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Pressure-volume relationships. Serial assessment of LV EDP-EDV relationship prior to pacing (baseline), after 2 wk of pacing at 125/min, and 2 wk after pacing cessation (reversal). All time points include a baseline measurement followed by measurements after three 250-ml normal saline infusions. Error bars represent SE. Slope of lines represents LV compliance. *P < 0.05.
