1. The amplitude of oscillation of end-tidal CO2 correlates to the amplitude of oscillation of cardiac output for both patients with heart failure (no fill) and subjects with normal systolic function (solid black fill).
The amplitude of oscillation of end-tidal CO2 correlates to the amplitude of oscillation of cardiac output for both patients with heart failure (no fill) and subjects with normal systolic function (solid black fill). The amplitude of ventilatory oscillation is closely correlated to the amplitude of oscillation of end-tidal CO2 with the regression line for heart failure patients in grey interrupted and for non-heart failure patients in black interrupted. Typically, for any given change in end-tidal CO2 there was a greater change in ventilation in the heart failure patients than the non-heart failure patients.
Resham Baruah et al. Open Heart 2014;1:e000055
©2014 by British Cardiovascular Society