Which strategy is more effective for the treatment of cardiovascular disease: high-dose angiotensin II type 1 receptor antagonist monotherapy or combination therapy?
Angiotensin II type 1 (AT(1)) receptor antagonists (blockers) [ARBs] are highly selective for the AT(1) receptor and block the diverse effects of angiotensin II. When high BP is not controlled by low-dose ARB monotherapy, physicians need to employ another strategy, either high-dose ARB monotherapy or combination therapy with calcium channel antagonists (blockers) [CCBs], diuretics, or other agents. High-dose ARB monotherapy is more effective for decreasing proteinuria than low-dose ARB monotherapy or CCBs. Although the ARB valsartan has been shown to prevent coronary restenosis in a clinical study (Val-PREST [Valsartan for prevention of restenosis after stenting of type B2/C lesions]), it is still unclear whether ARBs help to prevent restenosis. The results reported by Peters in this issue highlight the relative efficacies of low- (80 mg/day) and high-dose valsartan (160-320 mg/day) for the prevention of in-stent restenosis after the implantation of bare-metal stents, and suggest that high-dose valsartan can reduce the in-stent restenosis rate, target lesion revascularization and target vessel revascularization rates, late lumen loss, and major adverse cardiac events rate more effectively than low-dose valsartan. A better understanding of the differences in the efficacies of high- and low-dose ARBs could be useful in the treatment of patients with cardiovascular disease and may resolve the issue of whether ARBs prevent coronary restenosis. Clinical benefits may be induced by complete blockade of the renin-angiotensin system using high-dose ARB monotherapy. Therefore, physicians need to select a strategy carefully; i.e. either high-dose ARB monotherapy or combination therapy.
Miura
Shin-Ichiro
S
Department of Cardiology, Fukuoka University School of Medicine, Fukuoka, Japan. miuras@cis.fukuoka-u.ac.jp
Saku
Keijiro
K
D047228:Angiotensin II Type 1 Receptor Blockers / Q000494:pharmacology / Q000627:therapeutic use*; D002317:Cardiovascular Agents / Q000494:pharmacology / Q000627:therapeutic use; D002318:Cardiovascular Diseases / Q000188:drug therapy*; D004359:Drug Therapy, Combination; D006801:Humans; D044140:Receptor, Angiotensin, Type 1 / Q000187:drug effects; D016896:Treatment Outcome
D047228:Angiotensin II Type 1 Receptor Blockers; D002317:Cardiovascular Agents; D044140:Receptor, Angiotensin, Type 1