Determinants of brachial artery mean 24 h pulse pressure in individuals with Type II diabetes mellitus and untreated mild hypertension

2002 ◽  
Vol 102 (2) ◽  
pp. 177-186 ◽  
Author(s):  
Robert A.J.M. VAN DIJK ◽  
Frans J. VAN ITTERSUM ◽  
Nico WESTERHOF ◽  
Els M. VAN DONGEN ◽  
Otto KAMP ◽  
...  

Brachial artery pulse pressure is a predictor of (cardiovascular) morbidity, but its determinants in individuals with Type II diabetes and untreated mild hypertension have not been elucidated. We therefore cross-sectionally investigated determinants of brachial artery mean 24h pulse pressure in 60 individuals (40 males; age, mean±S.D., 57.8±7.5 years) with Type II diabetes [median diabetes duration (interquartile range), 6.3 (3.6-10.1) years] and untreated mild hypertension [sitting blood pressure >140/90mmHg and <190/120mmHg (mean of two consecutive auscultatory office measurements after 5min of rest)]. We measured (1) three potential determinants reflecting different aspects of central artery stiffness [the overall systemic arterial compliance, the aortic augmentation index and 1/(regional carotido-femoral transit time)], (2) structural and functional changes of the circulatory system often observed in Type II diabetes, and (3) diabetes-associated metabolic variables. After adjustment for age, gender and mean arterial pressure, brachial artery pulse pressure was associated with autonomic function [standardized regression coefficient (β), -0.27 (P = 0.01)], blood pressure decline during sleep [standardized β, -0.32 (P = 0.002)], fasting glucose concentration [standardized β, 0.26 (P = 0.01)], HbA1c concentration [standardized β, 0.27 (P = 0.003)] and diabetes duration [standardized β, 0.28 (P = 0.002)] in linear regression analyses. In a combined multivariate model, brachial artery pulse pressure was independently determined by gender [1 = male, 2 = female; standardized β, 0.24 (P = 0.01)], diabetes duration [standardized β, 0.18 (P = 0.03)], mean arterial pressure [standardized β, 0.32 (P = 0.002)], systemic arterial compliance [standardized β, -0.23 (P = 0.02)] and fasting glucose concentration [standardized β, 0.20 (P = 0.02)]. Aortic augmentation index and 1/(carotido-femoral transit time) were not independently associated with pulse pressure. In conclusion, in individuals with Type II diabetes and untreated mild hypertension, brachial artery pulse pressure is determined mainly by proximal aortic stiffness in a way which is not strongly influenced by peripheral pulse wave reflection. Approx. 60% of the variance in brachial artery pulse pressure could be explained by potentially modifiable determinants.

2002 ◽  
Vol 102 (2) ◽  
pp. 177 ◽  
Author(s):  
Robert A. J. M. van DIJK ◽  
Frans J. van ITTERSUM ◽  
Nico WESTERHOF ◽  
Els M. van DONGEN ◽  
Otto KAMP ◽  
...  

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Sergey N. Tolstov ◽  
Igor A. Salov ◽  
Anton R. Kiselev ◽  
Andrey P. Rebrov

Abstract Introduction Structural and functional changes of the vascular wall in women occur already at the very early stages of reproductive aging. An emergence of applanation tonometry made it possible to evaluate arterial stiffness and central hemodynamic parameters non-invasively, which considerably expanded the information that had been provided previously by invasive methods used for studying these parameters during cardiac catheterization. Whereas a few studies have assessed central aortic pressure (CAP) parameters and reflected pulse wave in women at different phases of their reproductive aging, none investigated the daily profile of CAP and reflected pulse wave parameters in women undergoing different stages of the menopause. Background: assessment of the daily variability in CAP and daily profile of amplification and augmentation of pulse blood pressure (PBP) in women at different menopause phases. Methods The study involved 384 climacteric women. The first group included 168 women undergoing perimenopause, the second group comprised of 216 women in their early postmenopausal stage. A 24-h blood pressure (BP) monitoring in the brachial artery and aorta (BPLab® Vasotens® system, Petr Telegin LLC, Russia) was performed via the measurements of the following indicators: systolic blood pressure (SBP), pulse blood pressure (PBP), central aortic systolic pressure (CASP), central aortic pulse pressure (CAPP), aortic augmentation index (AIxao), and pulse pressure amplification (PPA). Results When investigating PPA values in the brachial artery and aorta, we detected smaller amplification and higher aortic augmentation index at night than in daytime, which reflected a disproportionately higher CAP level during night hours. This pattern was more pronounced in postmenopausal women. We calculated the logistic regression equation (adjusted R2 = 0.49, log-likelihood = − 50.3, chi-square (19) = 97.6, p < 0.001), in which dependent variable was represented by the menopausal status, whereas body mass index with all indicators of a 24-h BP monitoring represented independent variables. In this model, two indicators (body mass index and AIxao) were, independently of each other, associated significantly with the menopause phases. Differences among women at various climacteric phases in terms of remaining indicators of a 24-h BP monitoring, apparently, matched the differences in their body mass index values. Conclusion Rising CAP, in combination with declining PPA and augmenting reflected pulse wave amplitude, may be associated with an increased risk of cardiovascular complications.


2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
A Gurevich ◽  
I Emelyanov ◽  
N Zherdev ◽  
D Chernova ◽  
A Chernov ◽  
...  

Abstract Background The presence of aortic aneurysm can alters pulse wave propagation and reflection, causing changes in central aortic pressure and pulse pressure amplification (PPA) between the aorta and the brachial artery that might be associated with unfavorable hemodynamic effects for the central arteries and the heart. However, the impact of the location of the aneurysm and increase of the aortic diameter on central blood pressure (CBP) is not fully understood. Objective To investigate central aortic pressure and PPA regarding to association with arterial stiffness and aortic diameter in patients with ascending aortic aneurysm (AA), descending thoracic and abdominal aortic aneurysm (TAA and AAA). Methods 122 patients (96 males, 65±11 years) with aortic aneurysm were enrolled before aortic repair. The parameters of the aorta were evaluated by MSCT angiography: 44 patients (30 males, 55±13 years) had AA (the maximum diameter: 59.9±14.2 mm), 13 patients (11 males, 62±11 years) had TAA (the maximum diameter: 62.8±8.0 mm) and 65 patients (54 males, 69±8 years) had AAA (the maximum diameter: 52.3±17.2 mm). Brachial blood pressure (BBP) was measured by OMRON. CBP, augmentation index (AIx), carotid-femoral pulse wave velocity (PWV) were assessed by SphygmoCor. PPA was calculated as a difference between the values of central and brachial pulse pressure (CPP and BPP). Results Patients of the three groups did not differ in BPP (AA: 59.2±17.6; TAA 56.8±12.8; AAA: 59.3±11.4 mm Hg; P=0.5). Intergroup comparison revealed a difference in CPP between the three patients groups: CPP was higher in patients with AA and AAA, lower in patients with TAA (AA: 50.3±16.2; TAA 43.8±10.8; AAA: 50.0±11.2 mm Hg; P=0.05). PPA was lower in patients with AA and AAA than in patients with TAA (9.6±6.7 and 9.3±4.2 vs. 13.0±6.5 mm Hg; P=0.05 and P=0.04, respectively). IAx was higher in patients with AA and AAA than in patients with TAA (25.2±8.1 and 27.6±8.2 vs. 17.2±8.2 mm Hg; P=0.008 and P=0.001, respectively). A decrease of PPA across all patients correlated with an increase of IAx (r = - 0.268; P=0.003). CPP decreased with an increase of the aortic diameter for each level of the aneurysm (AA: r = - 0.460, P=0.016; TAA: r = - 0.833, P=0.003; AAA: r = - 0.275, P=0.05). PWV decreased with the expansion of the maximum aortic diameter at the level of the AA, TAA and AAA: (r = - 0.389, P=0.03; r = - 0.827, P=0.02 and r = - 0.350, P=0.01, respectively). Conclusion In patients with aortic aneurysm measurements of lower central pulse pressure and reduced PWV indicate an association with increased diameter of the aneurysm. An increase in augmentation index, early return of reflected waves, thus smaller PP amplification and higher CPP were identified in patients with ascending and abdominal aortic aneurysm compared by patients with descending thoracic aortic aneurysm. Funding Acknowledgement Type of funding source: None


Circulation ◽  
2007 ◽  
Vol 116 (suppl_16) ◽  
Author(s):  
Catherine L Seck ◽  
Jochen Mueller-Ehmsen ◽  
Gerhard Kreuter ◽  
Karl-Heinz Hauser ◽  
Daniela Braun ◽  
...  

Objective: Cardiovascular risk factors are associated with decreased levels of circulating progenitor cells (CPC). The aim of this study was to determine whether the moderate consumption of red wine leads to an increase of CPCs. Methods: CD34 positive and CD133/CD34 as well as CD117/CD34 double positive cells were measured by FACS analysis in peripheral blood of 15 obese patients suffering from type II diabetes with stable oral drug treatment (67.3 ± 2.3 years, BMI 32.3 ± 0.5 kg/ m 2 ) prior to and after a six week period of drinking two units (300 ml) of red wine (Lemberger Classic, Württemberg, Germany). The drinking period was anticipated by a four week fasting period, in which no alcohol consumption was allowed at all. In addition, brachial artery flow mediated dilatation was determined prior to and after the drinking period. Results: The six week drinking period had no effect on BMI, systolic and diastolic blood pressure, blood glucose levels, HbA1c-values and liver enzymes. There was a non-significant drop in LDL cholesterol, but no change in HDL cholesterol. Concerning CPCs, the following alterations were observed: CD34+ cells increased from 171 ± 22 to 354 ± 28 per million leucocytes. Within the CD34+ cells, the percentage of CD133+ cells increased from 30.8 ± 5.7 % to 53.1 ± 3.3 %, and the percentage of CD117+ cells increased from 38.1 ± 5.8 % to 57.5 ± 4.6 % (p<0.05 for all parameters). Brachial artery flow mediated dilatation increased from 5.57 ± 0.74 % to 11.13 ± 1.34 % (p<0.05) in response to six weeks of red wine consumption. Nitroglycerin mediated brachial artery dilatation increased from 7.45 ± 1.09 % to 11.31 ± 1.09 % (p<0.05). Conclusion: In obese patients suffering from type II diabetes, moderate consumption of red wine leads to a significant improvement of circulating progenitor cell count and endothelial function. No adverse effects of wine consumption on metabolic and cardiovascular parameters were observed.


2021 ◽  
pp. 1-7
Author(s):  
Tércio A.R. Barros ◽  
Wagner L. do Prado ◽  
Thiago R.S. Tenório ◽  
Raphael M. Ritti-Dias ◽  
Antônio H. Germano-Soares ◽  
...  

This study compared the effects of self-selected exercise intensity (SEI) versus predetermined exercise intensity (PEI) on blood pressure (BP) and arterial stiffness in adolescents with obesity. A total of 37 adolescents, 14.7 (1.6) years old, body mass index ≥95th percentile were randomly allocated into SEI (n = 18; 12 boys) or PEI (n = 19; 13 boys). Both groups exercised for 35 minutes on a treadmill, 3 times per week, for 12 weeks. The SEI could set the speed at the beginning of the sessions and make changes every 5 minutes. The PEI adolescents were trained at an intensity set at 60% to 70% of heart rate reserve. Brachial and central BP, pulse pressure, augmentation index, and carotid–femoral pulse wave were determined at baseline and after 12 weeks. Both groups reduced brachial systolic BP (SEI, Δ = −9 mm Hg; PEI, Δ = −4 mm Hg; P < .01), central systolic BP (SEI, Δ = −4 mm Hg; PEI, Δ = −4 mm Hg; P = .01), and central pulse pressure (SEI, Δ = −4 mm Hg; PEI, Δ = −3 mm Hg; P = .02) without differences between groups. No changes in the augmentation index and carotid–femoral pulse wave were observed in either group. The SEI induced similar changes in various cardiovascular outcomes compared with PEI in adolescents with obesity.


Circulation ◽  
2012 ◽  
Vol 125 (suppl_10) ◽  
Author(s):  
Bernhard M Kaess ◽  
Jian Rong ◽  
Martin G Larson ◽  
Naomi M Hamburg ◽  
Joseph A Vita ◽  
...  

Background: Increased vascular stiffness and excessive blood pressure (BP) pulsatility are important risk factors for age-related morbidity. Vascular stiffness and BP pulsatility are related, with a prevailing view that hypertension antedates and contributes to premature vascular aging and a secondary increase in vascular stiffness. However, temporal relations between comprehensive vascular measures and BP elevation have not been fully delineated in a large community-based sample. Methods: We examined longitudinal relations of BP and 3 measures of vascular stiffness and pressure pulsatility derived from arterial tonometry (carotid-femoral pulse wave velocity [CFPWV], forward wave amplitude and augmentation index) over a 7-year period in 1,898 Framingham Offspring participants (mean age 60 yrs, 1,057 women). We also examined relations between measures of microvascular and endothelial function derived from brachial artery Doppler and future progression of BP or vascular stiffness. Results: In multivariable-adjusted regression models, baseline tonometry measures were separately and jointly associated with higher systolic and pulse pressure and incident hypertension ( Table ). Conversely, higher baseline BP was associated with higher forward wave amplitude and augmentation index (all p<0.05) but not CFPWV at follow-up. Higher baseline resting brachial artery flow and lower flow-mediated dilation were associated with incident hypertension in models that included BP and tonometry measures ( Table ). Conclusion: Higher aortic stiffness (CFPWV), pressure pulsatility (forward wave amplitude), and wave reflection (augmentation index) and lower flow-mediated dilation are associated with blood pressure progression and incident hypertension. Our findings support the notion of aortic stiffness as a precursor of hypertension and further suggest a vicious cycle of increasing pressure pulsatility with advancing age. Table. Correlates of incident hypertension. Predictor Variables (baseline) OR 95% CI P Systolic BP 3.24 (2.17; 4.84) <0.0001 Diastolic BP 1.47 (1.13; 1.92) 0.0042 CFPWV 1.30 (1.02; 1.67) 0.037 Forward wave amplitude 1.66 (1.32; 2.09) <0.0001 Augmentation index 1.78 (1.45; 2.17) <0.0001 Brachial artery baseline flow 1.23 (1.05; 1.45) 0.013 Flow-mediated dilation 0.83 (0.70; 0.98) 0.029 Results of a single multivariable model that further adjusted for age,sex, BMI, height and triglycerides in 1,019 participants free of hypertension at baseline who experienced 337 cases of incident hypertension during follow-up. OR expressed per 1 SD of the independent variable.


2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Christian Kuété Fofié ◽  
Elvine Pami Nguelefack-Mbuyo ◽  
Nole Tsabang ◽  
Albert Kamanyi ◽  
Télesphore Benoît Nguelefack

Parts of Ceiba pentandra are wildly used in Africa to treat diabetes and previous works have demonstrated their in vivo antidiabetic effects on type 1 diabetes models. In addition, it has been recently shown that the decoction and the methanol extract from the stem bark of C. pentandra potentiate in vitro, the peripheral glucose consumption by the liver and skeletal muscle slices. But nothing is known about its effect on type II diabetes, especially on insulin resistance condition. We investigated herein the antihyperglycemic, insulin-sensitizing potential, and cardioprotective effects of the dried decoction from the stem bark of Ceiba pentandra (DCP) in dexamethasone-induced insulin resistant rats. DCP phytochemical analysis using LC-MS showed the presence of many compounds, including 8-formyl-7-hydroxy-5-isopropyl-2-methoxy-3-methyl-1,4-naphthaquinone, 2,4,6-trimethoxyphenol, and vavain. Wistar rats were given intramuscularly (i.m.) dexamethasone (1 mg/kg/day) alone or concomitantly with oral doses of DCP (75 or 150 mg/kg/day) or metformin (40 mg/kg/day) for 9 days. Parameters such as body weight, glycemia, oral glucose tolerance, plasma triglycerides and cholesterol, blood pressure, and heart rate were evaluated. Moreover, cardiac, hepatic and aortic antioxidants (reduced glutathione, catalase, and superoxide dismutase), malondialdehyde level, and nitric oxide content were determined. DCP decreased glycemia by up to 34% and corrected the impairment of glucose tolerance induced by dexamethasone but has no significant effect on blood pressure and heart rate. DCP reduced the total plasma cholesterol and triglycerides as compared to animals treated only with dexamethasone. DCP also increased catalase, glutathione, and NO levels impaired by dexamethasone, without any effect on SOD and malondialdehyde. In conclusion, the decoction of the stem bark of Ceiba pentandra has insulin sensitive effects as demonstrated by the improvement of glucose tolerance, oxidative status, and plasma lipid profile. This extract may therefore be a good candidate for the treatment of type II diabetes.


2018 ◽  
Vol 41 (7) ◽  
pp. 378-384 ◽  
Author(s):  
Alper Erdan ◽  
Abdullah Ozkok ◽  
Nadir Alpay ◽  
Vakur Akkaya ◽  
Alaattin Yildiz

Background: Arterial stiffness is a strong predictor of mortality in hemodialysis patients. In this study, we aimed to investigate possible relations of arterial stiffness with volume status determined by bioimpedance analysis and aortic blood pressure parameters. Also, effects of a single hemodialysis session on these parameters were studied. Methods: A total of 75 hemodialysis patients (M/F: 43/32; mean age: 53 ± 17) were enrolled. Carotid-femoral pulse wave velocity, augmentation index, and aortic pulse pressure were measured by applanation tonometry before and after hemodialysis. Extracellular fluid and total body fluid volumes were determined by bioimpedance analysis. Results: Carotid-femoral pulse wave velocity (9.30 ± 3.30 vs 7.59 ± 2.66 m/s, p < 0.001), augmentation index (24.52 ± 9.42 vs 20.28 ± 10.19, p < 0.001), and aortic pulse pressure (38 ± 14 vs 29 ± 8 mmHg, p < 0.001) significantly decreased after hemodialysis. Pre-dialysis carotid-femoral pulse wave velocity was associated with age (r2 = 0.15, p = 0.01), total cholesterol (r2 = 0.06, p = 0.02), peripheral mean blood pressure (r2 = 0.10, p = 0.005), aortic-mean blood pressure (r2 = 0.06, p = 0.02), aortic pulse pressure (r2 = 0.14, p = 0.001), and extracellular fluid/total body fluid (r2 = 0.30, p < 0.0001). Pre-dialysis augmentation index was associated with total cholesterol (r2 = 0.06, p = 0,02), aortic-mean blood pressure (r2 = 0.16, p < 0.001), and aortic pulse pressure (r2 = 0.22, p < 0.001). Δcarotid-femoral pulse wave velocity was associated with Δaortic-mean blood pressure (r2 = 0.06, p = 0.02) and inversely correlated with baseline carotid-femoral pulse wave velocity (r2 = 0.29, p < 0.001). Pre-dialysis Δaugmentation index was significantly associated with Δaortic-mean blood pressure (r2 = 0.09, p = 0.009) and Δaortic pulse pressure (r2 = 0.06, p = 0.03) and inversely associated with baseline augmentation index (r2 = 0.14, p = 0.001). In multiple linear regression analysis (adjusted R2 = 0.46, p < 0.001) to determine the factors predicting Log carotid-femoral pulse wave velocity, extracellular fluid/total body fluid and peripheral mean blood pressure significantly predicted Log carotid-femoral pulse wave velocity (p = 0.001 and p = 0.006, respectively). Conclusion: Carotid-femoral pulse wave velocity, augmentation index, and aortic pulse pressure significantly decreased after hemodialysis. Arterial stiffness was associated with both peripheral and aortic blood pressure. Furthermore, reduction in arterial stiffness parameters was related to reduction in aortic blood pressure. Pre-dialysis carotid-femoral pulse wave velocity was associated with volume status determined by bioimpedance analysis. Volume control may improve not only the aortic blood pressure measurements but also arterial stiffness in hemodialysis patients.


QJM ◽  
2020 ◽  
Vol 113 (Supplement_1) ◽  
Author(s):  
S F Ewida ◽  
A M H Shabaan ◽  
H F Eldomiaty ◽  
G S Y Hanna ◽  
S E Hassabelnabi ◽  
...  

Abstract Background Cardiovascular disease is the most life-threatening diabetic complication. Type II diabetes may lead to damage of the heart muscle. Sodium glucose cotransporter 2 (SGL2) inhibitors are a new class of diabetic medications indicated only for the treatment of type II diabetes. Aim This investigation was assigned to compare the effect of metformin and SGL2 inhibitors (dapaglifilizone) in type II diabetic rats. Design and methods: Eighty rats divided into four groups were used: non diabetic; diabetic; diabetic metformin -treated; diabetic dapagliflizoline- treated. At the end, arterial blood pressure and cardiac performance (cardiac contractility and heart rate) were assessed. Serum glucose, glycosylated hemoglobin (HbA1c), insulin, lipid profile, total antioxidant capacity, malondialdehyde, tumor necrosis factor α were measured. HOMA-IR index was calculated. DNA changes were assessed from hearts and aortea. Aortic endothelial changes recorded using H&E and masson trichome techniques. Results Glycemic index, lipid profile, oxidative stress and inflammatory parameters were significantly improved in both metformin and dapagliflizoline treated groups with also significant improvement in blood pressure, Cardiac performance and reduction in collagen deposition in aortic tissue and DNA fragmentation. Dapagliflizoline treatment results were significantly improved in all parameters compared to metformin treatment. Conclusion SGL2 inhibitors (dapaglifilizone) successfully restored glycemic state, cardiac performance, DNA and endothelial changes in type II diabetic rats compared to metformin.


Diabetologia ◽  
2002 ◽  
Vol 45 (3) ◽  
pp. 420-426 ◽  
Author(s):  
G. F. Watts ◽  
D. A. Playford ◽  
K. D. Croft ◽  
N. C. Ward ◽  
T. A. Mori ◽  
...  

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