title: Intraindividual blood pressure responses to angiotensin-converting enzyme inhibition and angiotensin receptor blockade.
abstract: This study aims to test the hypothesis that in some hypertensive subjects the blood pressure (BP) response to angiotensin-converting enzyme inhibition differs from that to angiotensin receptor blockade (ARB); a responder to angiotensin-converting enzyme inhibition may not respond to ARB or the opposite. A randomized, open-label, crossover, comparative trial of lisinopril 20 mg compared with telmisartan 80 mg (5 weeks per treatment period) was conducted in 32 untreated hypertensives using 24-hour ambulatory BP monitoring. Subjects were classified as "responders" and "nonresponders" using an arbitrary threshold of ambulatory BP response (> or =10 mm Hg systolic or > or =5 diastolic) or the median response achieved by each drug. No difference was detected between the drugs in their effect on ambulatory BP (mean difference 1.2+/-7.1/0.7+/-5.1 mm Hg, systolic/diastolic). Significant correlations were found between the antihypertensive responses to the two drugs (r=0.77, p<0.001). Using the arbitrary response criterion, there was a difference between the drugs in the responses in 28%/13% of subjects (9/4 patients) for systolic/diastolic BP (19%/25% using the median response criterion). These data suggest that in some hypertensive patients the BP response to angiotensin-converting enzyme inhibition may fail to predict the response to ARB. It appears that there are differences in the antihypertensive action of angiotensin-converting enzyme inhibitors and ARBs that may be clinically important.
authors.affiliation: Hypertension Center, Third University Department of Medicine, Sotiria Hospital, 152 Mesogion Avenue, Athens 11527, Greece. gstergi@med.uoa.gr
authors.forename: George S
authors.initials: GS
authors.lastname: Stergiou
authors.forename: Stamatis P
authors.initials: SP
authors.lastname: Efstathiou
authors.forename: Leonidas G
authors.initials: LG
authors.lastname: Roussias
authors.forename: Theodore D
authors.initials: TD
authors.lastname: Mountokalakis
mesh_terms: D047228:Angiotensin II Type 1 Receptor Blockers / Q000627:therapeutic use*; D000806:Angiotensin-Converting Enzyme Inhibitors / Q000627:therapeutic use*; D000959:Antihypertensive Agents / Q000627:therapeutic use*; D001562:Benzimidazoles / Q000627:therapeutic use*; D001565:Benzoates / Q000627:therapeutic use*; D001794:Blood Pressure / Q000187:drug effects*; D018660:Blood Pressure Monitoring, Ambulatory; D018592:Cross-Over Studies; D005260:Female; D006801:Humans; D017706:Lisinopril / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D000077333:Telmisartan
chemical_list: D047228:Angiotensin II Type 1 Receptor Blockers; D000806:Angiotensin-Converting Enzyme Inhibitors; D000959:Antihypertensive Agents; D001562:Benzimidazoles; D001565:Benzoates; D017706:Lisinopril; D000077333:Telmisartan