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2023年9月5日 · What Are Drug Interactions? When a medication works right, it boosts your health or helps you feel better. But a drug can bring on problems if it doesn't mix well with something else you put into...
2023年11月7日 · 9 min read. What Is Atherosclerosis? Atherosclerosis is when plaque -- a sticky substance made of cholesterol, fat, calcium, and other materials — builds up inside the walls of your arteries....
2024年1月7日 · What Is an Incubation Period? The incubation period is the number of days it takes for symptoms to appear after you’re infected with something. Health care professionals and government officials...
2023年8月8日 · What Is Dyspnea? When you have shortness of breath, you can't catch your breath or get enough air in your lungs. Your doctor might call it dyspnea. It can be a warning sign of a health problem that...
- 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8月12日 · Wheezing. This high-pitched whistling noise can happen when you’re breathing in or out. It’s usually a sign that something is making your airways narrow or keeping air from flowing through them....
2024年6月20日 · Effects of High Good Cholesterol Levels. Very high HDL cholesterol levels don't give you more protection. Even moderately high levels may not protect you if you have certain health issues or...
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