Our Office

Mon – Fri, 8:00 am – 5:00 pm
175 Mary Street
Boone, NC 28607

Contact Us

Phone: (828) 264-9664
Fax: (828) 264-8144

Our Providers

Learn about our team of providers
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Take care of your heart!

The Cardiology Center is committed to providing you with diagnosis and treatment of heart and vascular disease close to home. High Country residents no longer have to leave the mountains for cardiac care from the nation’s top medical professionals. It is located on the campus of Watauga Medical Center, allowing the center’s patients access to the services provided by the Medical Center. Our team is committed to promoting health in the High Country and simply making life better.

The Cardiology Center now offers same-day appointments for new and established patients who are experiencing cardiac symptoms. If you are experiencing chest pain, shortness of breath, or other life-threatening symptoms, call 911. If you are experiencing non-life-threatening cardiac symptoms, call (828) 264-9664 to schedule an appointment.

*Note: Cardiology services are available at Grandfather Specialty Clinic (Linville, NC). Call (828) 264-9664 to schedule an appointment.

Patients may contact Practice Manager Valeree Lentz at vlentz@apprhs.org or call (828) 264-9664 with questions, concerns, complaints or compliments regarding The Cardiology Center. 

Forms to complete before your appointment
Physician referral forms
Our Services

Afib Monitors

Arrhythmia Clinic

Cardiac Resynchronization

Cardiology Consultations

Cardiovascular Interventions


Diagnostic Catheterizations



Exercise Treadmill Tests

Heart Monitors

Implantable Monitors

Nuclear Stress Tests



Stress Echocardiograms

Show Your Heart Some Love: 3 ways to prevent heart disease

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4 Things You Should Know About Your Pacemaker

For those aspiring for better health, a lower resting heart rate is typically one of the most common goals. But what happens when your heart starts beating too slowly? Fatigue, lightheadedness, and confusion are all symptoms of a heart that’s working inefficiently and may be in need of a…

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5 Things You May Not Know about AFib

Atrial Fibrillation is a common condition where the heart beats irregularly and causes inefficient blood flow. Whether your doctor recently discussed your symptoms and diagnosis with you or you suspect you may have this arrhythmia, here are five things you may not be aware of when it comes to…

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Heart Failure

Heart failure is a condition in which your heart becomes too weak to pump blood as effectively as it should. It may come on suddenly, after a heart attack for example, or it may develop slowly as you age or in response to a variety of diseases and conditions, especially high blood pressure.

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Appalachian Regional Healthcare System introduced to the High Country the first electrophysiology program to provide leading edge, exceptional care for persons with cardiac arrhythmias and the need for pacemaker and defibrillator implantation and management.

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Dr. Denier is great….She’s an extremely good cardiologist. I highly recommend her. Also, her staff is wonderful. They actually call you back with test results, and they return phone calls. How many doctors’ offices do that today?

Brenda R.

As a former nurse, I am very selective about the physicians treating my family. Dr Hordes gained my respect by first walking into the room and extending his hand to shake with first my husband, the patient, and then myself. He gained my trust through his calm demeanor, pensive consideration of the issues, realistic treatment plan and attention to detail. I cannot recommend him highly enough and have the highest confidence in his ability.

Bunny E.

Outstanding ! Couldn’t be happier Dr. Helak is thorough and on the spot! Great physician!

Bette P.