Cardiac Imaging and Diagnostics at Covenant Health

Comprehensive heart testing for accurate diagnosis and care.

female doctor conducts ultrasound of male patient's heart

What Is Cardiac Imaging?

Cardiac imaging, also known as heart diagnostic imaging, encompasses a variety of non-invasive and minimally invasive tests designed to evaluate heart health. These tests help detect heart disease, assess risk factors, and guide treatment decisions by providing detailed insights into your heart’s structure, function, and blood flow.

Covenant Health offers a comprehensive range of cardiac imaging services, performed by expert specialists using state-of-the-art technology. Whether you need a routine screening or a diagnostic test for a specific condition, our team is here to support your heart health journey.

young male runs on treadmill with heart monitors
A doctor provides a heart consultation with elderly woman who has her hands over her heart.

When Should You Schedule Cardiac Imaging?

Cardiac imaging tests can provide important insights into your heart’s health. You may need to schedule cardiac imaging if you’re experiencing symptoms like:

  • Chest pain
  • Shortness of breath
  • Irregular heartbeats
  • Unexplained fatigue

Your doctor might also recommend imaging if you have risk factors such as a family history of heart disease, high blood pressure, or high cholesterol. If you’ve recently had heart surgery or a cardiac procedure, imaging may be part of your follow-up care.

Cardiac Imaging and Diagnostic Procedures

At Covenant Health, our advanced cardiac imaging and diagnostic procedures help detect heart conditions with accuracy and precision. Using state-of-the-art technology, our specialists evaluate heart function and blood flow to guide personalized treatment plans, ensuring the best possible care for your heart health.

Non-Invasive Cardiac Imaging

Non-invasive cardiac imaging uses advanced technology to create detailed pictures of the heart and blood vessels without the need for surgery or catheterization. Examples include:

  • Echocardiogram: Uses sound waves to produce real-time images of the heart’s structure and function.
  • Cardiac Computed Tomography (CT): A specialized X-ray that provides detailed cross-sectional images of the heart and coronary arteries.
  • Cardiac MRI: Uses magnetic fields and radio waves to produce precise images of the heart’s anatomy and function.
  • Coronary Calcium Scan: A CT scan that detects calcium buildup in the coronary arteries to assess heart disease risk.
  • Electrocardiogram (EKG/ECG): a non-invasive test that records the heart’s electrical activity. Visit our Electrophysiology page for more information on EP testing.
View more Electrophysiology tests

Nuclear Imaging and Stress Tests

Nuclear imaging and stress tests use small amounts of radioactive material and specialized imaging to evaluate blood flow, heart function, and areas of damage or stress in the heart. Examples include:

  • Nuclear Stress Test: Measures blood flow to the heart during rest and exercise using a radioactive tracer.
  • Nuclear Treadmill Test: Combines exercise on a treadmill with nuclear imaging to assess blood flow and identify areas of reduced circulation.
  • Single-Photon Emission Computed Tomography (SPECT): Produces 3D images of the heart to evaluate blood flow and detect heart conditions.
  • Thallium Cardiac Viability Imaging: Uses a radioactive tracer to assess heart muscle viability and detect damaged tissue.
  • Multigated Acquisition (MUGA) Scan: Evaluates the heart’s pumping efficiency by tracking a radioactive tracer in the blood.

Vascular Ultrasound and Diagnostic Tests

Vascular ultrasound and diagnostic tests are non-invasive procedures that use sound waves or pressure measurements to evaluate blood flow, blockages, or circulation in arteries and veins. Examples include:

  • Arterial/Venous Ultrasound: Uses ultrasound to assess blood flow and detect clots, blockages, or abnormalities in veins and arteries.
  • Duplex Arterial/Venous Doppler Ultrasound: Combines traditional ultrasound with Doppler technology to measure the speed and direction of blood flow in vessels.
  • Ankle Brachial Index (ABI): Compares blood pressure in the ankle and arm to diagnose peripheral artery disease (PAD) and circulation issues.

Invasive and Specialized Diagnostic Procedures

Invasive and specialized diagnostic procedures involve inserting devices or instruments into the body to provide detailed information about heart function, blood flow, or rhythm disorders. Examples include:

  • Coronary Angiogram: A catheter-based procedure that uses X-rays and contrast dye to visualize blockages in the coronary arteries.
  • Implantable Loop Recorder: A small device implanted under the skin to monitor and record abnormal heart rhythms over an extended period.

Our Cardiac Imaging and Diagnostics Locations

Cardiac imaging and diagnostic procedures require a physician order. Covenant Health offers cardiac imaging and diagnostic services at multiple locations in Knoxville and across East Tennessee, allowing us to provide more heart in more places, and ensure expert care is never far away.  Call our Customer Care Center at 865-374-0411 to learn more about scheduling a procedure near you.

Our Cardiac Imaging Specialists

Covenant Health’s cardiology team includes highly skilled imaging specialists with advanced training in diagnostic procedures. We are committed to providing accurate results and compassionate care. Connect with one of our experts today.

Find a Cardiologist
A Covenant Health cardiologist discusses options with a patient in a physician's office.

Preparing for Your Cardiac Imaging Appointment


1. Before Your Test

Follow any fasting or medication guidelines from your doctor, and avoid caffeine if instructed, especially for tests like a nuclear stress test.

2. What to Bring

Please bring a list of your current medications, any required referrals, and previous test results if available.

3. During the Test

Most imaging procedures are painless and typically take 30 to 60 minutes. Our team will guide you through the process and answer any questions.

4. After the Test

Your doctor will review the results with you and discuss the next steps in your care plan.

Explore Our Cardiology Services

Our network of nine hospitals and 25 cardiology practice locations is committed to exceptional care and offers the latest advancements in cardiology services. Explore more Covenant Health cardiology services below.

Frequently Asked Questions

We are committed to patient education and transparency in our care. If you can’t find an answer to your question, please contact our Customer Care Center at 865-374-0411.

Do I need a referral for cardiac imaging?

A referral may be required, depending on your insurance and the type of test. We recommend checking with your doctor or contacting our scheduling team for guidance.

Call 865-374-0411

What is the difference between a nuclear stress test and a regular stress test?

A regular stress test monitors your heart while you exercise on a treadmill or stationary bike, while a nuclear stress test includes imaging with a small amount of radioactive tracer to assess blood flow to your heart.

How much does cardiac imaging cost?

Costs vary based on the type of test and your insurance coverage. Our team can provide estimates and assist with insurance verification to help you understand your financial responsibility. Contact us for details about self-pay options or insurance coverage. 

Call 865-374-0411

Are cardiac imaging tests painful?

Most cardiac imaging tests are non-invasive and painless. Some tests, like nuclear imaging or stress tests, may involve mild discomfort from an IV or exercise.

How long does a heart imaging appointment last?

The length of your appointment depends on the type of test, but most procedures take between 30 minutes and an hour. Some advanced imaging tests may take longer.

When will I know the results of my cardiac imaging?

Your doctor will review the results and discuss them with you, typically within a few days. If urgent findings are detected, we will notify you as soon as possible.

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