According to the actor’s death certificate, Reddick’s cause of death has been determined as ischemic heart disease and atherosclerotic coronary artery disease, as reported via TMZ.
Ischemic heart disease occurs when the heart is deprived of needed oxygen and blood due to narrowed arteries (via Healthgrades). Most often, this is due to an accumulation of cholesterol particles forming along the artery walls. While some people with the condition present as asymptomatic, others may experience chest pain, pressure, tightness, or shortness of breath, particularly during physical activity or in the midst of heightened emotional states. Such symptoms may come on suddenly or emerge over time.
Eventually, the accumulation of cholesterol may lead to the development of plaque deposits, creating further blockages within the arteries. When this occurs, this is known as atherosclerotic coronary artery disease (via University of Ottawa Heart Institute).
Reddick was cremated, as outlined in his death certificate.