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2022年11月28日 · Vocal cord dysfunction (VCD) is when the folds of the vocal cords — also known as the larynx or voice box — do not open properly. Normally, when you breathe in or out, your vocal cords open,...
Overview. Vitamin A is a fat -soluble vitamin. Its different forms are often called "retinoids." They include retinol, retinal, retinoic acid, and retinyl ester. Vitamin A is needed for the...
2022年11月26日 · Nattokinase is a natural enzyme in natto, a Japanese soy-based food. The enzyme is produced during natto’s fermentation process by a specific bacterium called Bacillus subtilis. High natto...
2024年2月12日 · What Is the Alkaline Diet? The alkaline diet encourages you to eat foods that are alkaline (or basic, meaning they have a pH greater than 7), instead of those that are acidic. The theory is...
- 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.
2024年4月4日 · Anorexia nervosa, also called anorexia, is a potentially life-threatening eating disorder that can affect people of all ages, genders, ethnic or racial groups, and body sizes and weights. People...
2023年3月12日 · 4 min read. What’s Plan B One-Step? It’s an emergency contraceptive pill taken by mouth after unprotected sex. It’s used to prevent pregnancy. It’s not for routine contraceptive use, and it doesn’t...
