Effect of Acute Mental Stress on Heart Rate and QT Variability in Postmyocardial Infarction Patients
Figure 1
Example of short-period power spectra for systolic blood pressure (SBP), RR and QT interval recorded at baseline (a, b, c) and during the anger recall test (AR) (d, e, f). Note that SBP, RR, LFSBP, and (total RR interval variance), LFRR, and QT variance all increase markedly during the AR.
