Rest | Dobutamine stress | ||||||||
---|---|---|---|---|---|---|---|---|---|
Low dose | Peak dose | ||||||||
PSSR | SS | PSS | PSSR | SS | PSS | PSSR | SS | PSS | |
Control | N | N | 0* | ↗ | ↗ | 0 | ↗↗ | /↘ | 0 |
Acute ischaemia | ↓ | ↓ | ↑ | ↘ | ↘ | ↗ | ↘↘ | ↘↘ | ↗↗ |
Stunning | ↓ | ↓ | ↑ | ↗ | ↗ | ↘ | ↗↗ | /↘ | 0 |
Chronic ischaemia/hibernation | ↓ | ↓ | ↑ | ↗ | ↗ | ↗ | ↘ | ↘ | ↗↗ |
Non-transmural infarction | ↓↓ | ↓↓ | ↑ | ↘ | ↘ | ↗ | ↘↘ | ↘↘ | ↗↗ |
Transmural infarction | 0 | 0 | 0 | → | → | → | → | → | → |
Adapted from Bijnens et al.7
*May be present in up to two-fifths of the normal population at rest but if present is of low magnitude.
0 Absent; ↓ Reduced; ↑ Increased; ↗ Increased vs rest; ↘ Decreased vs rest;/↘ Initial increase followed by decrease; ↗↗ Further increasing; ↘↘ Further decreasing.
PSS, post-systolic shortening; PSSR, peak systolic strain rate, SS, systolic strain.