North Atlanta Cardiologist Dr. Singh. Dr. Singh is a recognized expert on heart health, heart testing and preventative care here in the Atlanta area. If you are experiencing heart disease, heart failure, high blood pressure, racing heart, inflammation, fainting, heart flutters or any other cardiovascular symptom contact our expert teams in Cumming, GA and Johns Creek, CA to help manage and ...Welcome‧Services‧Patient Form‧Patient Resources‧NSC Research‧Our Staff.