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2021年11月5日 · The normal RBC count is: Men: 4.7 to 6.1 million RBCs per microliter of blood. Women: 4.2 to 5.4 million RBCs per microliter of blood. Children: 4.0 to 5.5 million RBCs per microliter of blood. Any...
2024年1月8日 · Each bit of HDL cholesterol is a microscopic blob that consists of a rim of lipoprotein surrounding a cholesterol center. The HDL cholesterol particle is dense compared to other types of...
- 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.
2023年3月3日 · The diastolic reading, or the bottom number, is the pressure in the arteries when the heart rests between beats. This is the time when the heart fills with blood and gets oxygen. This is what your...
2023年11月14日 · Iron is a mineral you get from food, while ferritin is a blood protein that stores iron. But testing for ferritin is one way your doctor tells whether you're storing a healthy amount of iron in...
2022年11月7日 · 150 - 199. Mildly High. 200 - 499. High. 500 or higher. Very high. When you have high triglyceride levels, there's a good chance you also have low levels of HDL "good" cholesterol and high levels ...
2023年10月12日 · Apolipoprotein B-100 is a protein that helps carry fat and cholesterol through your body. It is also called apolipoprotein B or apoB, for short. Your body needs fat and cholesterol to produce...
