A normal coronary artery is responsible for transferring blood to the cardiac muscles. Damage or disease can lead to the deposition of plaque on its inner wall, which solidifies over time and obstructs the passage of blood. Hence, the heart muscle doesn’t get adequate blood. Coronary disease (i.e., blockage in coronary arteries) usually present with symptoms of Angina (chest pain) and breathlessness.
The line of treatment depends upon the percentage and the number of coronary arteries that are blocked. If the blockage is less than 70%, then medical management i.e., by medicine and lifestyle modification is advised. Non-surgical PCI (percutaneous coronary intervention i.e., coronary stent) is done when the blockage is more than 70% and present in one or two coronary arteries.