Figure 1.

Heart rate and mean blood pressure during 10 min tilt table test. Heart rate and blood pressure were measured at pre-tilt, 3, 6, 9, and post-tilt. Error bars present standard errors of the mean (SEM). Heart rate changes between POTS and control were significantly different (p = 0.03) in repeated-measures analysis of variance (ANOVA) analysis. Heart rate changes between PASC and POTS, and PASC and control were not significantly different. Mean blood pressure remained unchanged throughout tilt table test in PASC, POTS, and control group (PASC n = 11; POTS n = 6; control n = 7). PASC stands for post-acute sequelae of SARS-CoV-2 syndrome; POTS stands for postural orthostatic tachycardia syndrome.