Heart health guide
CAC vs. CCTA
A CAC scan measures calcified plaque without contrast. CCTA uses contrast to show coronary anatomy, including narrowing and some noncalcified plaque. Each test answers a different clinical question.
Which one is used for prevention decisions?
CAC can help when estimated risk leaves a preventive treatment decision uncertain. CCTA is typically used to answer a specific diagnostic question after a clinician assesses the person.
What if I have new chest pressure or other possible heart attack symptoms?
Call 911 in the U.S. for possible heart attack symptoms. A screening scan or routine outpatient booking can delay emergency care.