Fig. 4
Dietary K+ supplementation attenuates cardiorespiratory coupling in CHF. A Representative traces of ventilatory flow (Flow, ml/s) and arterial blood pressure (BP, mmHg) in one Sham rat, one CHF rat and one CHF+K+ rat. Tidal volume (VT) is marked in blue while systolic blood pressure (SBP, mmHg) is shown in red. Note that in CHF rats, oscillations in ventilation are phase with increases in SBP, reflecting a positive interaction between signals. B Summary data showing the magnitude of coherence between VT and SBP centered at the very low frequency (vLF) peak of VT. C Summary data showing coherence function between respiratory frequency (RF) and heart rate (HR). *P < 0.05 vs Sham, #P < 0.05 vs CHF+K+. Holm Sidak post hoc after One-Way ANOVA, n = 5 rats per group