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Figure 2 Plasma aldosterone (ALDO) concentrations in the aortic root (AO) and coronary sinus (CS) in patients with congestive heart failure (CHF). Left panel shows data of ALDO in 96 CHF patients who did not receive spironolactone; right panel shows data of ALDO in 17 CHF patients who received spironolactone. *, p < 0.0001 vs. the value of AO.