Dr. Roberto F. Pereira

Dr. Allen Atchley is board certified in Internal Medicine and Cardiovascular Diseases and also holds specialized board certifications in Echocardiography, Nuclear Cardiology and is a Registered Physician in Vascular Interpretation, Vascular Ultrasound. He completed his fellowship in cardiology at Duke University Medical Center where he further pursued advanced training with a specialized fellowship in non-invasive cardiovascular imaging. Dr. Atchley also completed his internship and residency in Internal Medicine at Duke.Dr. Atchley performed the first 3D Transesophageal Echo (TEE) in Chattanooga in March of 2011 and is one of only a few cardiologists level 3 trained in echocardiography and nuclear cardiography in the area. While at Duke University, he participated in research focused on echo and nuclear cardiology.Dr. Atchley and his wife have four young children—twin girls, a daughter one year younger and the youngest, a son. His leisure time is spent enjoying activities with his family. Dr. Atchley is a former All-American golfer. Dr. Atchley is rated as a Distinguished provider by MediFind in the treatment of Cor Pulmonale. His top areas of expertise are Mitral Valve Regurgitation, Coronary Heart Disease, Atherosclerosis, Heart Bypass Surgery, and Pacemaker Implantation.

Andrew J.P. Klein, M.D., FACC, FSCAI, earned his bachelor's degree from University of Notre Dame and his medical degree from MCP Hahnemann School of Medicine in Philadelphia. He completed his residency in internal medicine at University of California San Francisco. He then completed fellowships in cardiovascular disease and interventional cardiology at University of Colorado Health Sciences and a fellowship in clinical research at the University of Wisconsin.Prior to joining Piedmont, Dr. Klein was in practice at the John Cochran VA Medical Center in St. Louis where he served as the Director of Cardiovascular Disease Research and the Director of the Endovascular Laboratory. While there, he was named for the last 3 years as one of St. Louis's Top Doctors by Saint Louis Magazine. Board certified in endovascular medicine, vascular medicine, interventional cardiology and cardiovascular diseases and internal medicine, Dr. Klein is an fellow of the American College of Cardiology (ACC) and Society for Cardiovascular Angiography and Intervention.(SCAI). An expert in complex coronary and peripheral intervention, he is a member of several SCAI committees.In his spare time, Dr. Klein enjoys spending time with family, including his spouse Christina Klein, M.D., who is a transplant physician at Piedmont, and their two beautiful children. Dr. Klein is an avid exercise fanatic having run several marathons and triathlons. He is also an outdoor enthusiast having backpacked across Joshua Tree National Park and summited Half Dome with Christina when they were residents together at UCSF. The entire Klein family are skiers and look forward to returning each year to the mountains for moguls, deep powder and glade skiing. Dr. Klein welcomes new patients and accepts most insurance plans. Dr. Klein is rated as a Distinguished provider by MediFind in the treatment of Cor Pulmonale. His top areas of expertise are Peripheral Artery Disease, Atherosclerosis, Coronary Heart Disease, Lithotripsy, and Embolectomy.

Matthew Wiisanen is an Interventional Cardiologist and a Cardiologist in Chattanooga, Tennessee. Dr. Wiisanen is rated as an Advanced provider by MediFind in the treatment of Cor Pulmonale. His top areas of expertise are Apoplexy, Atrial Fibrillation, Heart Attack, Transcatheter Aortic Valve Replacement (TAVR), and Aortic Valve Replacement. Dr. Wiisanen is currently accepting new patients.