Fig. 1

Distributions in changes in LF power with head-up tilting among 90 healthy subjects (upper panel) and among 250 patients undergoing coronary angiography (lower panel). Vertical-dashed lines indicate the cutoff points for the trisection of the LF response into large drop (D2, n = 82), small drop (D1, n = 83), and rise (R, n = 85) in angiographic patients. With the same cutoff, healthy subjects divided into D2 (n = 28), D1 (41), and R (n = 21). Out of 250 patients, 25 died during 99 months of follow-up. Letters at the top of the bars in the upper panel indicate the cause of death of individual patients: A, acute myocardial infarction (MI); F, fatal stroke; N, noncardiac causes; S, sudden cardiac death. Modified Fig. 2 of reference [25]