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2024年2月24日 · What do my results mean? Here are a few things to look for: Positive vs. Negative. Some lab tests answer yes-or-no questions like whether you’re pregnant or have certain kinds of infections. These...
- 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...
2024年3月3日 · What Is a Heart Rate? Your heart rate is the number of times your heart beats in 1 minute. Heart rates vary from person to person. It’s lower when you’re at rest and higher when you exercise....
2024年4月3日 · Hypertension is another name for high blood pressure. Doctors classify high blood pressure two ways: primary and secondary. Primary high blood pressure, also called essential high blood...
2017年5月15日 · What Is Isolated Systolic Hypertension? Medically Reviewed by James Beckerman, MD, FACC on May 15, 2023. Written by Matt Smith. What Problems Can It Cause? Who Gets Isolated Systolic...
2023年5月22日 · What Is a Partial Thromboplastin Time Test? Medically Reviewed by Carol DerSarkissian, MD on May 22, 2023. Written by WebMD Editorial Contributors. What Does a PTT Test Look For? Why Would I Need...
