Cardiology Made Clearwith Dr. Freeman
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CLINICIAN GUIDE · CARDIAC TESTING EXPLAINED · SECTION 1 OF 3

Choosing the right cardiac test

Match the diagnostic method to the clinical question.

Start with a clinical question

A useful test addresses a specific uncertainty and can change management. Describe the symptom, timing, suspected mechanism, prior results, and the action an abnormal result would trigger.

Electrical rhythm or conduction?

12-lead EKG; longer rhythm monitoring when intermittent

Chamber function or valve disease?

Transthoracic echo

Inducible ischemia or exercise response?

Selected exercise or pharmacologic stress test

Coronary plaque or stenosis anatomy?

Coronary CT angiography (CCTA)

Scar, inflammation, or infiltrative disease?

Cardiac MRI; selected additional imaging

Calcified plaque for prevention decisions?

Coronary artery calcium (CAC) score

[1][2][4][5][6]

Structure, function, perfusion, and rhythm differ

A normal resting EKG does not exclude intermittent arrhythmia or coronary disease. A preserved EF does not exclude HFpEF. A normal stress study does not mean there is no plaque. Interpret the result against the question and the patient’s risk.

[1][3][6][7]

Acute symptoms use an acute pathway

Ongoing concerning chest pain, severe dyspnea, syncope with instability, or suspected dangerous arrhythmia requires emergency evaluation. Do not book an elective stress test while waiting for an unstable presentation to resolve.

[7]

Clinical references

  1. AHA: Echocardiography
  2. AHA: Exercise stress testing
  3. AHA: PET and SPECT perfusion
  4. AHA: CCTA
  5. AHA: Cardiac MRI
  6. ISHNE/HRS ambulatory ECG consensus
  7. 2021 chest pain guideline

Adult clinician education · References reviewed October 11, 2026.