Advanced Heart Rhythm Care Comes to Mountain Home as Baxter Health Establishes a
Dedicated Electrophysiology Program
MOUNTAIN HOME, Ark. —Baxter Health is proud to welcome William Spencer Grigg, DO, MBA, to the
Baxter Health Cardiovascular Clinic. Dr. Grigg is an electrophysiologist, a physician who specializes
in diagnosing and treating abnormal heart rhythms, and his arrival marks the beginning of a dedicated
cardiac electrophysiology program for Mountain Home and the surrounding region. He joins an
experienced cardiovascular team that includes Timothy Bowen, MD, Michael Camp, MD, Akihiro
Kobayashi, MD, Jamon Pruitt, MD, Ernesto Ruiz-Rodriguez, MD, Patrick Tobbia, MD, Otis Warr IV,
MD, Denise Beeson, APRN, Leah Fountain, APRN, and Debra Wilhite, APRN. Grigg will begin seeing
patients in late August.
For a number of patients across the region, receiving electrophysiology care has meant a long drive.
Conditions like atrial fibrillation, which causes an irregular and often rapid heartbeat, or other
arrhythmias that affect how the heart beats, can significantly impact quality of life and, if left
unmanaged, can raise the risk of stroke or heart failure. Having a specialist with Grigg’s training and
experience in Mountain Home means that patients who once had to travel hours for this level of care
can now get it close to home.
Grigg completed his residency training in internal medicine and then went on to complete fellowship
training in general cardiology, both through UCHealth and the University of Colorado. In June 2026 he
completed an advanced fellowship in cardiac electrophysiology at the University of Rochester Medical
Center, one of the country’s leading academic health systems. That path reflects the dedication of a
physician who has spent years going deeper into one of cardiology’s most technically demanding
specialties.
In practice, that means Grigg is trained to perform catheter ablation procedures, a minimally invasive
technique used to correct abnormal electrical pathways in the heart that cause irregular rhythms. He
is also experienced in implanting pacemakers and defibrillators, devices that help the heart maintain a
safe and steady beat. For patients with atrial fibrillation who cannot tolerate blood thinners long-term,
he is trained in Watchman-type procedures, which can reduce stroke risk through an alternative
approach. He brings experience with the latest ablation technologies, including methods that are
more precise and often associated with faster recovery.
Grigg describes his approach to patient care simply: listen closely, explain things clearly, and treat
patients the way he would want his own family treated. He believes patients deserve to understand
their diagnosis and know their options, and he is committed to working alongside patients, their
families, and referring physicians to build treatment plans that make sense for real people living real
lives.
Originally from Hickory, North Carolina, Grigg and his family look forward to putting down roots in
Mountain Home. Outside of the clinic, he enjoys spending time with his wife and children,
volunteering, traveling, skiing, mountain biking, and hiking, which makes Mountain Home an ideal
landing place.
“This is a milestone for Baxter Health and for our region,” Ron Peterson, President and CEO of
Baxter Health, said. “Bringing a dedicated electrophysiology program to Mountain Home
means our patients no longer have to leave home to access this level of heart rhythm care.
Grigg is not just an exceptional physician, he is someone who chose to be here, who wants to
be part of this community. That matters to us, and it will certainly matter to our patients.”
Grigg will begin seeing patients in late August. Appointments are available now through the Baxter
Health Cardiovascular Clinic. To schedule, please call (870) 425-8288.
