A liberal oxygen strategy has the same impact on 30-day mortality as a conservative protocol in patients with acute coronary syndrome, according to late breaking results from the NZOTACS (New Zealand Oxygen Therapy in Acute Coronary Syndromes) trial, presented at ESC Congress 2019 in Paris. The liberal oxygen strategy seemed beneficial in the subgroup of patients with ST-segment elevation myocardial infarction (STEMI). “This finding if correct would be important, but its significance may be argued because this analysis was not the primary outcome for the study”, said principal investigator Ralph Stewart of Green Lane Cardiovascular Service, Auckland City Hospital, that we interviewed at ESC Congress.