Comprehensive Cardiology and Advanced Cardiac Testing
Astra Healthcare provides physician-led cardiovascular evaluations, diagnostic testing and advanced imaging for symptoms, risk assessment and ongoing heart care
- Phoenix & Tempe, AZ
Our Cardiology Services
Cardiology Consultation
Evaluation of symptoms, medical history and cardiovascular risk factors.
Echocardiogram
Ultrasound imaging used to assess heart structure, valves and function.
Nuclear Stress Testing
Evaluates blood flow to the heart at rest and during controlled stress.
Electrocardiogram
Records the heart’s electrical activity, rate and rhythm.
ECG Stress Testing
Monitors how the heart responds to physical activity.
Holter Monitoring
Continuously records the heart rhythm during normal daily activities.
Lower Extremity Ultrasound
Evaluates blood flow and vascular conditions in the legs.
Carotid Ultrasound
Examines blood flow and plaque buildup in the carotid arteries.
Cardiac PET Imaging
Measures myocardial 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.
Conditions We Evaluate
Astra Healthcare evaluates a broad range of cardiovascular symptoms and conditions, including:
- Chest pain and Angina
- Palpitations and Arrhythmias
- Shortness of breath
- Dizziness and Syncope
- Atrial Fibrillation and Atrial Flutter
- Hypertension and high cholesterol
- Coronary Artery Disease
- Heart Failure
- Cardiomyopathies
- Heart murmurs and valve conditions
- Peripheral Vascular Disease
- Pericardial and aortic conditions
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 testing to help patients better understand their cardiovascular health and the next steps in their care.
Schedule Your Cardiology Consultation
Contact Astra Healthcare to schedule a cardiovascular evaluation or learn more about our available diagnostic services.
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 Cardiology evaluation may be appropriate if you experience chest discomfort, palpitations, shortness of breath, dizziness, fainting or swelling in the legs.
The appropriate examination depends on your symptoms, medical history and previous results. Your cardiologist will recommend the most relevant test for your needs.
Yes. Astra Healthcare provides Echocardiograms, ECGs, Stress Testing, Holter Monitoring, vascular ultrasounds and advanced cardiac imaging.
Requirements may vary depending on the examination and your insurance plan. Our team can review the necessary steps before your appointment.
Astra Healthcare works with several major insurance providers. Coverage and prior authorization requirements vary by plan and service.
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