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Figure 2 The effect of intravenous isoprenaline on changes in the duration of the heart rate corrected electromechanical systole (QS2c) (ms) in HD patients and healthy volunteers. Values are given as means ± SEM. Significant differences between both groups are indicated by an asterisk (p < 0.05). Basal values: HD patients, 505 ± 16 (n = 4); healthy, 511 ±10 ms (n = 6).
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