Dr. Joseph R. Zenisek

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 a Distinguished provider by MediFind in the treatment of Paroxysmal Ventricular Fibrillation. His top areas of expertise are Atrial Fibrillation, Arrhythmias, Dilated Cardiomyopathy (DCM), Pacemaker Implantation, and Cardiac Ablation.

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

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 Paroxysmal Ventricular Fibrillation. His top areas of expertise are Coronary Heart Disease, Heart Attack, Atherosclerosis, Heart Bypass Surgery, and Cardiac Ablation.