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2023年11月18日 · What Are White Blood Cells? White blood cells (WBCs), also called leukocytes, fight infection. They move throughout your body in your blood, looking for invaders. Your body is continuously making a...
2024年2月25日 · What Is Potassium? Why Would I Get This Test? How Do I Prepare? What Do My Results Mean? 3 min read. In the right amounts, the mineral potassium helps your nerves and muscles “talk” to each...
2023年11月3日 · 6 min read. You have hypokalemia when you have low levels of potassium in your blood. Potassium is a mineral your body needs to work normally. It helps muscles to move, cells to get the nutrients...
- Pathophysiology
- Significance
- Signs and symptoms
- Overview
- Prognosis
A blood pressure reading appears as two numbers. The first and higher of the two is a measure of systolic pressure, or the pressure in the arteries when the heart beats and fills them with blood. The second number measures diastolic pressure, or the pressure in the arteries when the heart rests between beats.
Optimal blood pressure is less than 120/80 (systolic/diastolic). In healthy people, low blood pressure without any symptoms is not usually a concern and does not need to be treated. But low blood pressure can be a sign of an underlying problem -- especially in the elderly -- where it may cause inadequate blood flow to the heart, brain, and other vi...
Chronic low blood pressure with no symptoms is almost never serious. But health problems can occur when blood pressure drops suddenly and the brain is deprived of an adequate blood supply. This can lead to dizziness or lightheadedness. Sudden drops in blood pressure most commonly occur in someone who's rising from a lying down or sitting position t...
Postural hypotension is considered a failure of the cardiovascular system or nervous system to react appropriately to sudden changes. Normally, when you stand up, some blood pools in your lower extremities. Uncorrected, this would cause your blood pressure to fall. But your body normally compensates by sending messages to your heart to beat faster ...
The risk of both low and high blood pressure normally increases with age due in part to normal changes during aging. In addition, blood flow to the heart muscle and the brain declines with age, often as a result of plaque buildup in blood vessels. An estimated 10% to 20% of people over age 65 have postural hypotension.
2022年3月6日 · Use WebMD’s Pill Identifier to find and identify any over-the-counter or prescription drug, pill, or medication by color, shape, or imprint and easily compare pictures of multiple drugs.
2024年3月14日 · What Is a Lactic Acid Blood Test? It’s a test that measures the amount of lactic acid (also called “lactate”) in your blood. This acid is made in muscle cells and red blood cells. It forms when...
2023年11月6日 · Monocytes are a type of white blood cell. White blood cells are an important part of your immune system. Like the other types of white blood cells, monocytes are produced in your bone marrow and...
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