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2024年2月2日 · Most heart attacks are the end result of coronary heart disease, a condition that clogs coronary arteries with fatty, calcified plaques. 2 of 5 / Symptoms & Types. View All. Heart Disease...
2023年5月28日 · What Is a Prothrombin Time Test? Medically Reviewed by Carol DerSarkissian, MD on May 28, 2023. Written by WebMD Editorial Contributors. What Does a PT Test Look For? When Would I Need a PT Test?...
2023年5月22日 · That’s when your doctor might order a partial thromboplastin time (PTT) test, which measures how many seconds it takes for your blood to clot. What Does a PTT Test Look For? Your body makes...
2023年11月7日 · Arteriosclerosis is a stiffening and thickening of blood vessels that can restrict blood flow to the heart and other organs. It's sometimes called hardening of the arteries. Atherosclerosis is a...
- 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11月23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9月21日 · Vitamin B12 is an essential nutrient that helps the body create DNA, nourishes the brain and nervous system, and assists with the formation of healthy red blood cells. The nutrient occurs...
