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資料更新日期 113-06-03 20:00
2022年11月3日 · What Is Hypovolemic Shock? Hypovolemic shock is a dangerous condition that happens when you suddenly lose a lot of blood or fluids from your body. This drops your blood volume, the amount of...
2020年8月13日 · Use WebMD’s Drug Interaction Checker tool to find and identify potentially harmful and unsafe combinations of prescription medications by entering two or more drugs in question.
2024年2月28日 · Hydronephrosis is when your kidneys swell because your body can't release all of its pee. It may affect one or both kidneys, and it can occur in people of all ages. About 1 in 100 adults get...
- 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12月8日 · WebMD explains the causes, symptoms, and treatment of vertigo, a sensation of spinning that is related to problems with the inner ear.
2023年3月3日 · Confused by blood pressure numbers? Learn more about normal ranges for systolic and diastolic blood pressure readings in this in depth explanation with chart from WebMD.
2023年12月1日 · If your blood sodium levels get too low, you might develop a condition called hyponatremia. Learn why it happens, how to spot the symptoms, and how to get the right treatment.
