What is the effect of brief periods of mental stress,based on laboratory experiments with cardiology patients

A)  They have little, or no, impact on overall cardiac function. 
B)  They can intensify chronic symptoms of heart disease, such as atherosclerosis. 
C)  They can trigger acute symptoms of heart disease. 
D)  They can trigger emotional responses such as depression and feelings of despair.

Mental Stress

Psychological pressure or tension resulting from adverse or demanding circumstances.

Cardiology Patients

Cardiology patients are individuals receiving medical attention for conditions related to the heart and the body's networks of blood vessels, including coronary artery disease, heart rhythm disorders, and heart failure.

Acute Symptoms

Symptoms that appear suddenly and are typically severe in nature, but last only a short period of time.