Coronary heart disease (CHD) is a disease in which a waxy substance called plaque (plak) builds up inside the coronary arteries. These arteries supply oxygen-rich blood to your heart muscle. When plaque builds up in the arteries, the condition is called atherosclerosis (ATH-er-o-skler-O-sis).f the flow of oxygen-rich blood to your heart muscle is reduced or blocked, angina (an-JI-nuh or AN-juh-nuh) or a heart attack can occur. Angina is chest pain or discomfort. It may feel like pressure or squeezing in your chest. The pain also can occur in your shoulders, arms, neck, jaw, or back.
It means Alternate. The Alt key on a computer keyboard is used to change (alternate) the function of other pressed keys. It means Alternate. The Alt key on a computer keyboard is used to change (alternate) the function of other pressed keys.
Icon (computing) In computing, an icon is a pictogram or ideogram displayed on a computer screen in order to help the user navigate a computer system or mobile device.