Figure 1.
Respiratory frequency oscillations in time and frequency domain. Representative examples of oscillations in monophasic action potential duration (MAPD) in the time domain (top) and frequency domain (bottom) during (A) sinus rhythm (SR), (B) acutely after creation of AV block (AAVB), and (C) after remodeling at chronic AV block (CAVB). A clear increase in a 0.2 Hz oscillation is seen at CAVB.