| Stress echocardiography | HYPER-Phen | Normocontractile phenotype |
|---|---|---|
| Chronotropic reserve | More frequently low (< 1.6) | More frequently normal (> 1.8) |
| Preload reserve | More frequently low (stress < rest) | More normal (stress > rest) |
| Inotropic reserve | More frequently low (< 1.6) | More frequently normal (> 1.8) |
| Cardiac reserve | Reduced (< 2.0) | More frequently normal (> 2.0) |
| B-lines ≥ 2 | More frequent | Less frequent |
| LVOTO (gradient < 30 mmHg) | More frequent | Less frequent |
LVOTO: left ventricular outflow tract obstruction; HYPER-Phen: hypercontractile phenotype