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Sökning: L773:0895 7061

  • Resultat 1-10 av 72
  • [1]234567...8Nästa
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1.
  • Kurland, Lisa, et al. (författare)
  • Aldosterone synthase (CYP11B2) -344 C/T polymorphism is related to antihypertensive response : result from the Swedish Irbesartan Left Ventricular Hypertrophy Investigation versus Atenolol (SILVHIA) trial
  • 2002
  • Ingår i: American Journal of Hypertension. - 0895-7061 .- 1941-7225. ; 15:5, s. 389-93
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: Our aim was to determine whether the aldosterone synthase (CYP11B2) -344 C/T polymorphism was associated with the blood pressure (BP)-lowering response to antihypertensive treatment. METHODS: Patients with mild-to-moderate primary hypertension and left ventricular hypertrophy were randomized in a double-blind study to receive treatment with either the angiotensin II type 1 (AT1) receptor antagonist irbesartan (n = 43), or the beta1-adrenergic receptor blocker atenolol (n = 43). The aldosterone synthase (CYP11B2) -344 C/T polymorphism was analyzed using solid-phase minisequencing and related to BP reduction after 3 months treatment. Serum aldosterone levels were measured. RESULTS: After 3 months treatment the mean reductions in BP were similar for both treatment groups. When assessing the systolic BP reduction in the irbesartan group, patients with the TT variant had a more pronounced reduction (-21 +/- 19 SD mm Hg, n = 17) than both the TC (-14 +/- 18 mm Hg, n= 18) and CC (0 +/- 17 mm Hg, n = 8) genotypes (P = .04). There was no association between this polymorphism and the diastolic BP response. The -344 C/T polymorphism was not associated with the BP response to atenolol. Nor was it related to the baseline serum aldosterone level. CONCLUSIONS: The aldosterone synthase -344 C/T polymorphism was related to the BP-lowering response in hypertensive patients treated with the AT1-receptor antagonist irbesartan.
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2.
  • Lind, Lars, et al. (författare)
  • Vitamin D is related to blood pressure and other cardiovascular risk factors in middle-aged men
  • 1995
  • Ingår i: American Journal of Hypertension. - 0895-7061 .- 1941-7225. ; 8:9, s. 894-901
  • Tidskriftsartikel (refereegranskat)abstract
    • A previous study has shown that serum levels of the active vitamin D metabolite 1,25-(OH)2-vitamin D were inversely related to blood pressure levels while the prohormone 25-OH-vitamin D was found to be related to insulin metabolism. Also other clinical and experimental data support the view that vitamin D metabolism is involved in blood pressure regulation and other metabolic processes. The present study was conducted in order to see if the above mentioned relationships between the vitamin D endocrine system and blood pressure, as well as other cardiovascular risk factors, could be found in a cross-section population-based study. Serum levels of 1,25-(OH)2-vitamin D, 25-OH-vitamin D, and blood pressure were therefore measured in 34 middle-aged men and metabolic cardiovascular risk factors were evaluated by means of intravenous glucose and fat tolerance tests, euglycemic hyperinsulinemic clamp, lipoprotein measurements, and lipoprotein lipase activity determinations. Serum levels of 1,25-(OH)2-vitamin D were found to be inversely correlated to the blood pressure (r = -0.42, P < .02), VLDL triglycerides (r = -0.47, P < .005), and to triglyceride removal at the intravenous fat tolerance test (r = 0.34, P < .05), while serum levels of 25-OH-vitamin D were correlated to fasting insulin (r = -0.35, P < .05), insulin sensitivity during clamp (r = 0.54, P < .001), and lipoprotein lipase activity both in adiposal tissue (r = 0.48, P < .005) and skeletal muscle (r = 0.38, P < .03).(
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  • Hänni, Arvo, et al. (författare)
  • Systolic blood pressure alterations during hyperinsulinemia are related to changes in ionized calcium status
  • 2001
  • Ingår i: American Journal of Hypertension. - 0895-7061 .- 1941-7225. ; 14:11 Pt 1, s. 1106-1111
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: A correlation between changes in ionized calcium status and changes in systolic blood pressure (BP) has previously been observed during induced euglycemic hyperinsulinemia in patients with essential hypertension. The objective of this study was to evaluate associations between alterations in ion status and BP changes during euglycemic hyperinsulinemia in healthy normotensive subjects. METHODS: Ion status in plasma and BP were measured before and at the end of euglycemic hyperinsulinemic clamp tests performed in 41 healthy normotensive volunteers. RESULTS: During euglycemic hyperinsulinemia plasma sodium increased by 1% (P < .0001), ionized calcium (iCa) by 5% (P < .0001), and ionized magnesium (iMg) by 4% (P < .01), whereas potassium decreased by 10% (P < .0001). The changes in plasma iCa and iMg correlated significantly to changes in systolic BP (r = -0.38, P < .02; r = -0.32, P < .05, respectively), but the correlation between changes in iMg and changes in systolic BP did not remain significant in a multiple regression model. The glucose infusion rate correlated inversely to the change in iMg (r = -0.39, P < .01). CONCLUSIONS: The group mean systolic BP was unaltered during induced euglycemic hyperinsulinemia in healthy normotensive subjects; however, a more pronounced increase in the circulating iCa concentration was associated with a greater decline in systolic BP, which is in accordance with previous observations in patients with essential hypertension. The group mean diastolic BP was decreased; however, the lowered diastolic BP was not correlated to changes in ion status.
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6.
  • Hänni, Arvo, et al. (författare)
  • The alterations in insulin sensitivity during angiotensin converting enzyme inhibitor treatment are related to changes in the calcium/magnesium balance
  • 1997
  • Ingår i: American Journal of Hypertension. - 0895-7061 .- 1941-7225. ; 10:2, s. 145-151
  • Tidskriftsartikel (övrigt vetenskapligt)abstract
    • The present analysis was undertaken to investigate the relations between alterations in mineral factors, especially the balance between serum calcium and magnesium concentrations (S-Ca and S-Mg, respectively), and variables reflecting glucose and lipid metabolism during angiotensin converting enzyme (ACE) inhibitor treatment. A total of 96 patients with essential hypertension, participating in four double-blind studies with four different ACE inhibitors and similar protocols, were included. At the end of the initial placebo period and at the end of the period of active drug treatment, a hyperinsulinemic euglycemic clamp test was carried out, lipoprotein status was assessed, and the concentrations of serum electrolytes were measured. The serum ACE activity was determined in the group treated with fosinopril. Changes in insulin sensitivity index (M/I) were directly correlated to alterations in S-Mg (r = 0.24, P < .02), and inversely correlated to changes in S-Ca (r = -0.19, P = .07) and the ratio between serum calcium and magnesium concentrations (Ca/Mg) (r = -0.27, P < .008). The change in total serum triglycerides (S-Tg) was inversely correlated to the change in S-Mg (r = -0.35, P < .0005), and directly correlated to the change in Ca/Mg ratio (r = 0.36, P < .0004). The reduction in serum ACE activity correlated to a more pronounced increase in S-Mg r = -0.62, P < .002), and decrease in the Ca/Mg ratio (r = 0.73, P = .0002). We conclude that the changes in the studied metabolic variables and serum ACE activity during ACE inhibitor treatment are related to alterations in mineral status and the balance between calcium and magnesium concentrations in serum.
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  • Resultat 1-10 av 72
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