| Rawles JM and Kenmure ACR, 1976, UK | 157 patients with acute uncomplicated myocardial infarction | PRCT | Incidence of arrhythmias | More sinus tachycardia in oxygen group (p<0.05); no other significant differences | No power calculation |
| Oxygen v compressed air via MC mask at 6l/min for 24 hours | | Number of patients given analgesics/number of doses given (diamorphine) | No significant difference | No assessment of pain scores |
| | | Mortality | 9 v 3 deaths (not significant) | Effect of implementing intention to treat analysis not discussed |