[Solved] The most common cause of sudden cardiac death, defined as occurring within 1 hour after onset of the first symptoms, in 50-year-old men is A) aortic valve stenosis B) mitral valve prolapse C) atherosclerotic coronary heart disease D) cardiomyopathy E) hypertensive heart disease Neurotransmitter Activity: The process by which chemicals in the brain are released and received by neurons, facilitating communication between brain cells. Antidepressant Drugs: Medications used to treat depressive disorders by altering chemicals in the brain associated with mood regulation. Chemical Models: Representations or simulations of chemical processes, used for scientific research or educational purposes to understand and predict the interactions at the molecular level. Gender Difference: Variations in characteristics, behaviors, or traits between males and females, often influenced by a combination of biological, social, and cultural factors.