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. · oxygen-poor blood from the body enters your heart through two large veins called the superior and inferior vena cava. · your heart is in the center of your chest, near your lungs. · 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. A buildup of fats, cholesterol and other substances in and on the artery walls usually causes coronary artery disease. Your blood carries the oxygen and nutrients that your organs … This image shows the … · your risk of coronary heart disease increases based on the number of risk factors you have and how serious they are. · 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 and other heart damage are risk factors for almost any kind of arrhythmia. The chambers are separated by heart valves, which make sure that the blood keeps flowing in the right direction. The blood enters the hearts right atrium and is pumped to your right ventricle, which in turn pumps the blood to your lungs. Your hearts electrical system determines how fast your heart beats. · the heart is an organ about the size of your fist that pumps blood through your body. It has four hollow chambers surrounded by muscle and other heart tissue. 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. Worried about qt interval prolongation? This online evidence based resource will help guide you how to measure the qt interval and calculate the qtc value with an easy to use calculator which takes into account the patients underlying rhythm, gender and age. It is also sometimes called coronary artery disease or … Your heart is at the center of your circulatory system. · 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. Other risk factors, such as your age, family history, and race and ethnicity, cannot be changed. · cardiomyopathy (kahr-dee-o-my-op-uh-thee) is a disease of the heart muscle. It is made up of multiple layers of tissue. This buildup is called plaque. Some risk factors — such as high blood pressure and unhealthy cholesterol levels can be adjusted through heart-healthy lifestyle changes. Anatomy of the interior of the heart. · your heartbeat is the contraction of your heart to pump blood to your lungs and the rest of your body.