Table 11.5 Probability of Pulmonary Embolism Based on Ventilation-Perfusion Scan Results and Clinical Suspicion in the Prospective Investigation of Pulmonary Embolism Diagnosis (PIOPED Investigators) Study
| Ventilation-Perfusion Scan Results | Clinical Suspicion of Pulmonary Embolism* | ||
| Low | Intermediate | High | |
| High probability | 56% | 88% | 96% |
| Intermediate probability | 16% | 28% | 66% |
| Low probability | 4% | 16% | 40% |
| Normal/near-normal probability | 2% | 6% | 0% |