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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 - 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
Heart disease - Symptoms and causes - Mayo Clinic 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 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
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
Cardiomyopathy - Symptoms and causes - Mayo Clinic Overview Cardiomyopathy (kahr-dee-o-my-OP-uh-thee) is a disease of the heart muscle It causes the heart to have a harder time pumping blood to the rest of the body, which can lead to symptoms of heart failure Cardiomyopathy also can lead to some other serious heart conditions There are various types of cardiomyopathy The main types include dilated, hypertrophic and restrictive
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
Take Action Toward Better Heart Health: | NHLBI, NIH Take Action Toward Better Heart Health: Eat a Heart-Healthy Diet A healthy diet that is low in sodium and saturated fat is key to heart disease prevention Try the highly rated Dietary Approaches to Stop Hypertension (DASH) eating plan It recommends: Eating vegetables, fruits, and whole grains
Atrial tachycardia - Symptoms and causes - Mayo Clinic Atrial tachycardia risk factors include: Heart conditions such as coronary artery disease, heart valve disease and other heart diseases Heart failure Heart condition present at birth, called a congenital heart defect Previous heart surgery Sleep apnea Thyroid disease Lung disease, including chronic obstructive pulmonary disease (COPD