Current Categorical Fellows

Manasa Gurumoorthi, MD

Training Dates: 7/07/2025 - 7/06/2028

Manasa completed her undergraduate degree in Molecular and Cell Biology at UC Berkeley and then received her MD at Case Western Reserve University School of Medicine. She completed her pediatrics residency at Duke, and was awarded an NIH-funded R38 grant during residency to pursue work studying the genetic underpinnings of arrhythmogenic cardiomyopathy. Her academic interests include cardiomyopathy and channelopathy genetics, precision medicine, and gene therapies, and she hopes to pursue this work across diverse patient populations. Outside of medicine, she enjoys reading fantasy with a cup of chai, playing tennis (at an absolute beginner level) with her husband, and exploring new restaurants.

Jessica Laird-Gion, MD

Training Dates: 7/07/2025 - 7/06/2028

Jessica grew up in Connecticut and completed her undergraduate degree in History at Brown University, graduating magna cum laude with honors and election to Phi Beta Kappa. She earned her medical degree from Harvard Medical School, where she developed virtual patient workshops to support patients with POTS (Heart Rhythm 2022) and was awarded the Dr. Bemy Jelin Prize for academic excellence in pediatrics. She completed her pediatrics residency and served as ChiefR in the Boston Combined Residency Program at Boston Children’s Hospital and Boston Medical Center. Her research in residency focused on ectopic atrial tachycardia in post-operative cardiac surgery patients (J Cardiovasc Electrophysiol 2025), BMI trajectory in children with Kawasaki Disease, and differences in MIS-C between COVID-19 waves (Eur J Pediatr 2023). Outside of medicine, Jessica enjoys reading, hiking, cycling, and traveling.

Whitney Lloyd, MD

Training Dates: 7/07/2025 - 7/06/2028

Whitney completed her undergraduate degree at University of St. Thomas playing on the volleyball team and majoring in biochemistry. She completed her medical school training at University of Minnesota and pediatrics residency here at Stanford. She has worked with Dr. Rajesh Punn investigating atrial mechanics and strain with ventricular septal defect repair. She has an interest in improving health outcomes and providing timely subspecialty care for Indigenous and underserved peoples. In her free time, she enjoys being outside especially on the water, playing volleyball, and spending time with family and friends.

Kristen Shea (Dammeyer), MD

Training Dates: 7/07/2025 - 7/06/2028

Kristen was born and raised in the small town of St. Marys, Ohio. She graduated summa cum laude with honors in chemistry from The Ohio State University before earning her MD at NYU Grossman School of Medicine, where she was elected to AOA. She completed her pediatrics residency at Stanford, where her research has focused on arrhythmias following pediatric heart transplantation and association with adverse outcomes. She also led a clinical informatics initiative to improve inpatient provider communication. Outside of medicine, Kristen served as captain of the Ohio State waterski team and now enjoys trail running, biking, skiing, brewing coffee in all forms, and making pizza.

Sam Tsai MD

Training Dates: 7/07/2025- 7/06/2028

Sam grew up in the suburbs of Seattle in Bellevue, WA. He is driven in his pediatric cardiology career by his family’s experience with congenital heart disease. He graduated college at UC Berkeley with highest distinction. He attended medical school at Dartmouth where he was inducted into AOA and completed his pediatrics residency at Seattle Children’s Hospital and University of Washington. He looks forward to caring for patients with Tetralogy of Fallot and promoting resilience in his patients. In his personal time, Sam enjoys playing tennis, snowboarding, hiking, playing piano, and sipping oolong tea.

Ben Zellmer, MD

Training Dates: 7/07/2025 - 7/06/2028

Ben completed his undergraduate studies in Biomedical Sciences at Marquette University, where he received the university’s highest honor for student leadership and was elected by his peers to serve as the student commencement speaker. He earned his medical degree from the University of Wisconsin–Madison, where he conducted qualitative research with Dr. Michelle Kelly focused on improving inpatient family–physician communication. He completed his pediatric residency at Lurie Children’s Hospital in Chicago, Illinois. During residency, he worked in the echocardiography lab with Dr. Pei-Ni Jone, studying long-term cardiac function in patients with Multisystem Inflammatory Syndrome in Children (MIS-C) and COVID-19 vaccine-associated myocarditis. His research was accepted for presentation at the American Society of Echocardiography’s 2024 annual meeting. Outside of medicine, Ben enjoys spending time with his wife and their Australian Cattle Dog, whom they rescued in 2020. He also enjoys exploring local restaurants and community events, playing trivia, and staying active through hiking, biking, and running.

Traci Barnes MD

Training Dates: 7/07/2024 - 7/06/2027

Traci, a native of California's Central Valley, completed her undergraduate degree in Biochemistry and Molecular Biology at UC Davis and was inducted into the Phi Beta Kappa Society. During her undergraduate studies, she served as the president of a student-run clinic and was published in Frontiers for research on glioblastomas. She continued her medical education at the Frank H. Netter MD School of Medicine at Quinnipiac University. She was inducted into the Gold Humanism Honor Society and presented research on trauma associated with alcohol use at the International Conference on Emergency Medicine in Seoul, Korea. She completed her pediatric residency at UCSF, where she worked on a project assessing the effect of tidal volumes on outcomes for neonates post-cardiac surgery. At her recent graduation, she received the Tim Kelly Resident Teaching Award, which is awarded to the resident who demonstrates excellence in teaching medical students. In her spare time, Traci enjoys playing soccer, hiking, gardening, and spending quality time with her husband and their dog.

Tomas Conrads Araya, MD

Training Dates: 8/01/2024 - 7/31/2028

Tomas was born in Santiago, Chile. He did his medical training in Universidad de Chile and worked as a faculty member over 2 years in the adults ICU. With his best friend, they founded a project who serves in one of the poorest areas of Santiago (rebuilding houses, afterschool activities to keep the kids out of the street, etc) and it is still functioning until today. Tomas' biggest interest in research is cardiovascular physiology, specifically founding innovative techniques to interrogate the heart to improve the outcome of cardiac interventions. For the past two years, he has been working in a novel technique for optimization of cardiac resynchronization therapy using pressure volume loops which was presented in the Heart Rhythm Society 2023 and WCPCCS 2023. He has also been also working profiling patient with heterotaxy and pulmonary hypertension. Tomas is looking to pursue a career in interventional cardiology, to find novel interventions to improve CCHD outcomes. In his free time he loves to go outdoor hiking and playing tennis with his wife and 2 kids.

Brian Dang, MD

Training Dates: 7/07/2024 - 7/06/2027

Brian Dang was born and raised in Diamond Bar, California. He completed his undergraduate studies at UCLA, with a major in marine biology. He was inspired to go into medicine after volunteering at Camp Ronald McDonald for Good Times, a camp for pediatric cancer patients and their siblings, and working with Dr. Theodore Moore, a pediatric oncologist who Brian still considers to be his most influential mentor. He then went to UCLA for medical school and UCSF for his pediatric residency. His academic interests include global health, 3D printing, and augmented reality. His personal interests include SCUBA diving, traveling, anything related to marine biology, and tropical fruits.

William Ealick, MD

Training Dates: 7/07/2024 - 7/06/2027

William was born and raised in Augusta, Georgia. He obtained his undergraduate degree in chemical and biomolecular engineering from the Georgia Institute of Technology before earning his MPH from Augusta University while serving as a high school teacher for Advance Physics. He earned his MD at the Medical College of Georgia at Augusta University, where he was elected to AOA. He completed his residency in pediatrics at the Boston Combine Residency Program. In his free time, he enjoys hiking, backpacking, fishing, cooking and, has recently developed an interest in wood-turning.

Priyanka Hardikar, MD

Training Dates: 7/07/2024 - 7/06/2027

Priyanka completed her undergraduate degree in Bioengineering at UCLA followed by a master's degree in Biomedical Engineering at Yale and then medical school at New York Medical College. She joins us after completing her pediatric residency at Children's National Hospital in DC. During residency she researched and published work investigating axial mechanical support devices implanted in a novel convergent cavopulmonary connection Fontan. She was later awarded a one-year, NIH funded R38 grant to pursue work identifying intracardiac flow parameters in patients with Tetralogy of Fallot; her R38 work has since been presented at national and international Cardiology conferences. Outside of clinical medicine she is passionate about medical education and global health, and she received a Medical Student Education Recognition award during residency. In her free time she enjoys cooking, being active and going on outdoor adventures, discovering comedy podcasts and shows, and exploring new places to eat and drink with her husband and dog.

Christina Stevens, MD

Training Dates: 7/07/2024- 7/06/2027

Christina is originally from Northern California, and completed her undergraduate degree at UC Berkeley. She then earned her MD at the University of Colorado where she was elected AOA and studied outcomes in adult Fontan patients. She completed her residency at Boston Children’s Hospital, where she worked on identifying predictors of mortality for patients with congenital heart disease who are supported by ECMO. Christina is an avid runner, hiker, and cyclist, and also enjoys gardening and playing piano.

Christopher Arakawa, MD, PhD

Training Dates: 7/07/2023 - 7/06/2027

Christopher is on the accelerated research pathway here at Stanford after earning his MD/PhD in Bioengineering from the University of Washington. There he synthesized light/enzyme responsive biomaterials and developed 3D cell printing methods to control stem cell fate and build 3D vascularized tissues (and created the world's first human in vitro capillaries), and was funded by 1 internal and 2 NIH grants (T32, F30) one of which he was PI. After completing his PhD, he was awarded a Japan Society for the Promotion of Science Postdoctoral Fellowship and worked as a researcher at the National Institute for Materials Science in Tsukuba, Japan where he led a team of students to develop thermo-responsive materials to direct stem cell differentiation. He has an interest in Dr. Mark Skylar-Scott's work on 3D printing of cardiac tissues and targeted drug screening to treat cardiomyopathies with Dr. Mark Mercola.

Mahmud Elfituri, MD

Training Dates: 7/07/2023 - 07/06/2026

Born in Sweden and raised in Tripoli, Libya, Mahmud obtained his MBBCH/MD from Tripoli University's Faculty of Medicine, followed by extensive pediatric residency training spanning Libya, Qatar (where he served as Chief Resident), and Queens, New York, at the Icahn School of Medicine at Mount Sinai. Mahmud's career has taken him across the globe, working in various healthcare settings, from developing countries and refugee care to advanced healthcare systems and underserved communities in Queens, New York, and Stanford. His research prowess was recognized with the AAP CHANGE grant, which he utilized to investigate post-surgical health disparities in children with congenital heart disease, resulting in a publication in JACC (Journal of the American College of Cardiology). His exceptional skills were acknowledged by renowned physician Robert Pass, who considers Mahmud one of the finest residents he has ever worked with. Beyond medicine, Mahmud enjoys life as a devoted father of three and has previously excelled as a windsurfing vice champion in Libya. Today, he finds solace in Bay Area biking and relaxation at Stanford's swimming pool. Mahmud's passion lies in Interventional Cardiology, and he is committed to making a positive difference in the lives of his patients, one step at a time.

Jerin Jose, MD

Training Date: 7/07/2023 - 07/06/2026

We have been lucky to have Jerin as a hospitalist in our CVICU for the past 2 years. Prior to that, she completed her residency at UCLA and medical school at UT Southwestern. She has researched the intersection between Kawasaki Disease and Covid-19 infection with our own Seda Tierney, and presented this research at 2 national (and international!) meetings and as many of you recall, won an award for best abstract at our Heart Center Research Day this fall. Outside of work, she enjoys yoga, cooking and growing her balcony garden.

Justin Kochanski, MD

Training Dates: 7/07/2023 - 7/06/2026

Justin was one of our own Stanford Pediatric residents, after having graduated from Drake University with a degree in Biochemistry and then earning his MD from Creighton. His current work with Greg Adamson and Jeff Feinstein reviews the use of Remodulin in pediatric patients with pulmonary arterial hypertension and factors associated with positive long-term clinic response (which he presented as an oral abstract at our Heart Center Research Day this fall). He has also published a case report describing a unique prenatal diagnosis of scimitar syndrome variant (2019), which received an award at the Phoenix Fetal Cardiology Symposium. He is passionate about medical education and was nominated to the LPCH Clinical Teaching Honor Roll all three years of his residency. At his recent graduation he was honored with the Caroline Graham Lamberts Gratitude and Service Award, which is given to a graduating resident who practices humanistic care and demonstrates compassion within the field of Pediatrics. His personal interests include surfing, travel, playing & watching soccer, and spending time with his dog Shiloh.

Jesse Ortega, MD

Training Dates: 7/07/2023 - 7/06/2026

Jesse is joining us from Texas Children's after having graduated from UT Austin with a major in nutritional sciences, and UT Southwestern for his MD. He is working on a number of projects including evaluating digoxin in the interstage period for single ventricle patients, time to intervention in patients with STEMIs, designing a continuing education course on basic sonography knowledge for EMS providers and investigating the impact of open bed NICU environments vs private rooms on parent-staff communication and satisfaction. He has been managing his family's landscaping business for the past 14 years, is involved in a number of community programs focused on supporting socio-economically disadvantaged students to have access to a career in medicine, and speaks Spanish fluently. He runs half and full marathons in his free time, and played soccer at UT Austin. And on his phone call with me today, said that it was past time for a change out of Texas and he could not be more thrilled to join us here in the Bay Area for the next several years.

Nina Zook, MD

Training Dates: 7/07/2023 - 7/06/2026

Nina completed pediatric residency here at Stanford and is currently a CVICU hospitalist after earning her undergraduate degree at Emory, and MD from Creighton. She has a number of publications including identifying an appropriate endpoint for cryoablation in children with AVNRT (Heart Rhythm 2022), submitted her work on oral aversion and nutrition in pediatric heart transplant patients (Journal of Heart and Lung Transplantation 2022) after presenting at ISHLT, and partnered with several of our colleagues on the impact of a clinical pathway on AKI in patients undergoing heart transplant (Pediatric Transplantation 2022). She was awarded the Excellence in Scholarship Award for Clinical Research during her last year of residency, has served as a medical volunteer at Camp Taylor for the last 2 years, and a mentor for undergraduate Stanford students interested in medicine (via the Stanford Immersion in Medicine group). She is an All-American NCAA swimming and diving champion in college for which she received a NCAA postgraduate scholarship and now mentors student athletes at Stanford interested in pursuing a career in healthcare.

Pediatric Cardiology

Current Categorical Fellows

Manasa Gurumoorthi, MD

Training Dates: 7/07/2025 - 7/06/2028

Jessica Laird-Gion, MD

Training Dates: 7/07/2025 - 7/06/2028

Whitney Lloyd, MD

Training Dates: 7/07/2025 - 7/06/2028

Kristen Shea (Dammeyer), MD

Training Dates: 7/07/2025 - 7/06/2028

Sam Tsai MD

Training Dates: 7/07/2025- 7/06/2028

Ben Zellmer, MD

Training Dates: 7/07/2025 - 7/06/2028