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

    2022年3月24日 · 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 …

  2. Heart disease - Symptoms and causes - Mayo Clinic

    2024年8月13日 · 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 …

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

    2022年3月24日 · 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 …

  4. How the Heart Works How the Heart Beats - NHLBI, NIH

    2025年6月25日 · 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.

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

    2024年12月27日 · 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 …

  6. Heart Failure - What Is Heart Failure? | NHLBI, NIH

    2022年3月24日 · 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 …

  7. Heart and Vascular Diseases | NHLBI, NIH

    Heart and Vascular Diseases Heart and vascular, or cardiovascular, diseases include conditions such as arrhythmias, coronary heart disease, heart attack, high blood pressure, congenital …

  8. Atrial fibrillation - Symptoms and causes - Mayo Clinic

    2025年10月3日 · Atrial fibrillation (AFib) is a heart rhythm disorder. In a typical heart, a group of cells called the sinus node sends electrical signals that start each heartbeat. The signals go …

  9. Coronary Heart Disease Risk Factors - NHLBI, NIH

    2024年12月27日 · 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 …

  10. How Smoking Affects the Heart and Blood Vessels - NHLBI, NIH

    2022年3月24日 · Smoking is a major risk factor for heart disease. The chemicals you inhale when you smoke cause damage to your heart and blood vessels that makes you more likely to …