BMJ Group Jun 6 2025 The combination of alcohol plus cabin pressure at cruising altitude may threaten sleeping plane passengers' heart health, particularly on long haul flights, suggests the first study of its kind, published online in the respiratory journal  Thorax . The duo lowers the amount of oxygen in the blood (SpO2) and raises the heart rate for a protracted period, even in the young and healthy, the findings indicate. The higher the alcohol consumption, the greater these effects might