Document Classification

Section Type: RESULTS

Text: Both beta-blockers increased the mean (+ / - SD) RR interval (placebo = 808 + / -21, nadolol = 1, 054 + / -30, metoprolol = 1, 031 + / -27 ms ; p < 0. 0001), RSA (placebo = 542, nadolol = 1, 177, metoprolol = 1, 316 ms2 ; p = 0. 002), and the gain (placebo = 13. 6 + / -1. 5, nadolol = 21. 9 + / -2. 8, metoprolol = 24. 5 + / -3. 6 ms/mm Hg ; p < 0. 002), and both modified the phase function (placebo = -21. 1 + / -5. 3, nadolol = -1. 8 + / -4. 9, metoprolol = -2. 9 + / -4. 2 degree ; p < 0. 0001).