Our Physicians

The physicians and staff of Cardiovascular Medicine are committed to providing quality cardiovascular healthcare.

Dr. Helbert Acosta

MD, FACC, FHRS, CCDS
Dr. Acosta received his undergraduate training at Colegio de Barranquilla para Varones in Colombia and his medical degree from Universidad Del Valle in...

Dr. Waseem Ahmad

MD
Dr. Ahmad graduated from Punjab Medical College Faisalabad, Pakistan. His Internal Medicine Internship was completed at Wilson Memorial Hospital in Johnson...

Dr. Amit Bahia

MD, MPH
Dr. Amit Bahia received his Medical Degree at Bangalore Medical College, Bangalore, India in 2000. He went on to earn a Master’s degree in Public Health from...

Dr. Edmund P. Coyne

MD, FACC
Dr. Coyne received his undergraduate training at Boston University and his medical degree from Tufts University in Boston, Massachusetts. He completed his...

Dr. Blair W. Foreman

MD, FACC
Dr. Foreman received his undergraduate training and his Doctor of Medicine degree from the University of Minnesota. He completed Fellowships in both...

Dr. Michael J. Gimbell III

MD, FACC
Dr. Gimbel, a Bettendorf native, graduated from Assumption High School and received his undergraduate degree from Saint Louis University, majoring in Chemistry...

Dr. Srikanth Kasula

MD
Dr. Srikanth Kasula received his medical education at Osmania Medical College, Hyderabad, India in 2006. He completed his Internal Medicine Residency,...

Dr. Kathleen J. Keyes

MD, FACC
Dr. Keyes was born in Wareham, Massachusetts. She attended Wheaton College in Norton, Massachusetts, where she received her B.A. in Chemistry and Biochemistry....

Dr. Rajiv Mallik

MD
Dr. Rajiv Mallik received his medical school training at All India Institute of Medical Sciences. He completed his residency at Michael Reese Hospital, Chicago...

Dr. Faraz Manazir

MD
Dr. Manazir received his Medical Degree from Dow Medical College, Karachi University, in Karachi, Pakistan. He completed his Internal Medicine Residency at St....

Dr. Rafat Padaria

MD, FACC
Dr. Padaria received her undergraduate training at Jai Hind College in Bombay and her medical degree from Topiwala National Medical College in Bombay, India....

Dr. Aswartha Pothula

MD, FACC
Dr. Pothula received his Medical Degree from the Kurnool Medical College, Kurnool India. He competed his Internal Medicine Residency at Wayne State University,...

Dr. Sanjeev Puri

MD, FACC, FSCAI
Dr. Puri graduated from Post Graduate Institute of Medical Education in Chandigarh, India. He trained in Internal Medicine at the Medical College of Ohio. His...

Dr. Vijay R. Rajendran

MD, FRCP (LON), FACC
Dr. Rajendran received his undergraduate and medical school training in India. He had further training in Internal Medicine at the Royal Hampshire County...

Dr. Bouyella Reddy

MD
Dr. Reddy received his Medical Degree from Kurnool Medical College, Sri Venkateswara University in Kurnool India. He completed his Internal Medicine Residency...

Dr. Sora Reddy

MD
Dr. Reddy received his Medical Degree from Kurnool Government Medical College, Sri Venkateshwara University, in Andhra Pradesh, India. He completed his...

Dr. Jon A. Robken

MD, FCCP, FACC
Dr. Robken was raised in Cedar Rapids, Iowa. He received his Bachelor of Science from the University of Iowa and his Medical Degree from the University of Iowa...

Dr. Nicolas W. Shammas

MD, MS, EJD, FACC, FSCAI, FICA, FSVM
Dr. Shammas received his combined Master of Science-Doctor of Medicine (MS-MD) degrees at the American University of Beirut, Lebanon. He completed his Internal...

Dr. Peter J. Sharis

MD, FACC
Dr. Sharis received his undergraduate training at Massachusetts Institute of Technology and Harvard University and his Medical Degree from Vanderbilt...

Dr. Mark J. Shen

MD, FHRS
Dr. Shen is a Board Certified Cardiac Electrophysiologist and Cardiologist, specializing in treating patients with heart rhythm disorders. He performs complex...

Dr. Param P. Singh

MD
Dr. Singh received his medical education at Government Medical College in Patiala, India. He completed his Internal Medicine Residency, Cardiovascular Disease...

Dr. Phanicharan Sistla

MD
Dr. Sistla received his medical degree from the University of Massachusetts Medical School in 2013.He completed his Internal Medicine Residency at Tufts...

Dr. William J. Witcik

MD, FACP, FACC
Dr. Witcik was born and raised in Fargo, North Dakota. He received his undergraduate degree in biochemistry from North Dakota State University. He received his...

CVM Locations

Explore the map below to see location options and find the clinic most convenient for you!

Our Physicians

Our physicians provide the best care for patients with heart failure, heart attacks, angina, cardiac, and vein diseases.

Dr. Nicolas W. Shammas

MD, MS, EJD, FACC, FSCAI, FICA, FSVM

Dr. Shammas received his combined Master of Science-Doctor of Medicine (MS-MD) degrees at the American University of Beirut, Lebanon.  He completed his Internal Medicine Residency at the University of Iowa Hospitals and Clinics and his Cardiology Fellowship at the University of Rochester Medical Center, Rochester, NY in 1994. He returned to the University of Iowa, Division of Cardiology where he was a Fellow Associate in Interventional Cardiology.

Dr. Shammas has been heavily involved in the research and development of new techniques and procedures and has gained numerous awards and recognition for such. He has published over 400 manuscripts, abstracts, books and book chapters.  In addition, he has been the Principal Investigator or Co-Investigator on over 200 multi-center clinical trials and the primary investigator of over 40 investigator-initiated trials.  He has served on the editorial board of several peer-reviewed journals.  In 1997, he established the Coronary and Peripheral Vascular Research Program at Genesis Medical Center.   In 2002, he founded the Midwest Cardiovascular Research Foundation, an independent non-profit 501c3 public charitable organization, dedicated to cardiovascular research, preventative medicine and education.

Dr. Shammas has been involved in the education of health care providers and the public.  He has established and directed several conferences including Cardiovascular Interventions and Practice Guideline (CIPG), the annual conference of the Midwest Cardiovascular Research Foundation.  He has presented his research and lectured at national and international meetings including Central America, the Middle East, the Far East and Europe.  He was voted as the Preceptor Teacher of the Year in 2002 by the family practice residents at the Genesis Family Residency Training program.

Dr. Shammas is a coauthor on the cardiovascular chapter in the Rakel Texbook of Medicine, and author of the superficial venous disease chapter in the Endovascular Companion of Braunwald, both key references for family practice physicians and cardiologists respectively.  He is also the editor of three textbooks in endovascular medicine. Dr Shammas is an interventional cardiologist with Cardiovascular Medicine; an Adjunct Clinical Associate Professor of Medicine at the University of Iowa Hospitals and Clinics; and Founder, President and Research Director of the Midwest Cardiovascular Research Foundation.

Dr. Shammas is Board Certified in Cardiovascular Disease and Interventional Cardiology by ABIM and in Vascular Medicine and Endovascular Medicine by SVM.   He is a Fellow of several societies including the American College of Cardiology, the International College of Angiology, the Society of Vascular Medicine and the Society of Cardiac Angiography and Interventions.

Dr. Shammas is licensed in both Iowa and Illinois and has staff privileges at Genesis Medical Center and UnityPoint Health Trinity.

Preventive Services

Our team of physicians, advanced care providers, and patient care specialists are focused specifically on cardiovascular best practices and lifesaving heart and vein care.