| Echo Feature | Sensitivity | Specificity | Positive predictive value | Negative predicitive value |
| Fibrin Strand | 74% | 70% | 58% | 82% |
| Thickened fluid/Exudates | 78% | 70% | 60% | 85% |
| Shaggy pericardium | 39% | 80% | 53% | 69% |
| Thickened pericardium | 44% | 95% | 78% | 70% |