Our specialists.

Oleg Ivanov

Cardiologist

Dr. Ivanov is a board-certified internal medicine physician specializing in cardiovascular disease and has been practicing cardiology in Wyoming since 2011. He earned his medical degree from Bukovinian State Medical University in Ukraine and completed his internal medicine residency through Yale New Haven Health, followed by cardiology fellowship at University of North Carolina, Chapel Hill. He also completed postdoctoral research fellowship in Biomedical Informatics and Artificial Intelligence in Medicine at the University of Pittsburgh.

Dr. Ivanov is a member of the American College of Cardiology and has provided cardiology care to patients throughout communities across Wyoming for more than 15 years. He speaks English, Ukrainian, and Russian.

Outside of medicine, he enjoys traveling, hiking, fishing, playing chess, and tweaking computers and tech of all sorts.

Allan Wicks

Cardiologist

Dr. Wicks is a cardiologist with nearly 30 years of experience in cardiovascular medicine. He earned his medical degree from Temple University in Philadelphia, Pennsylvania, and completed his internal medicine residency at Oregon Health Sciences University in Portland, followed by a fellowship in cardiovascular medicine at Madigan Army Medical Center in Tacoma, Washington.

In addition to caring for patients, Dr. Wicks has a longstanding commitment to medical education. Since 2012, he has served as an Adjunct Clinical Faculty Member in Family Medicine and Cardiology with the University of Wyoming, helping educate and train the next generation of physicians in Wyoming.

Outside of medicine, Dr. Wicks enjoys spending time with his wife, Laurie, and their three sons, Travis, Justin, and Brady. He also enjoys fly fishing, camping, golfing, skiing, and hunting.

Adrian Fluture

Interventional Cardiologist

Dr. Fluture is an interventional cardiologist who has been practicing since 2008, specializing in interventional and structural cardiology, vascular disease, and general cardiovascular care. He earned his medical degree from Victor Babeș University of Medicine and Pharmacy in Romania and completed his internal medicine residency at New York Medical College, followed by fellowships in cardiovascular disease and interventional cardiology through Tufts University School of Medicine.

Throughout his career in Wyoming, Dr. Fluture has played an important role in advancing cardiovascular care across the state. He introduced Transcatheter Aortic Valve Replacement (TAVR) and Left Atrial Appendage Occlusion (LAAO) procedures to Wyoming and helped expand treatment options for patients with structural heart disease. He has also served in several cardiovascular leadership roles, including Cath Lab Director and Director of Regional Myocardial Infarction and Cardiac Care.

Dr. Fluture is fluent in English, Romanian, German, French, and Spanish.

Outside of work he enjoys spending quality time with his family.

John Pickrell

Interventional Cardiologist

Dr. Pickrell is an interventional cardiologist with more than 30 years of experience in cardiovascular medicine. He completed his internal medicine internship and residency through Northwestern University Medical School, followed by a cardiology fellowship at the University of Minnesota.

Dr. Pickrell is board certified in Interventional Cardiology, Cardiovascular Disease, and Internal Medicine. In addition to his clinical practice, he spent 20 years as an Adjunct Clinical Faculty Member in Family Medicine and Cardiology with the University of Wyoming, helping educate and train physicians serving communities throughout the state.

Gary Idelchik

Interventional Cardiologist

Dr. Idelchik is an interventional cardiologist who has been practicing since 2009, specializing in cardiovascular disease, interventional cardiology, and advanced cardiac imaging. He earned his medical degree from the University of Texas Southwestern Medical School and completed his internal medicine training at the University of Michigan. He went on to complete fellowships in cardiology and interventional cardiology at the Texas Heart Institute at Baylor St. Luke’s Medical Center.

Dr. Idelchik is board certified in Interventional Cardiology, Cardiovascular Disease, Internal Medicine, and Nuclear Cardiology. His advanced training also includes peripheral vascular interventions, echocardiography, nuclear imaging, and cardiac CT angiography.

Throughout his career, Dr. Idelchik has been recognized for both clinical excellence and compassionate patient care. He is a Fellow of the American College of Cardiology and has been caring for patients in Wyoming since 2021.

Helen Bell

Acute Care Nurse Practitioner

Helen Bell grew up in Maryland, as a daughter of Ukrainian immigrants she developed an early appreciation for hard work, resilience and the learned the importance of community. She earned her master's degree from the University of Pittsburg and is a board certified Acute Care Nurse Practitioner. Her professional philosophy is centered on empowering patients to take an active role in their health along and well-being while using the tools and advancements of modern medicine to help them reach their health goals. Outside of her professional life she most enjoys trekking through nature and exploring our beautiful earth and all of its wonders.

Velvet Hiser

Family Nurse Practitioner

Velvet Hiser is a family nurse practitioner at WyoHeart with more than 30 years of healthcare experience. Throughout her career, she has worked as a critical care registered nurse, practiced in a successful family medicine setting, taught at Casper College, and served as a cardiology nurse practitioner at WyoHeart.

She holds a Master of Science in Nursing from South Dakota State University and is a certified Family Nurse Practitioner through the American Academy of Nurse Practitioners. Velvet and her family own a ranch in Bessemer Bend Valley outside Casper, Wyoming, where they raise registered Black Angus Cattle, hay, and Arabian and Half-Arabian horses.

In her spare time, Velvet enjoys horseback riding, traveling, and reading.

Arianne Staffileno

Family Nurse Practitioner

Arianne Staffileno is a family nurse practitioner at WyoHeart with more than 33 years of healthcare experience.

She graduated from the University of Wyoming as a registered nurse in 1993 then worked as a medical/surgical and telemetry nurse until graduating with her Master of Science degree as a family nurse practitioner from the University of Wyoming in 2004.

She has practiced at WyoHeart as a nurse practitioner since September of 2004.

Ari was born and raised in Casper and raised her four sons here.

In her free time, Ari enjoys running, biking, hiking, fishing, reading and following her children around the state and region for sports competition.

Nutiraporn Hanson

Cardiology Nurse Practitioner

Natt Hanson is a cardiology nurse practitioner, wife, mom, grandma, cancer survivor, traveler, and lifelong learner. Her nursing journey began in 2016, growing from LPN to RN and ultimately to an NP in a field she truly loves. Her experiences in healthcare and through cancer have taught her the importance of resilience, gratitude, family, and living life to the fullest. She is passionate about caring for others, continuing to learn, exploring new cultures, creating meaningful memories, and sharing a little heart, healing, and inspiration along the way.

Kelly Sumner

Family Nurse Practitioner

Dr. Kelly Sumner is a board-certified Family Nurse Practitioner with a Doctor of Nursing Practice degree from the University of Mary and a concentration in Bioethics. Her nursing background includes critical care, travel nursing, and clinical education, with experience caring for complex and critically ill patients and educating nurses in areas such as ECG interpretation and ECMO.

She currently specializes in cardiology, providing comprehensive care for patients with heart failure, chest pain, palpitations, dyspnea, and other cardiovascular conditions. Her clinical practice includes diagnostic evaluation, cardiac testing, and ongoing management of cardiovascular disease.

Outside of medicine, Kelly is a wife, mom, and grandma who values time with her family. She enjoys traveling, kayaking, spending time outdoors, home projects, and making memories with the people she loves.