PS calculator currently used in our unit
| PS | |
| Female sex | 1 |
| Morbid obesity | 3 |
| Diabetes (type unspecified) | 3 |
| Hypertension (systolic blood pressure > 140 mm Hg | 3 |
| Left ventricular ejection fraction | |
| Good (> 49%) | 0 |
| Fair (30–49%) | 2 |
| Poor (< 30%) | 4 |
| Age | |
| 70–74 years | 7 |
| 75–79 years | 12 |
| > 79 years | 20 |
| Reoperation | |
| First | 5 |
| Second | 10 |
| Preoperative intra-aortic balloon pump | 2 |
| Left ventricular aneurysm | 5 |
| Emergency surgery following coronary angioplasty | 10 |
| Dialysis dependency | 10 |
| Valve surgery | |
| Mitral | 5 |
| If pulmonary artery pressure > 60 mm Hg add: | 8 |
| Aortic | 5 |
| If gradient > 120 mm Hg add: | 7 |
| CABG at time of valve surgery | 2 |
Catastrophic state (for example, patient receiving cardiopulmonary resuscitation while being transferred into operating theatre) add score of 10–50 (very rarely used).
CABG, coronary artery bypass graft.