- 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
- Heart disease - Symptoms and causes - Mayo Clinic
Symptoms of heart disease in the blood vessels Coronary artery disease is a common heart condition that affects the major blood vessels that supply the heart muscle A buildup of fats, cholesterol and other substances in and on the artery walls usually causes coronary artery disease This buildup is called plaque
- 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 Blood Flows through the Heart - NHLBI, NIH
Oxygen-poor blood from the body enters your heart through two large veins called the superior and inferior vena cava The blood enters the heart's right atrium and is pumped to your right ventricle, which in turn pumps the blood to your lungs
- 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 Failure - 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
- Coronary Heart Disease - Risk Factors | NHLBI, NIH
Your risk of coronary heart disease increases based on the number of risk factors you have and how serious they are Some risk factors — such as high blood pressure and unhealthy cholesterol levels can be adjusted through heart-healthy lifestyle changes Other risk factors, such as your age, family history, and race and ethnicity, cannot be changed Almost half of adults in the United States
- Strategies to prevent heart disease - Mayo Clinic
Heart disease is a leading cause of death You can't change some risk factors for it, such as family history, sex at birth or age But you can take plenty of other steps to lower your risk of heart disease
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