Table 3.

Cardiovascular system parameters in the studied group (n = 80) at the control level and during apnea with face immersion

PhaseHR, beats/minSBP, mmHgDBP, mmHgPWA, pmPTT, ms
Control level64.75 ± 10.9113.8 ± 10.771.0 ± 6.11.67 ± 1.4217.0 ± 18.8
Face immersion 259.5 ± 17.5130 ± 17.8*84.0 ± 12.0*0.35 ± 0.3199.0 ± 35.8*
Recovery 263.5 ± 11.5121.1 ± 13.376.5 ± 9.80.36 ± 0.9195.8 ± 26.6*
Face immersion 358.3 ± 16.1128 ± 20.1*83.0 ± 17.80.35 ± 0.27200.0 ± 26.7*
Recovery 367.3 ± 11.7119.3 ± 11.774.2 ± 8.00.97 ± 0.94*191.4 ± 27.7*
  • All data are group means ± SD. HR, heart rate; SBP, systolic blood pressure; DBP, diastolic blood pressure; PWA, pulse wave amplitude; PTT, pulse transit time; pm, per mille from calibrated signal.

  • * P < 0.05,

  • P < 0.01 compared with the control level (Wilcoxon test).