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Coronary Heart Disease (CHD) is the most common heart disease. The so-called “coronary artery” to the arteries located on the surface of the heart responsible for supplying blood and nutrients to the heart. The blood and nutrients will not be able to pass through in case of narrow blood vessels or obstruction, which will lead to myocardial ischemia and therefore trigger angina pectoris; sometimes it could cause arrhythmia, acute myocardial infarction, heart failure, and even sudden cardiac death. This is known as the coronary artery disease.

The size of the heart of healthy adults is a muscular pump weighing about 200 ~ 300 grams, which delivers blood to the whole body through the circulation system every day. The heart may be filled with blood but the cardiac cells could not acquire oxygen and nutrient from the blood directly but must rely on the two coronary arteries to transmit blood to the cardiac muscle cells.

Coronary Arteries

Coronary arteries are divided into the left and right coronary arteries from the root of aorta. In general, the left coronary artery supplies 65 % of blood flow to the heart while the right coronary artery supplies the remaining 35 %.  The narrowing or obstruction with coronary artery will affect the supply of oxygen and nutrients to the heart. To maintain the normal operation of the heart, it is necessary to maintain the unobstructed vessel of coronary artery.

Coronary arteries are the arteries supplying oxygen and nutrients to the heard and can be divided into the left coronary artery and right coronary artery (RCA). The left coronary artery is split into left anterior descending (LAD) and left circumflex (LCA). The three coronary arteries and blood vascular branches surrounding the heart to provide oxygen and nutrients needed to the heart.

• Left Coronary Artery

Responsible for supplying blood to left myocardium. It is further split into left anterior descending and left circumflex, where the left anterior descending is responsible for left ventricle anterior muscle and the left circumflex responsible for the muscles in left ventricle lateral and posterior.

• Right Coronary Artery

Providing blood to the right myocardium and is responsible for the muscles in right ventricle and left ventricle inferior.