Figure 1.

Comparison of blood pressure and heart rate between two horizontal postures (prone ▪ and supine ▫). Expressed as mean ± SD and compared using paired t-tests. Left scale applies to MAP, SYS, and DIA, right scale only to HR; DIA = diastolic blood pressure, HR = heart rate, MAP = mean arterial pressure, SYS = systolic blood pressure, BPM = beats per minute, and * = statistically significant difference from value in prone posture.