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Physicians and Staff

James F. Ganem, MD

Dr. James F. Ganem was born in Louisville, Kentucky and raised in Phoenix, Arizona, attending Camelback High School and graduating from the University of Arizona in 1980. Medical training began at the University of Louisville, School of Medicine where he graduated in 1985. Training completed following Medical School: Internship, Carney Hospital, Boston, MA, Residency, Maricopa Medical Center, Phoenix, AZ, Cardiology Fellowship: Good Samaritan Medical Center, Phoenix, AZ, Veterans Administration Medical Center, Phoenix, AZ.

Dr. Ganem founded East Valley Cardiology in 1990.  He served as the Medical Director of the Cardiac Cath Lab at Banner Desert Medical Center from 2006-2013. He is board certified in Internal Medicine, Cardiology, Interventional Cardiology and Echocardiography.

In 2014, Dr. Ganem was selected as a "Top Doc" for cardiovascular disease by PHOENIX Magazine.

Robert A. Hanson, DO FACOI

Dr. Robert Hanson attended Michigan State University for his bachelors, graduate and medical school education. He graduated medical school in 2005.  He underwent internship training at Henry Ford hospital, in Detroit, Michigan, and went on to complete his Internal medicine residency (2008) and Cardiology fellowship (2011) at Pontiac Osteopathic Hospital, in Pontiac Michigan.

His other interests include Tropical and Travel Medicine.  He has been actively involved in clinical and laboratory based research and has received 2 research scholarships from the National Institutes of Health (NIH) and has conducted collaborative research with the Centers for Disease Control and Prevention (CDC).

Dr. Hanson served in the U.S. Air force from 1987-1991 (Desert Shield / Storm). After his honorable discharge, he attended Michigan State University to further his education.  He served as the Director of Cardiovascular Services at the Battle Creek and Wyoming Michigan Veteran's Affairs Hospital  for about 2.5 years prior to joining us. He is board certified in Internal and Cardiovascular Medicine and is a strong advocate of disease prevention through healthy lifestyle and nutritional choices.

Erica M. Flores, MD

Dr. Erica Flores was born and raised in Los Angeles, California. She completed her undergraduate training at Whittier College. Her medical training began at the Medical College of Wisconsin where she graduated in 2011. Dr. Flores completed her Internship and Residency at Banner Good Samaritan Medical Center in Phoenix, AZ, followed by a Vascular Medicine fellowship at the University of Southern California. She then completed her Cardiology Fellowship training at the University of Arizona College of Medicine-Phoenix in 2018 where she served as Chief Cardiology Fellow. She is board-certified in Internal Medicine, Nuclear Cardiology, Echocardiography and Vascular Interpretation.

Dr. Flores is currently serving as an early career representative for the Society of Vascular Medicine. She attributes this to her immense interests in vascular medicine. As an advocate for patient education, Dr. Flores writes for the American College of Cardiology: CardioSmart. Additionally, she is a passionate advocate for women’s health and is working with the American Heart Association to increase awareness of cardiovascular disease in women with community events. She remains involved with the cardiology fellowship program at the University of Arizona College of Medicine-Phoenix through teaching.


Dr. Ravi Kahlon was born and raised in Southern California. He completed his medical training at Boston University school of medicine and graduated in 2011. He completed his internship and internal medicine residency at Cedar Sinai Medical Center. He then went on to complete his cardiology fellowship at the University of California Davis. He completed an interventional cardiology fellowship at Banner University Medical Center in Phoenix, Arizona. He then went on to complete a Vascular and Endovascular fellowship at Brown University, followed by a structural heart fellowship at Swedish Medical Center in Seattle, Washington.

Dr. Kahlon is a fellow of the American College of Cardiology, The Society for Cardiovascular Angiography and Interventions, the fellow of the Society of Vascular Medicine. He is Board Certified Internal Medicine, Cardiology, Interventional Cardiology, Echocardiography, and Vascular Interpretation. He is a strong advocate for his patients and believes strongly in patient education.

James Kneller, MD

Dr. James Kneller is one of the nation’s leading heart rhythm specialists. Dr. Kneller is certified by the American Board of Internal Medicine (ABIM) in Clinical Cardiac Electrophysiology, Cardiovascular Disease, and Internal Medicine. As a Fellow of the Heart Rhythm Society (FHRS) and Certified Cardiac Device Specialist (CCDS), Kneller provides comprehensive patient care, combining best medical practice with invasive procedures using state-of-the-art technologies to treat heart rhythm disorders.

Dr. Kneller earned his medical degree from McGill University, Montreal QC, Canada. In addition he hold a Ph.D. in Pharmacology from McGill University, a M.Sc. in Bioengineering from the University of Pittsburg, PA and a B.Sc. in Mechanical Engineering , Magna Cum Laude with a minor in mathematics from Walla Walla, University, College Place, WA. He has completed a cardiovascular fellowship at New York Presbyterian, Columbia University Medical Center and Clinical Cardiac Electrophysiology Fellowships at the Medical College of Virginia, Richmond, VA and UCLA Cardiac Arrhythmia Center, David Geffen School of Medicine, Ronald Regan UCLA Medical Center, University of California, Los Angeles, CA.

Dr. Kneller holds appointments as Associate Clinical Professor, Internal Medicine, University of Arizona College of Medicine, Phoenix, AZ. He is Adjunct Clinical Associate Professor, Pacific Northwest University of Health Sciences, Yakima, WA and Clinical Assistant Professor, Elson S. Floyd College of Medicine, Washington State. Dr. Kneller has numerous research publications in the area of electrophysiology. He performs peer review for multiple scientific journals, and serves on the Editorial Board of EP Lab Digest.

Outside of medicine, he enjoys waterskiing, snow skiing, the performing arts, international travel, reading, and gardening.

Melissa J. Mattison, NP

Melissa Mattison is a Family Nurse Practitioner and joined East Valley Cardiology in 2014. She is originally from South Dakota and earned a dual Bachelor’s Degree in biology and business from Arizona State University in 2005.  She then received Associates in Nursing from Gateway Community College in 2008. Melissa practiced as a Registered Nurse in the Cardiovascular Intensive Care Unit at Banner Heart Hospital and brings with her a wealth of knowledge and experience in caring for patients with complex cardiovascular disease.  Melissa earned her Master of Science in Nursing from Grand Canyon University in 2013.  She then received a national certification from the American Association of Nurse Practitioners in family practice. Melissa and her husband, Jeff, have two beautiful boys, Jacob and Jase.

Jamie L. Harris, NP

Jamie Harris is a Family Nurse Practitioner from Lincoln, Nebraska. She recently moved to Arizona to be closer to family and to escape the long midwestern winters. Jamie earned her Registered Nursing Diploma degree from Bryan College of Health Sciences in 1999, then later returned to Bryan to complete her bachelor’s degree in the Science of Nursing. She practiced as a Registered Nurse at the Nebraska Heart Hospital, in Lincoln Nebraska, for 15 years where she specialized in interventional cardiology, electrophysiology, and vascular services. In 2019 she earned her Masters degree in Nursing from Clarkson College in Omaha, Nebraska. Jamie obtained national certification from the American Association of Nurse Practitioners in family practice. In her free time Jamie enjoys reading, hiking, golfing, and spending time with her family.

Katherine E. Reynolds, FNP-C

Katherine Reynolds is a Certified Family Nurse Practitioner. She is originally from Illinois where she attended Illinois State University to earn a Bachelor’s Degree in Nutrition.  She returned for a second Bachelor’s of Science in Genetic Biology. Katherine became a Registered Nurse in 2010 after receiving an  Associates Degree in Nursing from Parkland College in Champaign, Illinois. She has practiced as an Registered Nurse across multiple specialized units at Advocate Bromenn Hospital in Normal Illinois. In 2014, Katherine and her family moved to Arizona where she worked at Mercy Gilbert Medical Center until earning her Master’s Degree in Nursing from Grand Canyon University in 2019 to become a Family Nurse Practitioner. She is passionate about empowering patients with knowledge to make educated choices for their own health. Katherine enjoys reading mysteries, traveling to new places and spending time with her husband and children.