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 … It has four hollow chambers surrounded by muscle and other heart tissue. · cardiomyopathy (kahr-dee-o-my-op-uh-thee) is a disease of the heart muscle. The chambers are separated by heart … Worried about qt interval prolongation? Your heart is at the center of your circulatory … It is made up of multiple layers of tissue. Your hearts electrical system determines how fast your heart beats. The blood enters the hearts right atrium and is pumped to … · 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 … · oxygen-poor blood from the body enters your heart through two large veins called the superior and inferior vena cava. · coronary artery disease, other heart problems and previous heart surgery. Narrowed heart arteries, a heart attack, heart valve disease, prior heart surgery, heart failure, … · the heart is an organ about the size of your fist that pumps blood through your body. · your risk of coronary heart disease increases based on the number of risk factors you have and how serious they are. It causes the heart to have a harder time pumping blood to the rest of the body, which can lead … · 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. · your heartbeat is the contraction of your heart to pump blood to your lungs and the rest of your body. Some risk factors — such as high blood pressure and …