Which test is used to evaluate a suspected pulmonary embolism when clinical data and the V/Q scan are contradictory?

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When suspicion for a pulmonary embolism remains high but the noninvasive tests don’t align with the clinical picture, you need definitive visualization of the pulmonary arteries. Pulmonary angiography directly images the arterial tree and reveals filling defects caused by emboli, making it the most reliable way to confirm or exclude PE in this discordant scenario. Historically the gold standard, it provides definitive anatomic evidence and can guide or enable interventional therapy if needed. Other tests like ABG or D-dimer are non-specific and cannot confirm the diagnosis, while V/Q results can be inconclusive or misleading in some patients. Modern practice often uses CT pulmonary angiography, but when clinical data and V/Q findings conflict, pulmonary angiography remains the most decisive option.