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  1. Calculate Your BMI | NHLBI, NIH

    Calculate Your BMI What you can do to improve your health Maintain a healthy weight Eat a heart-healthy diet Prepare healthy recipes Increase physical activity Understanding your health data What …

  2. Atrial fibrillation - Symptoms and causes - Mayo Clinic

    Jan 14, 2026 · 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 across the upper …

  3. 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, …

  4. Tachycardia - Symptoms and causes - Mayo Clinic

    Dec 15, 2023 · Learn more about the symptoms and treatment of this heart rhythm disorder, which causes a rapid heart rate.

  5. Sepsis - Symptoms & causes - Mayo Clinic

    Feb 10, 2023 · Sepsis is a serious condition in which the body responds improperly to an infection. The infection-fighting processes turn on the body, causing the organs to work poorly. Sepsis may …

  6. 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 …

  7. 10 ways to control high blood pressure without medication

    Mar 31, 2026 · High blood sugar and high levels of "bad" non-HDL cholesterol raise the risk of heart disease. To help manage cholesterol and blood sugar, try some of the same healthy habits that help …

  8. 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.

  9. Gastroesophageal reflux disease (GERD) - Symptoms and causes

    Apr 23, 2025 · Gastroesophageal reflux disease happens when stomach acid flows back up into the esophagus and causes heartburn. It's often called GERD for short. This backwash is known as acid …

  10. Coronary Heart Disease - Risk Factors | NHLBI, NIH

    Dec 27, 2024 · Coronary heart disease is the leading cause of death for both men and women in the United States. Men’s risk for coronary heart disease starts to increase significantly around age 45. …