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Vascular Technologists


Patti Abedi – RVT

Patti began her career as a Vascular Technologist in 1986 at the St Joseph Medical Center. She joined Vascular Surgery Associates in 2000 and was named the Technical Director of the Vascular Labs in 2003. Experienced in all vascular diagnostic exams, and is currently working in the Towson location on the campus of University of Maryland, St Joseph Medical Center.


Stephanie Yakas – RVT

Stephanie transitioned from being an RN to becoming a Registered Vascular Technologist and Registered Diagnostic Sonographer in 2002-2003. She worked at University of MD hospital’s vascular lab in 2003 then at Sinai Hospital’s vascular lab from 11/2003 to 8/2005 and has been with VSA ever since.



Jennifer Jones – RVT

Mrs. Jones has over 15 years of clinical experience in medical imaging including fixed and mobile radiography, CT’s and General Ultrasound.


Shannon Surface – RVT

Shannon graduated from UMBC Diagnostic Medical Sonography Program specializing in Vascular in 2010. She has worked in both private practice and in a hospital vascular lab. She is currently taking classes to complete a Masters in Acupuncture.


Wendy Shearer, RVT

Wendy graduated from UMBC’s Diagnostic Medical Sonographer program and joined VSA in 2015.


Jennifer Bonaventure, RVT

Jennifer graduated from UMBC Diagnostic Medical Sonography program in 2009. She has 10 years of hospital experience as a vascular sonographer. She joined vascular surgery associates in 2019.


Kerri Davis, RVT

Kerri graduated from UMBC Diagnostic Medical Sonography in 2009. She joined VSA directly from graduating school and has over 10 years of vascular ultrasound experience.



Rachel Butrim, RVT

Rachel joined Vascular Surgery Associates in 2017. She graduated from UMBC in 2013. She previously worked at University of Maryland Medical Center and is experienced in non-invasive vascular diagnosis exams.


Kristen McHugh, RVT

After witnessing the effects of vascular disease and the prominence in the community around her, Kristen took an interest in the diagnostic procedures used to help treat these patients. She transitioned from the field of pharmacy into sonography. She graduated from UMBC’s Vascular Sonographer program in 2013. She has several years of experience in both inpatient and outpatient vascular testing/procedures and clinical precepting. She joined VSA in 2019.


Michelle Keener vascular technologist

Michelle Keener, RVT

Michelle joined Vascular Surgery Associates in February 2021. She completed the Diagnostic Medical Sonography program at UMBC with a certification in Vascular Sonography. She offers multiple years of experience in non-invasive diagnostic imaging and assisting physicians with Endovenous closure procedures.


Bobby Chacko vascular technologist

Bobby Chacko, RVT

Bobby graduated in 2007 from the Vascular Technology Program at The University of Medicine & Dentistry of New Jersey. His work experience encompasses diagnostic vascular imaging in both outpatient private practice and inpatient hospital settings throughout Maryland, Delaware and New Jersey.


Marion Bauer vascular technologist

Marion Bauer, RVT

Marion graduated from UMBC's Diagnostic Medical Sonography program in 2017. She began her career in a small community hospital's Cardiovascular lab. She was able to experience both inpatient and outpatient settings during her time there. She joined VSA in November 2021 and enjoys growing with the practice.


Sarah Hill vascular technologist

Sarah Hill, RVT

After graduating from UMBC Sonography Program in 2016, Sarah worked at Upper Chesapeake Medical Center as well as PRN at Good Samaritan Hospital performing non- invasive diagnostic vascular imaging and assisting in procedures such as Ellipysis and ultrasound-guided thrombin injections. She joined VSA in July 2020, where she has added to her skill set by becoming proficient in assisting our physicians with the multiple types of Endovascular venous closures.


Sofia Samra vascular technologist

Sofia Samra, RVT

Sofia graduated from the UMBC Diagnostic Medical Sonography program in 2020. She worked at the University of Maryland Medical Center Downtown and Upper Chesapeake before joining Vascular Surgery Associates in 2023.


Melissa Zlatos vascular technologist

Melissa Zlatos, RVT

Melissa graduated from the Johns Hopkins School of Medical Imaging, Diagnostic Medical Sonography program in 2014 with an academic achievement award. For many years, she served as a clinical instructor for sonography students and was presented an award for her dedicated contribution to student education. She has spoken at the annual vascular society of ultrasound conference presenting a rare pediatric case study and holds multiple registries to include general ultrasound, OB-GYN ultrasound as well as vascular ultrasound. Melissa proudly joined the VSA team in 2021 taking pride in giving quality care to our patients.


Merritt Card vascular technologist

Merritt Card, RVT

Merritt obtained his bachelor’s degree from Liberty University in Lynchburg Virginia in 2018, and completed his associate degree in Diagnostic Medical Sonography shortly thereafter at East Coast Polytechnic Institute. Prior to joining VSA, Merritt worked as a Vascular Sonographer at Wake Forest Baptist in North Carolina, and also served for six years in the Army National Guard. He is experienced in both inpatient and outpatient vascular testing and procedures.


Ashley Herold vascular technologist

Ashley Herold, RVT

Ashley graduated from UMBC's Vascular Sonography program in 2019. She joined Vascular Surgery Associates in 2021 and offers several years of experience in diagnostic vascular imagining, endovenous closures, and patient care.


RAD Technicians

Michele Hart, RT

Ms. Hart recently joined Vascular Surgery Associates after an extensive experience at University of Maryland St. Joseph Medical Center. Ms. Hart assists the surgeon in the operating room with radiological imaging.


Krystal Schultz, RT

Ms. Schultz joined Vascular Surgery Associates in 2017. She has over 10 years experience in interventional procedures. Ms. Schultz assists the surgeon in the operating room with radiological imaging. Ms. Schultz also directs the administrative and operations of the imaging division.


Jenn Beam, RT

Ms. Beam joined Vascular Surgery Associates in 2018. She has 12 years of experience in interventional cardiovascular procedures. Last 10 years as the Lead Cardiovascular specialist in the Heart and Vascular Institute Licensed as a radiologic technologist with certifications in Cardiac Intervention…RT(R)(CI)

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