Figure 10
From: Assessment of pulse rate variability by the method of pulse frequency demodulation
Influence of ventricular ectopies on assessment by PFDM. The amplitudes of spectral components were calculated for 5-min sequential segments of demodulated pulse interval by PFDM and ECG R-R interval in three subjects with frequent ventricular ectopies. Panel A: the difference in pulse rate (PR) and heart rate (HR). Panel B: the difference in the amplitude of low-frequency component of pulse interval (LFPRV) and that of R-R interval (LFHRV). Panel C: the difference in the amplitude of high-frequency component of pulse interval (HFPRV) and that of R-R interval (HFHRV). All data are plotted against percentage of ventricular ectopies within each 5-min segment.