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Dr. Arun Narayanan is a Clinical Electrophysiologist and an Assistant Professor of Medicine in the Division of Cardiology at UTMB. He completed his medical training at the American University of Antigua, followed by his residency in Internal Medicine at the University of Texas Health Science Center in Houston. His interest in cardiology led him to pursue a fellowship in Cardiovascular Disease at New York Presbyterian Brooklyn Methodist Hospital where he was Chief Fellow. He then completed his advanced fellowship training in Clinical Cardiac Electrophysiology at Tufts Medical Center in Boston.

Dr. Narayanan specializes in the diagnosis and management of cardiac arrhythmias, including catheter ablation for atrial fibrillation, supraventricular tachycardia, and ventricular tachycardia, as well as cardiac device implantation for treatment of slow heart rhythms and prevention of sudden cardiac death. He has published several manuscripts and presented at national conferences including Heart Rhythm Society, American College of Cardiology, and American Heart Association. His research interests include hypertrophic cardiomyopathy, sudden cardiac death, and subcutaneous implantable cardioverter-defibrillators.

Dr. Narayanan is a proud, native Texan. He loves traveling, Houston sports, and spending lazy weekends at home with his wife and son.

Dr. George Carayannopoulos was born and raised in Dallas, Texas and completed all of his academic and medical training in the University of Texas educational system. After completion of his Cardiac Electrophysiology training at the University of Texas Southwestern Medical Center, he was selected as one of six cardiologists to care for all of the international athletes and staff residing in the Olympic Village for the 2004 Athens Olympic Games. Upon the completion of the Olympic Games in Athens, Greece, Dr. Carayannopoulos moved to Long Island, New York where he started Heart Rhythm Consultants of New York a practice created to address the cardiac electrophysiology needs of the community on Long Island.

During his time in New York he held the position of Clinical Assistant Professor of Medicine at the State University of New York – Stony Brook University Hospital. He also served in several leadership positions including Director of Cardiac Electrophysiology at St. Catherine of Siena Hospital, Vice-chair of Suffolk County H.E.A.R.T. (a task force he created in conjunction with the Suffolk County Health Commissioner to raise the awareness of heart disease in the community), Co-Founder of Suffolk County Life Savers (support group for at risk patients and survivors of Sudden Cardiac Arrest), and Vice President of the New York Hellenic Medical Society.

He is actively involved in the Heart Rhythm Society and has served on its Reimbursement and Regulatory Committee for six years. He is an international speaker and gives many lectures annually on Sudden Cardiac Arrest, Syncope, Congestive Heart Failure, and Medical Practice Building. In June 2010 he received Greek America Magazine's 40 most influential young Greek-Americans award. Dr. Carayannopoulos and his wife are active members in the Greek Orthodox community, and they enjoy living on Galveston Island.

Dr Motiwala is an Interventional Cardiologist with expertise in catheter-based management of coronary, peripheral vascular, and structural heart disease. He has had a strong interest in cardiovascular diseases since the early days of medical school. After medical school he completed residency training in Dallas, TX and then moved to Chicago for his Cardiology fellowship. He moved to Philadelphia for his Interventional Cardiology fellowship and is excited to be back to Texas as Assistant Professor at UTMB. When not working, Dr Motiwala enjoys travelling and spending time with his family. He is also an avid runner and enjoys various sports in his free time.

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Dr. Shalaby graduated with honors from the University of Cairo, Egypt. After moving to USA, he completed his Residency in Internal Medicine from the University of Miami Regional Campus in 2012. He began his academic career as an assistant professor of Medicine at Case Western Reserve University in Cleveland, Ohio, where he also received an award for Teaching Excellence. Thereafter, Dr. Shalaby pursued fellowship training in Cardiovascular Diseases at UTMB from 2015-2018. After fellowship graduation he joined UTMB as an Assistant Professor in Invasive Cardiology.

His professional interests include cardiac imaging, clinical cardiology, congenital heart diseases and medical education. He is board certified in Echocardiography, Nuclear Cardiology, and Internal Medicine. Dr. Shalaby sees patients at the UTMB Primary & Specialty Care Clinic in Texas City and at the UTMB Clear Lake Campus Clinic Building in Webster, TX.

Dr. Raja is a clinical Assistant Professor of Medicine at UTMB Division of Cardiology. He completed his medical residency training from Texas Tech University and Cardiology Fellowship from Tulane University School of Medicine, New Orleans, LA. He joined UTMB Division of Cardiology for his sheer interest in academic medicine and teaching.

His clinical interests include preventive cardiology, non-invasive cardiac imaging, general cardiology, invasive cardiology and medical education. He is actively involved in teaching and training Cardiology fellows and residents during inpatient services at UTMB Jennie Sealy Hospital and TDCJ. His philosophy of treating patients is to treat them like his family with great compassion and respect. He focuses to provide best, affordable and evidence-based care.

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Dr. Rangasetty completed his fellowship training in cardiovascular medicine and interventional cardiology at the University of Texas Medical Branch in Galveston, TX. He joined UTMB as Assistant Professor of Medicine in Interventional Cardiology in 2011. Dr. Rangasetty has focused on all aspects of interventional cardiology here at UTMB. As Associate Director of the Cardiac Catheterization Laboratory at Jennie Sealy Hospital, he has contributed significantly to the establishment of trans-radial, complex coronary and structural interventions. He has worked closely with cardiac surgeons and other interventional cardiologists to establish a TAVR program.

Dr. Rangasetty is the Director of the Interventional Cardiology Fellowship Program, and enjoys mentoring and coaching interventional fellows. Dr. Rangasetty is passionate about his career and loves spending his time in the catheterization laboratory. His intervention skill set consists of: complex coronary lesions (CHIP), transcatheter aortic valve replacements (TAVR), Left atrial appendage closure with watchman device, atrial septal defect and patent foramen ovale (PFO) closures, balloon aortic valvuloplasty, mitral valvuloplasty, percutaneous pulmonary valvuloplasty, cardiomems, and paravalvular leak closures. He also performs carotid, renal, iliac and SFA interventions.

Dr. Joseph Allencherril is a UTMB Cardiologist with a specialization in Clinical & Interventional Cardiology. His clinical interests include coronary artery (CAD) prevention and management, peripheral vascular disease (PVD), hypertension, hypercholesterolemia, valvular and structural heart disease, multi-modality cardiac imaging (echocardiography, cardiovascular CT and nuclear cardiology), and vascular medicine. He is dedicated to the education of medical students, residents, and fellows.