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How the Heart Works - What the Heart Looks Like | NHLBI, NIH
Your heart is in the center of your chest, near your lungs. It has four hollow chambers surrounded by muscle and other heart tissue. The chambers are separated by heart valves, which make sure that the blood keeps flowing in the right direction. Read more about heart valves and how they help blood flow through the heart. Anatomy of the interior of the heart. This image shows the four chambers ...
How the Heart Works - How the Heart Beats | NHLBI, NIH
Your heartbeat is the contraction of your heart to pump blood to your lungs and the rest of your body. Your heart's electrical system determines how fast your heart beats.
How the Heart Works - NHLBI, NIH
The heart is an organ about the size of your fist that pumps blood through your body. It is made up of multiple layers of tissue. Your heart is at the center of your circulatory system. This system is a network of blood vessels, such as arteries, veins, and capillaries, that carries blood to and from all areas of your body. Your blood carries the oxygen and nutrients that your organs need to ...
Heart and Vascular Diseases - NHLBI, NIH
Heart and vascular, or cardiovascular, diseases include conditions such as arrhythmias, coronary heart disease, heart attack, high blood pressure, congenital heart defects, vascular dementia, and stroke. The National Heart, Lung, and Blood Institute (NHLBI) supports research on the causes, diagnosis, treatment, and prevention of heart and vascular diseases, and the interplay of these diseases ...
Heart Smart Basics - What to Know Keeps Yours Healthy
Heart health is the overall well-being of your heart. Heart-healthy living involves understanding your risk factors, making healthy choices, and taking steps to reduce your chances of getting heart disease. Heart disease is a catchall phrase for a variety of conditions that affect the heart’s structure and function.
What Is Coronary Heart Disease? - NHLBI, NIH
Coronary heart disease is a type of heart disease that occurs when the arteries of the heart cannot deliver enough oxygen -rich blood to the heart muscle due to narrowing from the buildup of fatty deposits called plaque . It is also sometimes called coronary artery disease or ischemic heart disease.
مرض القلب - الأعراض والأسباب - Mayo Clinic (مايو كلينك)
Living with مرض القلب? Heart & Blood Health Discussions 35 Replies Tue, Apr 14, 2026 96 Replies Thu, Apr 02, 2026 233 Replies Mon, Mar 30, 2026
Heart rate: What's normal? - Mayo Clinic
A normal resting heart rate for adults ranges from 60 to 100 beats per minute. A heart rate above or below that may signal a health condition.
What Is Heart Failure? - NHLBI, NIH
Heart failure is a condition that occurs when your heart can't pump enough blood for your body's needs. Learn about the symptoms, causes, risk factors, and treatments for heart failure.
What Is a Heart Attack? - NHLBI, NIH
A heart attack is a life-threatening medical emergency that requires immediate treatment. Learn about prevention, symptoms, causes, and treatments for heart attacks.
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