Wellstar Center for Cardiovascular Care

A native of Puerto Rico, Dr. Ada Mercado received her undergraduate degree from InterAmerican University and attended medical school at Pedro Henríquez Ureña. She completed her internal medicine residency in the Mayagüez Medical Center and her cardiovascular disease fellowship at Ponce School of Medicine & Health Sciences St. Luke's Episcopal Hospital. Dr. Mercado then completed an echocardiography fellowship at Tulane and Louisiana State University in New Orleans, LA. She also completed nuclear cardiology training at Emory University in Atlanta.

Dr. Mercado is board-certified in cardiovascular disease. She is a member of the American College of Cardiology and American Echcoardiography Society. Her special interests include general cardiology, transthoracic and transesophageal echocardiogram, and nuclear cardiology.

She joined Wellstar in January 2011 from the Atlanta Heart Center where she was a founding physician in 2002.

Dr. Stephanie Wang, a Cardiac Electrophysiologist, is an Atlanta native proud to return home and serve her community as part of the Wellstar Cardiology Team. She earned her Undergraduate Degree from the Massachusetts Institute of Technology (MIT) and her medical degree from Washington University School of Medicine in St. Louis. She did her Internal Medicine Residency at Johns Hopkins Hospital.

Dr. Wang then went on to complete fellowships in both Cardiovascular Disease and Clinical Cardiac Electrophysiology at Emory University School of Medicine. Prior to joining Wellstar, she practiced in Madison, Wisconsin, where she treated a wide range of Arrhythmias and performed advanced Electrophysiology procedures, including Catheter Ablations and Device Implantations.

Board-certified in Internal Medicine, Cardiovascular Disease, and Clinical Cardiac Electrophysiology, Dr. Wang is fully trained in complex comprehensive Electrophysiology care. Her clinical interests include Atrial Fibrillation, including Concomitant Ablation and Watchman Implant, Pacemaker and Defibrillator Therapy, and Long-Term Rhythm Management.

Outside of work, Dr. Wang and her husband Mircea, an Interventional Radiologist, enjoy traveling internationally, music and culture immersions, and exercising. She’s thrilled to be back in Atlanta and looks forward to building long-term relationships with patients in the community she’s always called home!

Dr. Brett Tomashitis is a Cardiac Electrophysiologist with specialized expertise in the diagnosis and treatment of Heart Rhythm Disorders. Dr. Tomashitis earned his Bachelor of Science in Biochemistry and Microbiology from Clemson University, graduating from the Calhoun Honors College Summa Cum Laude with Faculty Honors.

He received his Medical Degree from the Medical University of South Carolina (MUSC) and was inducted into the Alpha Omega Alpha Honor Society. He continued his Internal Medicine Residency and Cardiovascular Disease Fellowship at MUSC. He then further specialized in Cardiac Electrophysiology at Emory University, serving as Chief Fellow.

Dr. Tomashitis specializes in Cardiac Electrophysiology including complex Arrhythmia Management, Cardiac Implantable Electrical Devices (Pacemakers, Defibrillators, Cardiac Resynchronization Therapy, Leadless Technology), extraction, and Advanced Ablation. His interests include Leadless Technology and Complex Ablation of Atrial Fibrillation and Ventricular Tachycardia, including utilization of Pulsed Field Ablation. Dr. Tomashitis is Board-certified in Internal Medicine and Cardiovascular Disease and is Board-Eligible in Cardiac Electrophysiology. He is a member of the American College of Cardiology and Heart Rhythm Society.

Dr. Tomashitis was born and raised in Columbia, SC. In his free time, he enjoys international travel, scuba diving, and fitness.

Dr. Amar Patel received his medical degree from the Medical College of Georgia. He completed his internship and residency at the University of Alabama at Birmingham and went on to complete a fellowship in cardiovascular disease and interventional cardiology at Emory University. Dr. Patel is a professional member of the American College of Cardiology and the Society of Cardiac Angiography and Intervention.

Dr. Patel is board-certified in cardiovascular disease and interventional cardiology. He is a member of several medical and professional societies. He has advanced training in cardiac and peripheral vascular imaging and extensive experience in clinical research. Dr. Patel's areas of interest include: percutaneous coronary intervention, structural heart disease/congenital heart defects, and valvular hear disease.

Dr. Patel joined Wellstar in August 2007. He is currently on staff at Wellstar Cobb, Douglas, Kennestone and Paulding hospitals. When not at work, Dr. Patel loves to spend time with his wife and children. He also enjoys traveling and reading.

Dr. Riley, a cardiac electrophysiologist, received his bachelor’s degree in chemistry and philosophy from the Rockhurst University in 1996, and went on to attend medical school at Georgetown University. After completing his internship and residency at Barnes Hospital in St. Louis, he completed his cardiovascular disease training at The Cleveland Clinic Foundation. He then spent two years at Emory University.

Dr. Riley is board-certified in internal medicine, cardiovascular disease and cardiac electrophysiology. He worked with Solaris Heart for two years before joining us at Wellstar Center for Cardiovascular Care.

A native of New Orleans, Dr. Reitman is a board certified cardiologist who graduated with a bachelor’s degree in English Literature from Washington University in St. Louis in 1991 and then earned a medical degree from Louisiana State University, New Orleans, in 1995. After completing an internship and residency in internal medicine at Tufts Affiliated Hospitals in Boston, MA, Dr. Reitman completed a Cardiovascular Disease Fellowship at Brown University, Providence, R.I. After an Interventional Fellowship at The Mount Sinai School of Medicine in New York, completed 2002, Dr Reitman started clinic practice in Marietta , GA.

Instrumental towards bringing interventional cardiology and cardiac surgery to Cobb County, Dr Reitman has been a perennial high volume operator, and has played an integral role in the development of Complex PCI, Cardiogenic Shock and Structural Heart Teams for Wellstar Health Systems. Teaching activities have involved live rotational atherectomy courses and complex interventional courses for interventional physicians from around the country.Starting as a three-physician interventional group at one hospital, Dr Reitman helped grow an interventional program that now touches a broad geography across the Atlanta metropolitan area, represented by over 18 interventional physicians in 9 separate cardiac cath labs. He has served as the system level cardiac catheterization lab director since 2009.

Dr Reitman has been involved in a number of coronary and structural heart trials in collaboration with other Wellstar physicians, including trials involving the Synergy and Onyx platforms, the Edwards Sapien and Evolut valves. Reitman has been involved with the Georgia Chapter of the American College of Cardiology since his arrival in Atlanta in 2002 .

Dr. McKee graduated from Georgia Institute of Technology and received his medical degree from the Medical College of Georgia. He completed his internship, residency, Cardiovascular Disease fellowship and interventional cardiology fellowship at Wake Forest University Baptist Medical Center in Winston-Salem, N.C.

Dr. McKee is board certified in cardiology and interventional cardiology. His special interests are in complex coronary interventions and revascularization of chronically occluded coronary arteries, exercise stress testing, echocardiography and platelet biology and function. Dr. McKee joined Cardiovascular Medicine in August 2007. He is currently on staff at Wellstar Cobb, Douglas, Kennestone and Paulding hospitals. During his leisure time, he enjoys boating, fishing, camping and spending time with his wife and children.