- Coronary heart disease: coronary heart disease (CHD) refers to blockage of the arteries supplying blood to the heart muscle and is a major cause of death in Western culture,  with social and psychological factors  involved. 
Other /More definition:
Coronary heart disease (CHD)  refers to chronic illness that is a leading cause of death in the United States that occurs  when the blood vessels that supply the heart with oxygen and nutrients are narrowed or closed by plaque, resulting in a myocardial infarction/heart attack when closed completely    
        
        
                                        