| No | Age (yrs.) | Sex | ASA | Status | Anaesthesia technique | Surgery | Medical history | Details |
| 1 | 40 | M | 5 | Emergency | General | Laparotomy | Polytrauma?Fall from height. | Arrived in OT in extremis with unrecordable blood pressure Developed pulseless electrical activity (PEA) in OT |
| 2 | 70 | M | 5 | Emergency | General | Laparotomy | Polytrauma?Road traffic accident Ischaemic heart disease (IHD) status post coronary artery bypass graft (CABG), DM, HTN | Brought to OT hypotensive Developed VF intraoperatively then asystole |
| 3 | 36 | M | 5 | Emergency | General | Laparotomy | Polytrauma?Fall from height | PEA prior to transfer to OT |
| 4 | Young | M | 5 | Emergency | General | Laparotomy | Polytrauma?Road traffic accident | PEA prior to transfer to OT |
| 5 | 87 | M | 5 | Emergency | General | Open AAA repair | Ruptured AAA HTN, Dyslipidaemia | PEA on arrival to OT |
| 6 | 74 | M | 4 | Emergency | General | Open abdominal aortic aneurysm (AAA) repair | Leaking AAA with recent NSTEMI HTN, Dyslipidaemia, Chronic Renal Impairment | PEA after aortic crossclamp |
| 7 | 22 | F | 4 | Emergency | General | Pericardial window | Advanced breast cancer on chemotherapy Previous pericardial window with recollection of fluid | Intra-operatively: Suction in pericardial sac drained 1L of thick dark blood―suspected intracardiac drain, followed by cardiovascular collapse. |
| 8 | 65 | M | 4 | Emergency | General | Ventricular septal defect Repair | Post myocardial infarct Ventricular septal defect | Inferior infarct with ventricular septal rupture, hypotensive on intra-aortic ballon pump support preoperatively Unrepairable Ventricular septal defect |
| 9 | 68 | M | 5 | Emergency | General | Sternotomy, Haemostasis | Acute Myocardial Infarction with pericardial tamponade HTN, Gout | Failed paricardiocentesis in Emergency department, developed PEA and thoracotomy was done in emergency room releasing large amounts of blood and clots from pericardial cavity and open cardiac massage performed. Developed PEA on transfer to OT |
| 10 | 72 | F | 4 | Emergency | General | Open Cholecystectomy | Acute cholecystitis ESRF on Peritoneal dialysis DM, HTN, Previous stroke | PEA during intra-operative manipulation of gallbladder |
| 11 | 68 | M | 3 | Emergency | Combined Spinal-Epidural | Loop trephine colostomy | Advanced Rectal Cancer on palliative radiotherapy Ischaemic cardiomyopathy, previous stroke, DM, HTN, Dyslipidaemia | Hypotension Intra-op. In recovery, developed ischemic ECG changes, followed by ventricular fibrillation (VF) |
| 12 | 78 | F | 3 | Emergency | Local Anaesthesia | Angioplasty | ESRF, PVD for angioplasty | Arrest from likely bleeding. |