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  1. How the Heart Works - What the Heart Looks Like | NHLBI, NIH

    Mar 24, 2022 · Heart inflammation is inflammation in one or more of the layers of tissue in the heart, including the pericardium, myocardium, or endocardium. This can lead to serious complications, …

  2. Heart disease - Symptoms and causes - Mayo Clinic

    Aug 13, 2024 · Symptoms Heart disease symptoms depend on the type of heart disease. Symptoms of heart disease in the blood vessels Coronary artery disease is a common heart condition that affects …

  3. How the Heart Works - How the Heart Beats | NHLBI, NIH

    Jun 25, 2025 · 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.

  4. Heart attack - Symptoms & causes - Mayo Clinic

    A heart attack occurs when an artery that sends blood and oxygen to the heart is blocked. Fatty, cholesterol-containing deposits build up over time, forming plaques in the heart's arteries. If a plaque …

  5. How the Heart Works - NHLBI, NIH

    Mar 24, 2022 · 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 …

  6. Strategies to prevent heart disease

    Jan 20, 2026 · Heart disease is a leading cause of death. You can't change some risk factors for it, such as family history, sex assigned at birth or age. But you can take plenty of other steps to lower your …

  7. What Is Coronary Heart Disease? - NHLBI, NIH

    Dec 27, 2024 · 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 …

  8. Heart rate: What's normal? - Mayo Clinic

    Oct 22, 2025 · 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.

  9. Heart arrhythmia - Symptoms and causes - Mayo Clinic

    Oct 13, 2023 · Coronary artery disease, other heart problems and previous heart surgery. Narrowed heart arteries, a heart attack, heart valve disease, prior heart surgery, heart failure, cardiomyopathy …

  10. Heart failure - Symptoms and causes - Mayo Clinic

    Jan 21, 2025 · Heart failure occurs when the heart muscle doesn't pump blood as well as it should. Blood often backs up and causes fluid to build up in the lungs and in the legs. The fluid buildup can …