Itsuki Nagata

Fukuoka University, Hukuoka, Fukuoka, Japan

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Publications (6)12.48 Total impact

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    ABSTRACT: Objective: We analyzed the efficacy and safety of combination therapy of high-dose losartan (100 mg/day) and hydrochlorothiazide (HCTZ, 12.5 mg/day) compared with those of the combination of high-dose telmisartan (80 mg/day) and HCTZ (12.5 mg/day). Methods: Forty hypertensive patients who received a combination of high-dose telmisartan and HCTZ were enrolled. We applied a changeover strategy with switching from a combination of high-dose telmisartan and HCTZ to high-dose losartan and HCTZ. We divided the patients into two groups; those who achieved the target blood pressure (controlled group) and those who did not reach the target blood pressure (uncontrolled group) before the changeover and performed further analysis. Results: The uncontrolled group showed a significant decrease in systolic blood pressure (SBP) (143±12 mmHg to 126±11 mmHg at three months). In addition, serum uric acid significantly decreased in all subjects, and in each of the controlled and uncontrolled groups. There were no significant changes in other biochemical parameters, such as potassium and hemoglobin A1c, at three months after the changeover in all subjects. Conclusion: Combination therapy with high-dose losartan and HCTZ was superior to the combination of telmisartan and HCTZ with respect to significant decreases in systolic blood pressure and serum uric acid in hypertensive patients.
    Preview · Article · Aug 2014 · Journal of Renin-Angiotensin-Aldosterone System

  • No preview · Article · Aug 2014 · Atherosclerosis
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    ABSTRACT: Background: It is well known that percutaneous coronary intervention (PCI) in hemodialysis (HD) patients is associated with higher rates of in-stent restenosis and major adverse cardiovascular events (MACE) compared to that in non-HD patients, even if the target value in cholesterol management is achieved. Methods: To evaluate the factors that are associated with MACE in HD patients, we selected 142 HD patients (164 lesions) without acute coronary syndrome (ACS) from 2148 patients (2568 lesions) who underwent PCI in our database of the FU-Registry [UMIN000005679, Fukuoka University Hospital EC/IRB:10-1-08(09-105)], and compared 52 patients (53 lesions) with MACE [MACE(+)] to 90 patients (111 lesions) without MACE [MACE(-)]. Results: Total cholesterol (TC: 150±30mg/dL vs 166±39mg/dL, p<0.05) and high-density lipoprotein cholesterol (HDL-C: 40.1±14.7mg/dL vs 47.8±13.5mg/dL, p<0.01) levels were significantly lower in the MACE(+) group at follow-up. No significant differences were observed in other parameters, including triglyceride, low-density lipoprotein cholesterol (LDL-C; LDL-C/HDL-C ratio, and % changes in HDL-C, non-HDL-C, LDL-C), and hemoglobin A1c (US National Glycohemoglobin Standardization Program) between before and after PCI. TC, LDL-C, and non-HDL-C at the time of PCI and TC, and HDL-C at the 9-month follow-up were negatively correlated with MACE, while body mass index (BMI) [odds ratio (OR): 0.81; 95% confidence interval (CI): 0.68-0.95)], prior coronary artery bypass graft (CABG) (OR: 3.89; 95%CI: 1.29-12.6), and insulin use (OR: 3.17; 95%CI: 1.23-8.55) were strongly correlated with MACE in a multivariate analysis. Conclusion: BMI, CABG, and insulin use, but not LDL-C, are independent predictors of MACE in HD patients, suggesting that the application of lipid management for non-HD patients to HD patients at the time of PCI may not necessarily be beneficial for medium-term clinical outcomes.
    No preview · Article · Jul 2014 · Journal of Cardiology
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    ABSTRACT: Objective: Although combination therapy with angiotensin II type 1 receptor blockers (ARBs) and calcium channel blockers (CCBs) is recommended for patients with hypertension, little is known about which single-pill fixed-dose combinations of ARBs/CCBs are useful. Therefore, we directly compared the efficacy and safety of 2 single-pill combinations: olmesartan/azelnidipine (Olm/Az) and valsartan/amlodipine (Val/Am). Methods: Hypertensive patients who received either olmesartan (20 mg/day) and amlodipine (5 mg/day) or valsartan (80 mg/day) and azelnidipine (16 mg/day) were enrolled. We randomly divided 42 patients into Olm/Az and Val/Am groups and analyzed office blood pressure (BP), pulse rate (PR), and biochemical parameters before and after treatment for 16 weeks. Results: There were no differences in the patient characteristics at baseline between the groups. The time course of changes in systolic BP/diastolic BP was also similar. In addition, there were no differences in PR or biochemical parameters between baseline and 16 weeks or between the groups. Since there were no differences in changes in BP between the groups, we performed an additional 12-week follow-up (17-28 weeks as an extended stage). Visit-to-visit variability in SBP in the Olm/Az group was significantly decreased in the extended stage compared to before changeover to a single pill, although there were no differences in BP between the groups. Conclusion: The two single-pill fixed-dose combinations of ARBs/CCBs were similar with regard to efficacy and safety.
    No preview · Article · Jan 2014
  • Itsuki Nagata · Yuhei Shiga · Shin-Ichiro Miura · Keijiro Saku

    No preview · Article · Feb 2013 · Internal Medicine
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    ABSTRACT: Many patients still have high blood pressure (BP) after treatment with high-dose angiotensin II type 1 receptor blockers (ARBs) or Preminent® (medium-dose of losartan (50 mg/day)/hydrochlorothiazide (HCTZ) (12.5 mg/day)). Therefore, we analyzed whether Micombi®BP (high-dose telmisartan (80 mg/day)/HCTZ (12.5 mg/day)) could provide better results with regard to efficacy and safety for patients with uncontrolled hypertension. In total, 44 hypertensive patients (22 males, age 71±14 years) who showed uncontrolled BP despite the use of high-dose ARBs or Preminent® were enrolled in this study. We used a changeover design in which the patients were switched from high-dose ARBs or Preminent® to Micombi®BP. We analyzed BP, heart rate (HR), and biochemical parameters before and after treatment for 3 months. Systolic BP and diastolic BP significantly decreased (125±15/69±11 mmHg) and 85% of the patients achieved their target BP at 3 months after changeover. Patients who switched from ARBs and those who switched from Preminent® showed similar BP-lowering effects. In addition, the reductions in BP after 3 months in patients with or without chronic kidney disease and in those with or without metabolic syndrome (MetS) were also similar. There were no significant changes in HR during the study period. Although blood levels of potassium, hemoglobin A1c and uric acid (UA) significantly increased after 3 months for all of the patients, none of the patients showed serious adverse effects. High-dose telmisartan/HCTZ therapy was associated with a significant reduction in BP and helped patients achieve their target BP.
    Full-text · Article · Mar 2012 · Journal of Renin-Angiotensin-Aldosterone System