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Pre-test Probability in CCS — EECC MCQ

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EasyCoronary Artery DiseasePre-test Probability in CCSEECC

A 45-year-old man with well-controlled hypertension has a pre-test probability (PTP) of obstructive CAD estimated at 5% using the 2024 ESC updated PTP model. He has atypical chest pain with exertional breathlessness. What does this PTP value imply according to the 2024 ESC CCS Guidelines?

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Correct answer: E — CAD can be excluded without further testing in most cases; consider non-cardiac causes

The 2024 ESC CCS Guidelines updated the PTP model, which now assigns lower probabilities than previous models, reflecting contemporary prevalence data. A PTP of 5% is below the testing threshold (approximately 5-15% depending on the model), meaning the likelihood of obstructive CAD is very low and further cardiac investigation is generally not warranted. Non-cardiac causes of symptoms should be explored. However, clinicians should consider 'likelihood modifiers' (e.g. risk factors, exercise ECG, coronary calcium score) that might reclassify the patient to a higher probability warranting investigation. CTCA is recommended for PTP in the low-intermediate range (approximately 5-50%).

Reference: ESC (2024): Guidelines for the Management of Chronic Coronary Syndromes