Souljah,
I worked with a preventive cardiologist after my first year of med school, and he didn't do a whole lot in terms of lifestyle change. He would refer patients to our wellness center, which has dietitians and exercise physiologists, but he did very little counseling on nutrition or exercise himself. He basically did a quick physical exam, played with the patient's meds based on the side effects he or she was having and the desired changes in lipids, and referred for everything else. He was also big into research, though, and only had clinic 2 mornings a week. The rest was research time (mostly on CRP and inflammation and heart disease). Maybe non-academic preventive cardiology would be different.