Rachel A. Hart, DO

Rachel
A
Hart
DO
Assistant Professor of Clinical Pediatrics, Genetics
Medical Center North
Room / Suite
DD-2205
Nashville
Tennessee
rachel.hart@vumc.org

D.O.
Kansas City University, Kansas City, MO

Residency
Internal Medicine-Pediatrics - East Carolina University, Greenville, NC

Fellowship
Medical and Molecular Genetics - Indiana University, Indianapolis, IN

Website for Patients
https://www.childrenshospitalvanderbilt.org/doctors/hart-rachel

LeAnna Kehl, PhD

LeAnna
Kehl
PhD
Licensed Psychologist
Assistant Professor of Pediatrics
Departments of Developmental Medicine and Pediatric Psychology
Doctors' Office Tower
2200 Children's Way
Room / Suite
11101
Nashville
Tennessee
37232-9003
leanna.kehl@vumc.org

MS
Clinical Child and School Psychology - Southern Illinois University-Edwardsville, Edwardsville, IL

PhD
School Psychology - University of Florida, Gainesville, FL

Internship
Predoctoral Internship in Pediatric Psychology - Mailman Center for Child Development, University of Miami, Miami, FL

Fellowship
Postdoctoral Research Fellowship - Vanderbilt Kennedy Center Treatment and Research Institute for Autism
Spectrum Disorders (VKC TRIAD), Vanderbilt University Medical Center, Nashville, TN

Clinical Interests
Autism Spectrum Disorder, Neurodevelopmental Conditions, Developmental Delays, Caregiver Training and Coaching, Integrated Behavioral Health in Primary Care

Research Interests
Dr Kehl's research focuses on the development, implementation, and evaluation of evidence-based practices for autistic children and for children experiencing behavioral and emotional concerns. Past and current projects examine innovative assessment and intervention models, including telehealth diagnostic tools, caregiver focused interventions, and integrated behavioral health approaches within the pediatric primary care setting.

Twiza Mambwe, MD

Twiza
Mambwe
MD
Assistant Professor of Clinical Pediatrics, Critical Care Medicine
Doctors' Office Tower
2200 Children's Way
Room / Suite
5121
Nashville
Tennessee
37232
twiza.mambwe@vumc.org

M.D.
American University of Antigua College of Medicine

Residency 
Pediatrics - Northwell Health Staten Island University Hospital

Fellowship
Pediatric Critical Care - University of Texas Heath Science Center, San Antonio
Pediatric Cardiovascular ICU - University of Texas Health Science Center, Houston

Clinical Interests
Medical Education, Simulation Training, Nursing Education

Olga H. Toro-Salazar, MD, EMBA

Olga
H
Toro-Salazar
MD, EMBA
Professor of Pediatrics
Cardiology
Director
Dimensional Imaging
Director
Cardio-Oncology Program

Dr. Olga Toro-Salazar is a Pediatric Cardiologist and Professor of Pediatrics at Vanderbilt University Medical Center, where she directs the Cardio-Oncology and Dimensional Cardiac Imaging Programs at Monroe Carell Jr. Children’s Hospital. Her career has been dedicated to advancing cardiovascular care for children and young adults with congenital and acquired heart disease, with a particular focus on patients facing the combined challenges of cancer and cardiovascular disease. 

As an expert in advanced cardiac imaging, myocardial mechanics, and precision cardio-oncology, Dr. Toro-Salazar’s work emphasizes early detection of cardiotoxicity, survivorship care, and development of data-driven clinical models. Her vision for Vanderbilt includes building a national model for pediatric precision cardio-oncology supported by AI-enhanced risk prediction, cloud-based registries, standardized imaging protocols, and integrated biomarker and genomic

(615) 322-7447
Doctors' Office Tower
2200 Children's Way
Room / Suite
5230
Nashville
Tennessee
37232-9119

Dr. Toro-Salazar is actively expanding a comprehensive research program centered on precision cardio-oncology, advanced cardiac imaging, digital health interventions, and multicenter collaboration. 

Her primary project, “Improving Cardiovascular Outcomes of Pediatric, Adolescent, and Young Adult Cancer Survivors with Implementation of Precision Cardio-Oncology Care” integrates precision medicine and AI models into clinical practice. With IRB submission underway, the project includes development of a cloud-based registry for real-time patient monitoring and aims to leverage real-world data to improve cardiovascular outcomes in cancer survivors. 

Dr. Toro-Salazar is also leading a study evaluating the “Feasibility of a Personalized Home Exercise Trial Using a Mobile App to Improve Cardiorespiratory Fitness in Childhood Cancer Survivors”. Pilot work is complete, with an R34 grant planned for June 2026. 

Use of Integrated Statistical Modeling Using Early CMR-Derived Imaging Biomarkers of Adverse Remodeling to Improve Prediction and Prevention of Cardiotoxicity Progression and Mortality*, focuses on developing advanced predictive imaging models. An R34/R01 application is planned for October 2026. 

Dr. Toro-Salazar leads the Imaging in Cardiac Hematology Oncology Research (ICHOR) Consortium, a multicenter collaborative network that drives innovation in multimodality imaging for pediatric cancer patients. ICHOR-affiliated hospitals include Connecticut Children’s (lead), Nationwide Children’s Hospital, Le Bonheur Children’s Hospital, Vanderbilt Children’s Hospital, St. Jude Children’s Research Hospital, Cincinnati Children’s Hospital Medical Center, Duke Children’s Hospital & Health Center, Children’s National Hospital, and Ann & Robert H. Lurie Children’s Hospital of Chicago. Her 2026 goals include development of a shared registry through ImageCHD for standardized multicenter imaging data collection.

https://www.ncbi.nlm.nih.gov/myncbi/olga.toro-salazar.1/bibliography/pu…

olga.torosalazar@vumc.org

MD
Universidad Javeriana, Bogota, Columbia

Residency
Pediatrics - University of Connecticut, Farmington, Conn.

Fellowship
Pediatric Cardiology - University of Minnesota, Minneapolis
Cardiac MRI Fellowship - Boston Children's Hospital, Boston

Taylor Gassmann, DNP, FNP-BC

Taylor
Gassmann
DNP, FNP-BC
Nurse Practitioner
General Pediatrics
Vanderbilt Health One Hundred Oaks
719 Thompson Ln.
Room / Suite
30300
Nashville
Tennessee
taylor.m.gassmann.2@vumc.org

DNP
Vanderbilt University School of Nursing, Nashville

MSN
Family Specialty - Vanderbilt University School of Nursing, Nashville

Kelsey W. Brown, MD

Kelsey
W
Brown
MD
Assistant Professor of Pediatrics, Cardiology
Doctors' Office Tower
2200 Children's Way
Room / Suite
5230
Nashville
Tennessee
37232-9119
kelsey.brown@vumc.org

M.D.
University of Missouri-Kansas City

Residency
Pediatrics - Children's Hospital of the King's Daughters, Norfolk, Virginia

Fellowships
Pediatric Cardiology - Children's National Hospital, Washington, DC
Advanced Cardiac Imaging - Children's National Hospital, Washington, DC

Olivia Solverson, MS, CGC

Olivia
Solverson
MS, CGC
Genetic Counselor, Genetics
Medical Center North
Room / Suite
DD-2205
Nashville
Tennessee
37232-2579
olivia.solverson.1@vumc.org

Clinical Interests:
Pediatric and Adult Genetics
Neurodevelopmental Disorders
Rare Disease Diagnosis and Advocacy

Keely Clanton, MS, CGC

Keely
Clanton
MS, CGC
Genetic Counselor, Genetics
Medical Center North
Room / Suite
DD-2205
Nashville
Tennessee
37232-2579
keely.clanton@vumc.org