Our Services CIS provides a full range of cardiovascular care, from prevention to diagnostics and treatment. Offering 24/7 virtual care, outpatient procedures, in-clinic vein treatments, care management and so much more, CIS is your premier cardiology provider. Leg & Vein Treatments Outpatient Procedures 24/7 Virtual Care Research Trials Keep Up with All Things CIS About CIS Find a Physician Leg & Vein Center Who We Are The CIS mission is to provide our patients with the highest-quality cardiovascular care available. Discover how our team continues to be a leader in the development of new techniques and technologies in the treatment of both coronary and peripheral diseases. Meet CIS Testimonials Leg & Vein Center The Leg & Vein Center at Cardiovascular Institute of the South diagnoses and treats cardiovascular conditions in the legs, such as peripheral artery disease and vein disease. Our cardiologists are among the most-renowned venous disease specialists in the nation. Learn More