![]() Always tell your prenatal care provider if you faint.Dietary and Nutritional Recommendations for Patients with Dumping Syndrome (Rapid Gastric Emptying)ĭumping syndrome describes a collection of symptoms that occurs when food is emptied too quickly from the stomach. While once considered harmless, vasovagal syncope during pregnancy-especially the first trimester-has been linked to certain pregnancy complications. The hormones released when you are pregnant can relax the blood vessels, lowering the amount of blood flow to the brain and causing fainting. This process is delayed in people with orthostatic hypotension and can lead to a quick drop in blood pressure that causes fainting. Normally, the blood vessels in your legs get narrower (constrict) when you stand up, which encourages blood to flow to the heart and brain. Some people who faint when they stand up have a condition called orthostatic hypotension, a type of low blood pressure. Simply standing for a long period of time can also lead to vasovagal syncope (orthostatic vasovagal syncope). When this happens, less blood goes back to the heart, which may cause a drop in blood pressure that can make you faint. The gravitational pull that occurs when you stand up is powerful enough to cause blood to pool in your legs. Standing after sitting, lying down, or bending If you faint during or after exercise, it's important to see a healthcare provider. Physical exertionįainting while exercising can sometimes be a sign of a more serious problem like an arrhythmia (irregular heartbeat) or hypertrophic cardiomyopathy (thickening of the heart muscle). ![]() Dehydration can also be caused by diarrhea, taking medications like diuretics, and poorly controlled diabetes. ![]() This causes your blood pressure to drop, potentially triggering vasovagal syncope. When you’re not drinking enough fluid, the volume of blood in your body decreases. Moderate or severe dehydration may lead to fainting. It may be more likely if you exercise in the heat. Your blood vessels widen to release heat, which can temporarily limit blood flow to the brain, causing you to faint. Hot temperatures can lead to vasovagal syncope, often in older people and those who are not used to the heat (for example, if you travel to an area that’s much hotter than where you live). It’s not clear why urinating could make you faint, but emptying a full bladder quickly may cause a sudden drop in blood pressure. Men are more likely to be affected than women. Vasovagal syncope can sometimes occur when you urinate or immediately after you urinate. Older people may be more likely to experience straining during bowel movements because they are at increased risk of constipation. Called defecation syncope, it’s thought to be more common in older people, especially women. Intense straining when you have a bowel movement can make you faint. Intense coughing can increase pressure in the veins in the brain, briefly decreasing blood flow in the brain and leading to fainting. ![]() Sometimes called cough syncope, it is more common in middle-aged or older adults, particularly men who are overweight or very muscular. CoughingĪ severe, forceful cough can sometimes be so intense that it leads to vasovagal syncope. The pain may be due to a medical condition, a very painful period, or a sudden trauma like being hit. Intense pain can overstimulate the vagus nerve and cause you to faint. For example, you may faint if you smell a particularly powerful and foul odor. Even feelings of disgust can be so overpowering that they can make you faint. Other emotional causes include fear of heights, being exposed to a traumatic event, and fear of injury. Some people may faint when having blood drawn at a doctor’s office or if they donate blood. Fear of blood, needles, and other medical tools (like a scalpel) are common triggers. Intense emotionĮmotions that most commonly lead to vasovagal syncope include stress, anxiety, and fear. Below are some of the most common triggers of vasovagal syncope.
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