Performance of low-frequency power of the maximal amplitude of the first derivative of arterial pressure waveform as a cardiac sympathetic activity index

We assessed the time-frequency spectra of the maximal amplitude of arterial pulse first derivative (dP/dt<sub>max</sub>) series during four maneuvers provoking different sympathetic activity levels, and examined the relations between dP/dt<sub>max</sub> spectral measures and those of heart rate, systolic pressure (SP), and respiratory variabilities. Thirty… CONTINUE READING