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| Shivering |
| Anemia |
| Hypoxia |
| Electrolytic imbalance |
| Deterioration in diastolic dysfunction |
| Myocardial ischemia: directly affects relaxation and induces rhythm disturbances |
| Hypovolemia or hypervolemia (extreme volume shifting) |
| Tachycardia |
| Rhythms other than sinus |
| Postoperative sympathetic stimulation |
| Postoperative hypertensive crisis |
