Comparison of the efficacy between hydrochlorothiazide and chlorthalidone on central aortic pressure when added on to candesartan in treatment-naïve patients of hypertension

Beom June Kwon, Sung Won Jang, Kyu Young Choi, Dong Bin Kim, Eun Joo Cho, Sang Hyun Ihm, Ho Joong Youn, Jae Hyung Kim

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

Thiazide-type diuretics are the most commonly used blood pressure (BP)-lowering drug for patients with uncomplicated hypertension. However, it has remained unclear whether hydrochlorothiazide (HCTZ) or chlorthalidone (CTD) shows better improvement in central aortic pressure. We conducted an open-label, randomized, prospective cross-over study with an 8-week active treatment (HCTZ of 25 mg with candesartan of 8 mg or CTD of 12.5 mg with candesartan of 8 mg) with a 4-week washout period (only candesartan during this period). Twenty-eight treatment-naïve patients of hypertension were enrolled (mean age: 50±9 years, male: 44.4%). Central aortic pressure, pulse wave velocity (PWV), augmentation index (AIx) and other BP-derived parameters were measured. After 8 weeks of active treatment, there was no significant difference in changes of central aortic pressure between HCTZ and CTD treatments (Δ=-14±8 vs.-16±7 mm Hg, P=0.645). However, CTD treatment showed a significant reduction in PWV compared with baseline (1321±194 vs. 1439±190 cm s-1, P=0.007) and HCTZ treatment (Δ=-118±82 vs. Δ=5±72 cm s-1, P=0.033), whereas HCTZ treatment showed a marginal, but not a significant reduction in AIx compared with baseline. In conclusion, CTD of 12.5 mg is as potent as HCTZ of 25 mg, when combined with candesartan of 8 mg, in lowering central aortic pressure. In addition, CTD treatment resulted in a significant reduction of PWV.

Original languageEnglish
Pages (from-to)79-84
Number of pages6
JournalHypertension Research
Volume36
Issue number1
DOIs
StatePublished - Jan 2013

Keywords

  • central aortic pressure
  • chlorthalidone
  • hydrochlorothiazide
  • thiazide

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