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  • Title: Ventilation-perfusion scanning and pulmonary angiography: correlation in clinical high-probability pulmonary embolism.
    Author: Braun SD, Newman GE, Ford K, Miller GA, Coleman RE, Dunnick NR.
    Journal: AJR Am J Roentgenol; 1984 Nov; 143(5):977-80. PubMed ID: 6333167.
    Abstract:
    During a 3-year period, 173 clinically selected patients underwent pulmonary angiography to confirm or exclude acute pulmonary embolism. All patients had undergone ventilation-perfusion (V/Q) scanning (167 patients) or perfusion scanning alone (six) before angiography. Angiography was done because the results of the V/Q scanning did not satisfy the clinician's needs for certainty. The results of the V/Q and studies were compared to determine the relative accuracy of V/Q scanning in this clinical setting. Pulmonary embolism was found in seven (15%) of 47 patients with low-probability scans, 11 (32%) of 34 patients with intermediate-probability scans, 22 (39%) of 57 patients with indeterminate scans, and 23 (66%) of 35 patients with high-probability scans. In this clinically selected population, low-probability scans were more accurate in excluding pulmonary embolism than were high-probability scans in establishing that diagnosis.
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