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While standing standing in the hot one begins to feel hot and light-headed and faints What are the cardiovascular events occurring?
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Is dizziness common in early pregnancy?
It's not uncommon to feel lightheaded or dizzy occasionally. When you're pregnant, your cardiovascular system undergoes dramatic changes: Your heart rate goes up, your heart pumps more blood per minute, and the amount of blood in your body expands by 40 to 45 percent. During a normal pregnancy, your blood pressure gradually decreases in the beginning, reaching its lowest point in the middle of your pregnancy. It then begins to rise, returning to its regular level by the end of pregnancy. Most of the time, your cardiovascular and nervous systems are able to adjust to all these changes, but occasionally they don't, which can leave you feeling lightheaded or a bit dizzy. If you actually faint, it could be a sign that something is wrong, and you should call your practitioner.
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