural orthostatic tachycardia syndrome Content: Postural orthostatic tachycardia syndrome (POTS, also called postural tachycardia syndrome) is a medical problem. When a person has POTS, their heart beats faster than normal when they stand up. POTS may also cause many other symptoms. ==Meaning== * Postural means that POTS symptoms depend on a person's posture (their position - for example, whether they are lying down or standing up) * Orthostatic means that a person is standing up * Tachycardia means that a person's heart is beating faster than normal * A syndrome is a group of symptoms Put together, the words "postural orthostatic tachycardia syndrome" mean that when a person stands up, they get tachycardia, and they also have other symptoms. ==Signs and symptoms== When a healthy person stands up, their heart beats faster for a little while. It does this to push blood to the brain. Then the person's heart rate goes back to normal. When a person with POTS stands up, their heart beats much faster than normal. POTS is diagnosed when a person's heart rate increases by at least 30 beats per minute within 10 minutes after they stand up. This is called postural tachycardia. People with POTS also have other symptoms of orthostatic intolerance (symptoms that get worse when a person is standing up, and get better when the person is lying down). These symptoms may include: * Palpitations (feeling the heart pounding) * Feeling dizzy, fainting, or almost fainting * Chest pain * Trouble breathing, especially when exercising * Feeling very weak or tired * Blurred vision (not being able to see clearly) * Headache * Trouble concentrating or thinking * Nausea * Trouble sleeping * Pallor (pale skin) or sweating Symptoms may get worse if a person with POTS: * Sits for a long time * Stands for a long time * Drinks alcohol or caffeine * Gets too hot * Exercises too much * Eats a large meal ==Causes== POTS can be caused by many different things. Many of these causes are not well understood. Some of the known causes of POTS include: * Genetics * Recently being sick with a virus * Chronic diabetes * Hypovolemia (not having enough blood in the body). This causes less blood to get to the heart. The body tries to fix this by making the heart beat faster, so more blood will get pushed into the heart. * Problems with the nerves in the lower legs. This causes blood to pool in the lower legs. The body tries to fix this by making the heart beat faster so it can push more blood to the rest of the body. POTS is more common in: * Women between the ages of 15 and 50 * People who have recently been pregnant, had surgery, had a recent trauma, or had to rest in bed for a long time * People who have had autoimmune diseases, irritable bowel syndrome, anemia, hyperthyroidism, fibromyalgia, amyloidosis, sarcoidosis, and cancer == Treatment == thumb|260px|A woman riding a recumbent bicycle. Because it allows people to lie back while exercising, recumbent bicycling is often suggested for people with POTS There are many different treatments for the symptoms of POTS. Some of these treatments include: * Drinking a lot of water (this increases the amount of fluid in the body, which helps blood get to the heart more easily) * Eating a high-salt diet (this helps keep fluid in the body and helps people with POTS from getting dehydrated) * Getting exercise, especially exercise like recumbent bicycling (bicycling while lying back, which prevents symptoms caused by being upright) * Using compression stockings (very tight socks) to keep blood from pooling in the legs * Avoiding things that can make POTS worse, like getting dehydrated, exercising too much, eating large meals, drinking alcohol, or getting too hot No medications have been approved by the United States Food and Drug Administration to treat POTS. However, sometimes doctors treat POTS with medications that: * Prevent the body from losing salt; * Raise blood pressure; and/or * Keep the heart from pumping too fast. == Recovery == Most people with POTS are able to get better with treatment. About 6 out of every 10 people with POTS is able to recover within 5 years of being diagnosed with POTS. About 9 out of every 10 people with POTS have some improvement with a combination of physical treatments and medicines. However, some people with POTS do not get better, and may even get worse over time. ==Related pages== * Heart ** Heart rate ** Tachycardia * Blood pressure