Relation between change in ejection fraction on follow up on medical treatment and contractile reserve at baseline
| ΔEF on F/U | CR+ | CR− |
| Stable | 13 | 1 |
| Worse | 8 | 13 |
| χ2 = 10.5 (p = 0.001) | ||
CR+, positive contractile reserve; CR−, negative contractile reserve; ΔEF on F/U, change in ejection fraction on follow up.