Dr. William (Bill) Warren is a cardiologist specializing in non-invasive and imaging cardiology. He is board-certified in Internal Medicine, Cardiovascular Disease, Nuclear Cardiology, and Echocardiography. Dr. Warren graduated summa cum laude from Princeton University, earned his Doctor of Medicine degree at Harvard Medical School, completed his internal medicine internship and residency at Massachusetts General Hospital, and finished a cardiology fellowship at Johns Hopkins Hospital. His areas of focus include a wide range of cardiovascular conditions and treatments, with expertise in non-invasive diagnostic studies.Since joining The Chattanooga Heart Institute in 2003, Dr. Warren has become a valued leader at CHI Memorial and in the Chattanooga medical community. He currently serves as managing partner of The Chattanooga Heart Institute, where he collaborates with over 30 colleagues. He previously chaired the CHI Memorial Board of Directors.Dr. Warren possesses a broad range of clinical interests and expertise. His dedication to patient care stems from a deep love of science combined with a genuine ability to connect with patients on a personal level. The complexity and diverse treatment options within cardiovascular care drew him to this field, allowing him to help critically ill patients recover and thrive. He was the recipient of CHI Memorial’s inaugural St. Luke’s Healer’s Heart award which recognizes physicians and providers for demonstrating compassion, inclusion, integrity, excellence and collaboration.Dr. Warren's commitment extends beyond clinical practice. He has conducted research studies which have been published in prestigious journals including the American College of Cardiology Current Journal Review, Circulation, Journal of Infectious Diseases, Journal of Clinical Microbiology, and Journal of Clinical Research.Away from work, Dr. Warren enjoys nature photography and travel. He has visited all seven continents. Dr. Warren is rated as a Distinguished provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Coronary Heart Disease, Atherosclerosis, Angina, Pacemaker Implantation, and Heart Bypass Surgery.

Dr. Ledford completed an internship and residency in Internal Medicine at the National Naval Medical Center at Bethesda. Dr. Ledford completed a fellowship in Cardiovascular Disease at the National Naval Medical Center at Bethesda and a fellowship in Interventional Cardiology at William Beaumont Hospital in Royal Oak, MichiganDr. Ledford was the first cardiologist in this region to perform a percutaneous patent foramen ovale (PFO) closure on an adult patient. This implant is less invasive than open heart surgery thereby posing fewer risks to the patient.Dr. Ledford served for 22 years in the United States Navy receiving numerous awards. He has been published in professional journals and has been the principal investigator on several research projects.Dr. Ledford enjoys outdoor activities especially hiking, camping, boating and travel. He loves to share those, especially with the grandkids. Dr. Ledford is rated as a Distinguished provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Coronary Heart Disease, Heart Attack, Atherosclerosis, Heart Bypass Surgery, and Cardiac Ablation.

Joseph Zenisek is a Cardiologist and an Interventional Cardiologist in Chattanooga, Tennessee. Dr. Zenisek has been practicing medicine for over 17 years and is rated as an Experienced provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Angina, Coronary Heart Disease, Atherosclerosis, Heart Failure, and Heart Bypass Surgery. Dr. Zenisek is currently accepting new patients.

Lisa Carkner is a Cardiologist in Chattanooga, Tennessee. Dr. Carkner is rated as an Advanced provider by MediFind in the treatment of Brugada Syndrome. Her top areas of expertise are Mitral Valve Regurgitation, Necrosis, Aortic Regurgitation, Coronary Heart Disease, and Pacemaker Implantation. Dr. Carkner is currently accepting new patients.

Dr. Aditya Mandawat is board certified in Internal Medicine, in Cardiovascular Diseases and in Interventional Cardiology. He also holds specialized board certifications in Echocardiography and Cardiac MRI. He completed Fellowships in Cardiology, Cardiovascular Diseases Research, Advanced Cardiovascular Imaging and Interventional Cardiology at Duke University Hospital in Durham, NC. Dr. Mandawat completed his internship and residency at Brigham and Women’s Hospital in Boston, MA. He earned a degree in medicine at Case Western Reserve University with clinical rotations at the Cleveland Clinic and earned a Bachelor of Science degree in biomedical engineering from Georgia Tech University. Dr. Mandawat is rated as an Advanced provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Heart Attack, Angina, Coronary Heart Disease, Heart Bypass Surgery, and Percutaneous Coronary Intervention (PCI).

Dr. Robert Huang is board certified in Internal Medicine and Cardiovascular Diseases and specializes in interventional cardiology. He completed fellowships in cardiology and interventional cardiology at Vanderbilt University Medical Center where he also earned a Masters of Public Health. He earned his Doctor of Medicine degree at Case Western Reserve University School of Medicine where he also earned a Bachelor of Science in Biomedical Engineering.Dr. Huang served his internal medicine internship and residency at Vanderbilt University Medical Center. He served as Clinical Assistant Professor at the University of Tennessee College of Medicine at Chattanooga. Dr. Huang has practiced cardiology in Chattanooga since 2011 and is the author of numerous professional papers in the field of cardiology. Dr. Huang is rated as an Advanced provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Heart Attack, Angina, Coronary Heart Disease, Heart Bypass Surgery, and Angioplasty.

Dr. Ondrej Lisy completed his internship and internal medicine residency at the Mayo Clinic College of Medicine in Rochester, MN. Also at the Mayo Clinic in Rochester, he completed his fellowship in cardiovascular diseases with the clinician investigator track which was followed by additional fellowship training in cardiac imaging. He received his medical degree and Ph.D. degree in cardiovascular physiology from Charles University in Prague, Czech Republic, prior to accepting the Assistant Professor of Medicine position at the Mayo Medical School.He received numerous awards while at the Mayo Clinic including the Young Investigator Award of the Heart Failure Society of America and the American College of Physicians and Donald C. Balfour Award of the Mayo Clinic Alumni Association for Meritorious Research. Dr. Lisy has been published in numerous medical journals including Circulation, Journal of the American College of Cardiology, Hypertension, American Journal of Physiology and Kidney International. Dr. Lisy has been involved in cutting edge research on heart failure for many years including designing peptides for heart failure treatment.Dr. Lisy has expertise in noninvasive cardiology and cardiac imaging modalities after he did his advanced specialty training in nuclear cardiology and echocardiography. He has been instrumental in establishing the Cardiac PET Program at Memorial Hospital where he has served since 2018 as the medical director of the Nuclear Cardiology Laboratory. Dr. Lisy is board certified in cardiology, internal medicine and nuclear cardiology. He is a Fellow of the American College of Cardiology. Dr. Lisy is rated as an Advanced provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Mitral Valve Regurgitation, Necrosis, Arterial Embolism, Coronary Heart Disease, and Heart Bypass Surgery.

Dr. Lehman is board certified in Cardiovascular Disease and specializes in imaging cardiology. He came to Chattanooga Heart from Duke University Health System in Durham, NC. Dr. Lehman completed a fellowship and residency in Cardiovascular Disease at Duke University. He received his medical degree from Duke University School of Medicine and a Master’s of Public Policy, Concentration in Health Policy from Duke University Sanford School of Public Policy. He graduated summa cum laude from Georgetown University with a Bachelor’s of Science, Biology, where he had the highest GPA for all bachelor of science degrees. He served as a congressional aid on Capitol Hill. Dr. Lehman is rated as an Advanced provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Mitral Valve Regurgitation, Aortic Regurgitation, Necrosis, and Arterial Embolism.

A specialist in peripheral vascular disease, Dr. Brian H. Negus joined The Chattanooga Heart Institute from private practice in Gainesville, Georgia, where he also served as director of the cardiology laboratory at Northeast Georgia Medical Center.He received his doctor of medicine degree from the Medical College of Georgia in Augusta and completed both his internship and residency in internal medicine and cardiology fellowship at Parkland Memorial Hospital in Dallas. He conducted his fellowship in interventional cardiology at the University of Alabama at Birmingham, where he then served as assistant professor of medicine in the interventional cardiology section.Dr. Negus’ work with research has included projects conducted at the Medical College of Georgia and Parkland Memorial as well as at the University of Alabama at Birmingham and Emory University in Atlanta, Georgia.Board certified in internal medicine and cardiovascular diseases, he is a member of the Chattanooga-Hamilton County Medical Society. In addition, he is a fellow in the American College of Cardiology and American Heart Association. Dr. Negus is rated as an Advanced provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Arterial Embolism, Coronary Heart Disease, Carotid Artery Disease, Transcatheter Aortic Valve Replacement (TAVR), and Aortic Valve Replacement.

Dr. William F. Oellerich earned his medical degree from the University of Tennessee at Memphis while concurrently earning a doctorate in philosophy in its Department of Pharmacology. He completed his internship and residency in internal medicine and served as chief resident at Barnes-Jewish Hospital at the Washington University School of Medicine in St. Louis, Missouri. He also completed his fellowship in cardiology at Washington University School of Medicine.Dr. Oellerich is board certified in cardiology and echocardiography. He has had specialized training in nuclear cardiology, diagnostic cardiac catheterization, cardiac magnetic resonance imaging, autonomic pharmacology, cardiovascular pharmacology, and echocardiography. He has been published in the American Journal of Roentgenology, Neuroscience and The Journal of Pharmacology and Experimental Therapeutics.He is the director of the echocardiography lab and CT cardiovascular program at Memorial Hospital. He plays an instrumental part in the ongoing progress of the cardiovascular CT program. He is helping to coordinate the introduction of a valve clinic to The Chattanooga Heart Institute. Dr. Oellerich is rated as an Advanced provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Coronary Heart Disease, Atherosclerosis, Aortic Valve Stenosis, and Angina.

Dr. Gregg Shander’s research on the heart’s electrical functions adds a new dimension to The Chattanooga Heart Institute’s renowned electrophysiology expertise. Dr. Shander has been interested in heart rhythm disturbances since he was in medical school. He received the Stanley J. Sarnoff award for cardiovascular research through which he studied rhythm disturbances. He transferred this interest from research into the care of his patients.Dr. Shander earned his doctor of medicine degree at the University of Pittsburgh School of Medicine in Pittsburgh, Pennsylvania, and completed his internal medicine internship and residency at the University of Chicago Hospital. He performed research involving arrhythmias at the University of Amsterdam, The Netherlands, and the University of Chicago. He completed his general cardiology and electrophysiology fellowships at Duke University Medical Center in Durham, North Carolina, where he received further training in cardiac pacing and clinical electrophysiology including radiofrequency ablation.Dr. Shander received the American Heart Association Basic Sciences Research Award from the Chicago Chapter. He has also presented before the American Heart Association’s scientific sessions and at numerous other cardiovascular research symposiums. He has been published in the Journal of Cardiovascular Electrophysiology, the Journal of American Physiology, the Journal of Molecular and Cellular Cardiology, and the supplement to the American Heart Association’s journal, Circulation.|Dr. Shander, his wife, and two children enjoy spending time doing activities as a family. Dr. Shander is rated as an Advanced provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Atrial Fibrillation, Arrhythmias, Dilated Cardiomyopathy (DCM), Pacemaker Implantation, and Cardiac Ablation.

Dr. Vimal Ramjee is board certified in cardiovascular diseases, internal medicine, echocardiography, cardiac CT, and advanced cardiovascular life support. He has received advanced specialty training in transthoracic echocardiography, transesophageal echocardiography and stress echocardiography.He completed a fellowship in cardiovascular disease and advanced cardiovascular imaging and translational research at the Hospital of the University of Pennsylvania in Philadelphia. Dr. Ramjee completed his residency in internal medicine at Emory Hospital in Atlanta. He received his medical degree from Mount Sinai School of Medicine in New York and two Bachelor of Science degrees from Emory University in Atlanta. He has received numerous academic honors and awards. Dr. Ramjee is rated as an Advanced provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Atrial Fibrillation, Mitral Valve Regurgitation, Aortic Regurgitation, Coronary Heart Disease, and Heart Bypass Surgery.

Dr. Carter Hemphill is board certified in cardiovascular diseases, interventional cardiology, endovascular medicine, nuclear cardiology and internal medicine. Dr. Hemphill completed a fellowship in interventional cardiology at Texas A & M College of Medicine/Scott & White Hospital. He completed his residency in internal medicine and cardiovascular disease fellowship at the University of Texas Health Science Center.Dr. Hemphill received his medical degree from the University of South Carolina School of Medicine and a bachelor’s degree from Columbia University in New York. He previously served as a clinical assistant professor at the University of Tennessee Health Science Center College of Medicine at Chattanooga. Dr. Hemphill is rated as an Advanced provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Angina, Atherosclerosis, Coronary Heart Disease, Angioplasty, and Heart Bypass Surgery.

Dr. Samuel Jones is a cardiologist specializing in cardiology and electrophysiology at The Chattanooga Heart Institute. Dr. Jones is board-certified in Cardiovascular Diseases, Clinical Cardiac Electrophysiology and in Internal Medicine. He retired as a Colonel from the United States Air Force and came to Chattanooga from San Antonio Military Medical Center.Dr. Jones earned his medical degree from the University of Alabama at Birmingham and an undergraduate degree from the United State Air Force Academy in Colorado Springs, Colorado. He completed a fellowship in Cardiovascular Disease at Lackland Air Force Base in Texas and a fellowship in Clinical Cardiac Electrophysiology at Brigham and Women’s Hospital in Boston while earning a master’s degree in public health from the Harvard School of Public Health. Dr. Jones had a distinguished military career having served as a Cardiology Consultant and Chief Consultant of Internal Medicine Services to the Air Force Surgeon General. He served as a flight surgeon while based at Eglin Air Force Base in Florida and in Saudi Arabia.|Fascinated by science and fueled by a desire to help relieve suffering, Dr.Jones found cardiology and electrophysiology to be the most intriguing subjects. Cardiology will continue to have incredible technological advances. When working with patients, Dr. Jones stresses each encounter needs to be ethical in terms of acting in the best interest of the patient, treating all patients fairly, and respecting their own right to make their decisions.Outside of work, Dr. Jones enjoys playing golf with his sons, or doing anything with his family. Dr. Jones is rated as an Advanced provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Atrial Fibrillation, Arrhythmias, Sick Sinus Syndrome, Pacemaker Implantation, and Cardiac Ablation.

Dr. Kelly Richardson is a highly experienced physician-scientist and cardiac electrophysiologist with The Chattanooga Heart Institute. She specializes in Cardiology and Electrophysiology, Dr. Richardson is board-certified by the American Board of Internal Medicine in both Cardiovascular Disease and Clinical Cardiac Electrophysiology.A native of Chattanooga, she started her journey by earning her Bachelor of Science degree with highest distinction from the University of North Carolina at Chapel Hill before graduating with high honors from Vanderbilt Medical School. She then completed her Internal Medicine residency at Massachusetts General Hospital and Harvard Medical School in Boston.Because of her passion for cardiology, Dr. Richardson pursued fellowships in Cardiology and Cardiac Electrophysiology at Stanford University, as well as a fellowship in Biodesign, which combined medicine and engineering. Prior to joining The Chattanooga Heart Institute and returning to Chattanooga, she served as a cardiac electrophysiologist and clinical instructor in the San Francisco Bay area.Dr. Richardson believes in the importance of educating her patients about their diagnoses and treatment options. She empowers patients to make informed decisions that align with their wishes. Her journey into medicine stemmed from a love of science and a desire to help others, which she finds fulfilling.She is passionate about her specialty and chose cardiology and specifically electrophysiology because it combines complex problem-solving with hands-on procedures. The field is constantly evolving, especially with advancements in ablation technology, which is both exciting and rewarding.Outside of her professional life, Dr. Richardson enjoys hiking with her husband and children, traveling, and playing tennis. Dr. Richardson is rated as an Advanced provider by MediFind in the treatment of Brugada Syndrome. Her top areas of expertise are Atrial Fibrillation, Fainting, Ectopic Heartbeat, Pacemaker Implantation, and Cardiac Ablation.

Dr. Keith Bruce is a native of Cleveland, Tennessee. He is board certified in internal medicine, cardiovascular, and clinical cardiac electrophysiology.Dr. Bruce specializes in the treatment of cardiac arrhythmias, ablation, heart rhythm disorders, and implantable cardiac devices. He is currently participating in a national trial on atrial fibrillation and has previously participated in multiple preclinical trials for implantable devices and preclinical drug trials.Dr. Bruce is the recipient of numerous significant awards including the Mayo Clinic’s Cardiovascular Diseases Outstanding Achievement Award in 2005. He has made numerous national and international presentations on cardiac topics. Dr. Bruce is rated as an Advanced provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Arrhythmias, Dilated Cardiomyopathy (DCM), Atrial Fibrillation, Pacemaker Implantation, and Cardiac Ablation.

Dr. Stephen Monroe earned his medical degree from the University of South Florida College of Medicine at Tampa and completed his internship, internal medicine residency, and cardiology and interventional cardiology fellowships at the University of Florida College of Medicine in Gainesville. He held the position of assistant professor of medicine in the Division of Cardiology at the University of Florida College of Medicine.Dr. Monroe was one of the first cardiologists in this area to perform radial catheterizations. Currently, Dr. Monroe is involved in a number of cardiology research studies either as principal investigator, co-investigator or sub-investigator, or protocol co-author. The studies range from establishing condition-specific treatment guidelines to examining the safety and efficacy of pharmacological treatments. He is also currently participating in ongoing clinical trials.Dr. Monroe has been published in the American Heart Association’s journal, Circulation, as well as in Progress in Cardiovascular Diseases, The Journal of the American College of Cardiology, The Journal of Heart and Lung Transplantation, and The American Heart Journal.|He has co-authored chapters in the books Cardiology and Cardiovascular Therapeutics, A Companion to Braunwald’s Heart 2nd Edition and has presented before the members of the Society for Cardiac Angiography and Interventions. Dr. Monroe is board certified in cardiology and is a member of the Chattanooga-Hamilton County Medical Society.Dr. Monroe is an avid hiker. He and his family enjoy many outdoor activities. Dr. Monroe is rated as a Distinguished provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Angina, Coronary Heart Disease, Atherosclerosis, Heart Bypass Surgery, and Advanced Bronchoscopy.

Dharmendrakumar Patel is a Cardiologist in Chattanooga, Tennessee. Dr. Patel is rated as an Advanced provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Long QT Syndrome, Long QT Syndrome 5, Timothy Syndrome, Pacemaker Implantation, and Aortic Valve Replacement.

Kinsman Wright is a Cardiologist in Chattanooga, Tennessee. Dr. Wright is rated as an Advanced provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Inappropriate Sinus Tachycardia (IST), Familial Ventricular Tachycardia, Long QT Syndrome, and Long QT Syndrome 3.

Harish Manyam is a Cardiologist in Chattanooga,, Tennessee. Dr. Manyam is rated as an Advanced provider by MediFind in the treatment of Brugada Syndrome. His top areas of expertise are Atrial Fibrillation, Arrhythmias, Paroxysmal Supraventricular Tachycardia (PSVT), Pacemaker Implantation, and Cardiac Ablation.