Responses to low dose intravenous perindoprilat infusion in salt deplete/salt replete normotensive volunteers.
1. Intravenous ACE inhibitor therapy appears to have a role in the treatment of acute heart failure and early after myocardial infarction. Practical experience with intravenous administration with activation of renin is limited. We report responses to perindoprilat (Pt, 0.67 mg) or placebo (P) infused over 4 h in normotensive male volunteers (n = 12, 19-28 years, 53-77 kg) with double-blind, placebo controlled salt depletion (SD) or salt repletion (SR) as a model of the activated renin system. 2. Salt depletion caused no significant fall in serum sodium (P, 139.4 +/- 2.4; Pt, 138.3 +/- 1.9) compared with salt replete preparation (P, 139.9 +/- 1.2; Pt, 139.7 +/- 0.9) but elevation of plasma renin activity 2-3-fold. Pretreatment baseline systolic blood pressure following salt depletion (P, 121 +/- 9.3/71 +/- 7.9; Pt, 121.5 +/- 9.6/69 +/- 8.1) was higher than following salt replete preparation (P, 114 +/- 9.5/61 +/- 7.2; Pt, 116.9 +/- 6.9/67 +/- 7.2). 3. Baseline corrected supine SBP fell significantly and to a similar extent following active treatment regardless of activation of the renin system (SD, -14.6 +/- 9.5/-9.4 +/- 6.4; SR, -12 +/- 14/-10.1 +/- 6.6) compared with placebo (SD, -6.1 +/- 6/-3.7 +/- 5.6; SR, -4.7 +/- 10/-1.3 +/- 6.5). Heart rate was unchanged.(ABSTRACT TRUNCATED AT 250 WORDS)
MacFadyen
R J
RJ
University Department of Medicine and Therapeutics, Gardiner Institute, Western Infirmary, Glasgow.
Lees
K R
KR
Reid
J L
JL
D000328:Adult; D000806:Angiotensin-Converting Enzyme Inhibitors / Q000008:administration & dosage / Q000494:pharmacology*; D001794:Blood Pressure / Q000187:drug effects*; D018592:Cross-Over Studies; D004039:Diet, Sodium-Restricted / Q000009:adverse effects; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D004573:Electrolytes / Q000097:blood / Q000652:urine; D005665:Furosemide / Q000494:pharmacology; D006333:Heart Failure / Q000188:drug therapy; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D007211:Indoles / Q000008:administration & dosage / Q000494:pharmacology*; D008297:Male; D012083:Renin / Q000097:blood; D012084:Renin-Angiotensin System / Q000187:drug effects* / Q000502:physiology; D012964:Sodium / Q000008:administration & dosage / Q000097:blood
D000806:Angiotensin-Converting Enzyme Inhibitors; D004573:Electrolytes; D007211:Indoles; C053500:perindoprilat; D005665:Furosemide; D012964:Sodium; D012083:Renin