What are the consequences of coronary heart disease?

Pain, failure, death. Blocked coronary arteries affect the blood flow to the heart. This causes chest discomfort when inadequate circulation is present. When blocked arteries close completely, this causes heart attack and heart damage which can lead to heart failure or death.
Early death. Coronary heart disease can result in chest tightness or pain on exertion (called "angina"), exertional shortness of breath ("dyspnea"), heart attack (coronary occlusion), heart failure, cardiac rhythm irregularities ("arrhythmias"), cardiac arrest ("sudden death") and a shortened life expectancy.