Comparison of clinical data in groups X and Y
| Group X | Group Y | p Value | |
|---|---|---|---|
| Number of patients | 14 | 23 | |
| Age (years) (mean (SD)) | 61 (8) | 59 (12) | NS |
| Sex: male/female | 11/3 | 21/2 | NS |
| Location of infarction: anterior/inferior | 7/7 | 15/8 | NS |
| Pressure–rate product at peak exercise (mm Hg.beats/min) (mean (SD)) | 23 997 (5136) | 22 370 (4835) | NS |
| Exercise induced ST elevation present (%)/absent (%) | 4 (29%)/10 (71%) | 12 (52%)/11 (48%) | NS |
| Exercise induced ST depression present (%)/absent (%) | 6 (43%)/8 (57%) | 5 (22%)/18 (78%) | NS |
| Number of diseased vessels | |||
| One vessel disease (%) | 10 (71%) | 22 (96%) | |
| Two vessel disease (%) | 3 (21%) | 1 (4%) | |
| Three vessel disease (%) | 1 (7%) | 0 | NS |
| % Stenosis of infarct related artery | |||
| 100% | 2 | 9 | |
| ⩽99% | 3 | 1 | |
| ⩽90% | 6 | 6 | |
| ⩽50% | 2 | 5 | |
| Unknown | 1 | 2 | NS |
| Collateral flow to infarct related artery | |||
| Grade 3 | 1 | 1 | |
| Grade 2 | 3 | 1 | |
| Grade 1 | 1 | 3 | |
| Grade 0 | 8 | 16 | |
| Unknown | 1 | 2 | NS |
| Dyskinetic segment present (%)/absent (%) | 2 (17%)/12 (83%) | 10 (48%)/11 (52%) | <0.05 |
| Global left ventricular wall motion abnormality index (mean (SD)) | 5.0 (2.8) | 6.0 (2.3) | NS |
Group X, patients with redistribution on exercise thallium-201 scan; group Y, patients without redistribution on exercise thallium-201 scan.