Comprehensive Cardiology and Advanced Health Diagnostic Testing
From cardiovascular consultations to advanced imaging and diagnostic testing, Astra Healthcare provides coordinated care to help patients better understand and manage their heart health
- Phoenix & Tempe, AZ
Comprehensive Cardiovascular Care
Astra Healthcare provides clinical Cardiology evaluations supported by advanced cardiovascular testing within one coordinated practice.
Each patient’s symptoms, medical history, risk factors and previous results are carefully reviewed to determine the appropriate next steps in their care.
Coronary Calcium Scoring
Coronary Calcium Scoring is a noninvasive CT examination that measures calcified plaque within the coronary arteries.
The results are reported as an Agatston score, which helps physicians assess the patient’s risk of Coronary Artery Disease and make more informed prevention and treatment decisions.
- Measures calcified plaque in the coronary arteries
- Helps support cardiovascular risk assessment and preventive care
Advanced Coronary Analysis
When clinically appropriate, Coronary CT Angiogram images may be evaluated using specialized software such as Cleerly or HeartFlow.
These additional analyses can provide further information about plaque composition and the potential hemodynamic effect of coronary narrowing on blood flow. These services must be requested before the scan.
- Provides additional characterization of coronary plaque
- Helps evaluate how arterial narrowing may affect blood flow
Meet Dr. Samuel Unzek
Cardiologist and Advanced Cardiac Imaging Specialist
Samuel Unzek Freiman, MD, FACC, FASE, FASNC
Dr. Samuel Unzek is a cardiologist and Advanced Cardiac Imaging Specialist with more than 20 years of medical experience. He is board-certified in Cardiology, Internal Medicine and Nuclear Cardiology.
He completed his Internal Medicine residency at Case Western Reserve University and University Hospitals Cleveland Medical Center, followed by fellowships in Cardiovascular Disease and Advanced Cardiac Imaging at Cleveland Clinic Foundation.
Dr. Unzek combines clinical cardiology with advanced diagnostic imaging to help patients better understand their heart health and the next steps in their care.
Meet Dr. Samuel Unzek
Cardiologist and Advanced Cardiac Imaging Specialist
Samuel Unzek Freiman, MD, FACC, FASE, FASNC
Dr. Samuel Unzek is a cardiologist and Advanced Cardiac Imaging Specialist with more than 20 years of medical experience. He is board-certified in Internal Medicine and Cardiovascular Medicine, with additional board credentials in Echocardiography and Nuclear Cardiology.
He completed his Internal Medicine residency at Case Western Reserve University and University Hospitals Cleveland Medical Center, followed by fellowships in Cardiovascular Disease and Advanced Cardiac Imaging at Cleveland Clinic Foundation.
Dr. Unzek combines clinical cardiology with advanced diagnostic imaging to evaluate each patient’s symptoms, cardiovascular risk factors and imaging findings within the broader context of their heart health.
What to Expect During Your Cardiac CT Scan
The Astra Healthcare team will provide preparation instructions based on the Cardiac CT exam ordered.
A Coronary CT Angiogram uses IV contrast and may include medication to temporarily slow the heart rate. Coronary Calcium Scoring does not require contrast or an injection.
The scan is performed while you lie on the CT table and briefly hold your breath. Afterward, the results will be reviewed and any recommended next steps will be discussed with you.
Schedule Your Cardiac CT
Contact Astra Healthcare to learn more about Coronary CT Angiography, Coronary Calcium Scoring and advanced coronary analysis.
Our Locations
- Tempe Office
- 8655 S. Priest Drive - Tempe, AZ 85284
- Phone: (480) 462-2716
- Phoenix Office
- 7010 E. Chauncey Lane, Suite 120 - Phoenix, AZ 85054
- Phone: (480) 462-2716
Contact our team to confirm availability, referral requirements and preparation instructions for your exam.
Frequently Asked Questions
A Coronary CT Angiogram uses intravenous contrast to create detailed images of the coronary arteries, including plaque and areas of narrowing. Coronary Calcium Scoring does not use contrast and measures calcified plaque to support cardiovascular risk assessment.
A Coronary CT Angiogram can help physicians evaluate the presence and location of coronary plaque, the degree of arterial narrowing and other anatomical abnormalities involving the coronary arteries.
A Coronary CT Angiogram requires intravenous contrast. Coronary Calcium Scoring does not require contrast dye or an injection.
A Coronary CT Angiogram generally takes approximately 30 to 60 minutes. Coronary Calcium Scoring usually takes approximately 10 to 15 minutes.
Order, referral and prior authorization requirements may vary according to the examination and insurance plan. Astra Healthcare works with several major insurance providers, and the team can help review the requirements before scheduling.
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