Advanced Practice Professionals


These are the Physician Assistants (PAs) and Certified Registered Nurse Practitioners (CRNPs) of AMS Cardiology.

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Colleen Suter, CRNP

Colleen has been a nurse practitioner since 2001. She attended the University of Pennsylvania, earning her BSN in 1997 and MSN in 2001. She is certified as an Acute Care Nurse Practitioner. She has worked at Abington Medical Specialists since 2004. Prior to then, she was a nurse practitioner at the Hospital of the University of Pennsylvania, working in the inpatient setting for the Heart Failure/Transplant program. Before becoming a nurse practitioner, Collen was a nurse in the cardiac intermediate care unit at Penn. Is also a member of the American Association of Heart Failure Nurses.

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Heather Walters, CRNP

Heather joined AMS Cardiology in 2019. She attended Neumann University and earned her Master’s in Adult Gerontology/Primary care in May 2017. She earned her Bachelor’s in Nursing from Immaculata University. Prior to joining AMS Cardiology, she briefly worked at Doylestown Cardiology in their device clinic. Before attaining her Nurse Practitioner certification, she worked at Abington Memorial Hospital in the Cardiac/Neuro and Electrophysiology lab for over eleven years. There, she was awarded a monetary patient safety award and was nominated for the Sarah Houck award and other nursing excellence awards. She has been involved in Cardiac research, which includes the first absorbable stent trial and first MRI compatible pacemaker trials. She is a member of the American Association of Nurse Practitioners and PA Association of Nurse Practitioners.

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Sarah Weckerly, PA-C

Sarah has been a NCCPA certified Physician Assistant since 2009. She attended Thomas Jefferson University where she earned her bachelor’s degree in Diagnostic Imaging in 2002. She went on to work in the Cardiac Catheterization/EP lab at Doylestown Hospital from 2002-2007. She then attended DeSales University where she earned her Master of Science in Physician Assistant Studies in 2009. She spent the beginning of her PA career working in Emergency Medicine at both Abington Hospital Jefferson Health and Jefferson Lansdale. She joined AMS Cardiology in summer 2022. Sarah is a member of the American Academy of Physician Assistants.

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Rhiannon Whyte, CRNP

Rhiannon Whyte, CRNP joined AMS Cardiology in October 2021.  She completed her undergraduate education at Grand Canyon University and received her Master's degree from Widener University in 2021.  Prior to coming to AMS, Rhiannon spent 6 years as a Registered Nurse.  She has experience in general medicine, emergency medicine, and has spent the last 3 years at Abington Jefferson Hospital's cardiac intensive care unit.  Rhiannon uses her well-rounded medical experience to provide a full-picture approach to patient care.

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Seamus Winters, PA-C

Seamus joined AMS Cardiology in November 2021. He attended Lock Haven University of Pennsylvania where he earned his Bachelor of Science in 2017 and Master of Health Science in 2019. Before joining AMS, Seamus worked as a PA in Cardiology in West Chester, PA for 2+ years. Seamus is also a member of the American Academy of Physician Assistants.