RT Journal Article SR Electronic T1 β Adrenergic blockers lower renin in patients treated with ACE inhibitors and diuretics JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 45 OP 48 DO 10.1136/hrt.80.1.45 VO 80 IS 1 A1 Holmer, S R A1 Hense, H-W A1 Danser, A H J A1 Mayer, B A1 Riegger, G A J A1 Schunkert, H YR 1998 UL http://heart.bmj.com/content/80/1/45.abstract AB Objective To examine the effect of concomitant intake of β blockers with angiotensin converting enzyme (ACE) inhibitors, diuretics, or both on plasma renin concentrations in a population based sample (MONICA survey, Augsburg, Germany).Subject and methods 728 individuals were studied, of whom 171 were treated using monotherapy (ACE inhibitor (n = 21), diuretic (n = 10), or β blocker (n = 72)), or combination treatment (ACE inhibitor + diuretic (n = 32), ACE inhibitor + β blocker (n = 7), diuretic + β blocker (n = 22), ACE inhibitor + diuretic + β blocker (n = 7)). The remaining 557 individuals were untreated. Indications for treatment were hypertension (75%), coronary artery disease with (12%) or without (3%) hypertension, or unknown (10%).Results Mean (SEM) renin concentrations in individuals treated with an ACE inhibitor (41 (8) mU/l), a diuretic (41 (10) mU/l), or the combination of an ACE inhibitor and a diuretic (54 (10) mU/l) were raised compared with untreated individuals (17 (1) mU/l; p < 0.05 each). Monotherapy with a β blocker, however, decreased mean renin concentrations (12 (1) mU/l; p < 0.01 v untreated). Renin concentrations in individuals taking a β blocker with either an ACE inhibitor (21 (8) mU/l), or a diuretic (22 (4) mU/l), or with both an ACE inhibitor and a diuretic (21 (7) mU/L), were significantly lower compared with renin concentrations in groups not receiving β blocker treatment (p < 0.05 each).Conclusion These data suggest that the upregulation of renin by treatment with ACE inhibitors, diuretics, or both can be largely prevented by concomitant β blocker treatment.