Causes of bradycardia expressed as percentage of total causes (N = 319)
| Causes | Hypotension | Bradycardia | H-brady | CA-brady | N-brady |
|---|---|---|---|---|---|
| H-brady, bradycardia in association with hypotension; CA-brady, bradycardia in association with cardiac arrest; N-brady, bradycardia without associated hypotension. | |||||
| Allergy | 7 | 2 | 3 | 2 | 0 |
| Airway problem | 4 | 16 | 7 | 10 | 31 |
| Hypovolaemia | 9 | 3 | 4 | 5 | 0 |
| Regional anaesthesia | 17 | 9 | 16 | 9 | 7 |
| Drug effects | 26 | 28 | 30 | 31 | 19 |
| Cardiopulmonary | 5 | 5 | 4 | 10 | 3 |
| Reflexes | 6 | 14 | 14 | 13 | 15 |
| Posture | 1 | 1 | 1 | 1 | 0 |
| Sepsis | 1 | 2 | 1 | 5 | 0 |
| Surgery | 2 | 4 | 2 | 7 | 6 |
| Pre-existing condition | 1 | 3 | 3 | 2 | 2 |
| Central nervous system | 0 | 1 | 0 | 2 | 0 |
| Endocrine | 1 | 3 | 2 | 0 | 2 |
| Monitoring error | 2 | 1 | 1 | 0 | 2 |
| Other | 1 | 0 | 0 | 0 | 6 |
| Not determined | 16 | 8 | 11 | 3 | 7 |
| Total (%) | 99 | 100 | 99 | 100 | 100 |