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Table 2 Cardiac function parameters during spontaneous breathing and the 2/2 and 4/4 breathing patterns

From: Increased cardiorespiratory synchronization evoked by a breath controller based on heartbeat detection

  Spt 2/2 4/4
SBP (mmHg) 114.81 ± 2.57 112.10 ± 2.74* 114.81 ± 2.69#
DBP (mmHg) 61.47 ± 1.65 59.29 ± 1.83** 61.52 ± 1.79#
MBP (mmHg) 79.25 ± 1.84 76.89 ± 2.03** 79.28 ± 1.97#
HR (beat/min) 73.04 ± 2.10 74.66 ± 2.36 74.05 ± 2.11
SV (mL/beat) 144.22 ± 5.66 137.61 ± 5.77* 145.65 ± 5.53##
CO (L/min) 10.40 ± 0.42 10.12 ± 0.43 10.56 ± 0.42#
  1. Data are presented as the mean ± SEM
  2. Spt, spontaneous breathing; 2/2, 2/2 breathing pattern; 4/4, 4/4 breathing pattern; SBP, systemic blood pressure; DBP, diastolic blood pressure; MBP, mean blood pressure; HR, heart rate; SV, stroke volume; CO, cardiac output
  3. * and ** p < 0.05 and p < 0.01, respectively, vs spontaneous breathing (paired t test). # and ## indicate p < 0.05 and p < 0.01, respectively, for comparison of the 4/4 breathing pattern and the 2/2 breathing pattern