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Figure 1 Black circles indicate the patients and the controls who performed ¹²⁵I-Ang I kinetics study. (A) Aortic (A) and coronary sinus (CS) plasma concentrations of Angiotensin (Ang) I and II in anginal patients and in controls. (B) Relationship between cardiac Ang II formation and overall duration of ischemia in the five days of Holter monitoring preceding the study of cardiac RAS. (C) The amount of Ang II formed was not related to the time elapsed since the last ischemic episode or anginal attack (F = 1.8). Ang = angiotensin; RAS = renin-angiotensin system; SA = stable effort angina; UA = unstable angina.