Table 2.
Yield of downstream testing after ETT.
| All (n=416, 11.4%) | Negative ETT (n=63, 3%) | Inconclusive ETT (n=260, 24.9%) | Positive ETT (n=94, 70%) | |
|---|---|---|---|---|
| Nuclear MPI | 270 (64.9%) | 40 (63%) | 184 (71%) | 47 (50%) |
| Normal | 233 (86%) | 37 (93%) | 159 (86%) | 37 (79%) |
| Inconclusive | 11 (4%) | 1 (3%) | 9 (5%) | 1 (2%) |
| Abnormal | 26 (10%) | 1 (3%) | 16 (9%) | 9 (19%) |
| Stress echocardiogram | 39 (9%) | 10 (16%) | 25 (10%) | 4 (4%) |
| Normal | 32 (82%) | 10 (100%) | 18 (72%) | 4 (100%) |
| Inconclusive* | 6 (15%) | 0 | 6 (24%) | 0 |
| Abnormal | 1 (3%) | 0 | 1 (4%) | 0 |
| Coronary CTA | 17 (4%) | 3 (5%) | 12 (5%) | 2 (2%) |
| No plaque, or stenosis < 50% | 13 (76%) | 2 (67%) | 11 (92%) | 0 |
| Inconclusive | ||||
| Uninterpretable | 1 (6%) | 0 | 0 | 1 (50%) |
| Stenosis 50–70% | 1 (6%) | 0 | 0 | 1 (50%) |
| Stenosis > 70% | 2 (12%) | 1 (33%) | 1 (8%) | 0 |
| Stress MRI (all negative) | 6 (1%) | 1 (2%) | 5 (2%) | 0 |
| Invasive Angiography | 84 (20%) | 9 (14%) | 34 (13%) | 41 (44%) |
| No obstructive CAD, no revascularization | 43 (51%) | 7 (78%) | 19 (56%) | 17 (41%) |
| Obstructive CAD, no revascularization | 4 (5%) | 0 | 3 (9%) | 1 (2%) |
| PCI | 24 (29%) | 1 (11%) | 12 (35%) | 11 (28%) |
| CABG | 13 (15%) | 1 (11%) | 0 | 12 (29%) |
*
all inconclusive stress echocardiogram results were due to submaximal exercise.