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Figure 1 Original tracing of HR and LVP during coronary occlusion (upper panel). ST segment was elevated during coronary occlusion. HR and LVP oscillation appeared at 55 s after the balloon inflation (Inf) and disappeared after the balloon deflation (Def). Wavelet analysis (lower panel) clearly demonstrates augmentation of low-frequency fluctuation (0.05–0.06 Hz) of RR and LVSP during coronary occlusion. HR = heart rate; LVSP = left ventricular systolic pressure; LVP = left ventricular pressure; RR = RR intervals.
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