Mary Coughenour , Cardiac Rehabilitation Nurse Mary P. Coughenour, RN, BSN, works as the Cardiac Rehabilitation Nurse in the Wellness Department. As the Cardiac Rehab Nurse, Mary works with patients that have had cardiac bypass surgery, MI (heart attack) an/or have stints, angioplasty, or PTCA's placed. Mary also does patient and family education in regards to medication, diet and exercise. scmcnevada.org