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Figure 3 Average peripheral arterial tonometry response to reactive hyperemia (RH-PAT index) on the four study days. *p < 0.05; p < 0.05 vs. pre-enhanced external counterpulsation (EECP) RH-PAT indexes on day 1, day 17, and day 35. Open bars = pre-EECP; solid bars = post-EECP.