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Biomedical subjects

Elmo Mannarino

Publications and source records attributed to Elmo Mannarino.

At least 37 records · Page 2Linked to original sources

Usefulness of brain natriuretic peptide levels to discriminate patients with stable angina pectoris without and with electrocardiographic myocardial ischemia and patients with healed myocardial infarction.

Brain natriuretic peptide (BNP) levels were measured in 100 patients with coronary heart disease (CHD) who underwent myocardial stress thallium-201 single-photon emission computed tomography (30 with stable angina without basal electrocardiographic ischemia and no perfusion defects, 31 with angina with electrocardiographic ischemia and reversible perfusion defects, and 39 with myocardial infarction and irreversible defects) and in 42 controls. BNP levels progressively increased in patients with CHD and were significantly greater in patients with ischemia (p <0.01) and infarction (p <0.001) compared with controls and subjects with angina. BNP concentration was correlated positively (r = 0.923, p <0.001) with perfusion defect extent and inversely (r = -0.690, p <0.001) with the left ventricle ejection fraction (not different in the subjects examined).

Analysis of Variance↗

Relevance of homocysteine on brachial flow-mediated vasodilatation and carotid and femoral intima-media thickness in patients with hypercholesterolemia.

The relevance of homocysteine to brachial flow-mediated vasodilatation and carotid and femoral intima-media thickness was investigated in 192 patients with hypercholesterolemia. Low-density lipoprotein cholesterol and homocysteine levels predicted brachial flow-mediated vasodilatation, internal carotid mean intima-media thickness, and intima-media thickening at all femoral sites. Homocysteine levels seem to be an additional factor in the initial atherosclerotic damage of patients with hypercholesterolemia.

Brachial Artery↗

CD4+CD28- T lymphocytes contribute to early atherosclerotic damage in rheumatoid arthritis patients.

BACKGROUND: Peripheral blood expansion of an unusual CD4+ T-cell subset lacking surface CD28 has been suggested to predispose rheumatoid arthritis (RA) patients to develop more aggressive disease. However, the potential association between CD4+CD28null T cells and early atherosclerotic changes in RA has never been investigated. METHODS AND RESULTS: The number of circulating CD4+CD28null cells was evaluated in 87 RA and 33 control subjects who also underwent evaluation of carotid artery intima-media thickness (IMT) and endothelial function via flow-mediated vasodilation (FMV). Patients had higher IMT and lower FMV compared with control subjects. The frequency of CD4+CD28null cells was significantly higher in patients than in control subjects. Twenty patients with persistent expansion of circulating CD4+CD28null cells had more marked increase of carotid artery IMT and stronger decrease of brachial artery FMV. Blockade of tumor necrosis factor-alpha led to a partial reappearance of the CD28 molecule on the CD4+ cell surface. CONCLUSIONS: Circulating CD4+CD28(null) lymphocytes are increased in RA. Patients with persistent CD4+CD28null cell expansion show preclinical atherosclerotic changes, including arterial endothelial dysfunction and carotid artery wall thickening, more significantly than patients without expansion. These findings suggest a contribution of this cell subset in atheroma development in RA. Moreover, the demonstration that tumor necrosis factor-alpha blockade is able to reverse, at least in part, the CD28 deficiency on the CD4+ cell surface may be of interest for possible innovative therapeutic strategies in cardiovascular diseases.

Aged↗

Prognostic value of the metabolic syndrome in essential hypertension.

OBJECTIVES: We sought to determine the prognostic significance of the metabolic syndrome in hypertension. BACKGROUND: Increased cardiovascular risk in hypertensive patients might be partially attributable to metabolic disturbances. METHODS: We prospectively followed for up to 10.5 years (mean 4.1 years) a total of 1742 hypertensive patients without cardiovascular disease (55% men; blood pressure [BP] 154/95 mm Hg; age 50 +/- 12 years). A modified National Cholesterol Education Program definition for metabolic syndrome was used, with body mass index in place of waist circumference. RESULTS: During follow-up, 162 patients developed cardiovascular events (2.28 events/100 patient-years). Event rates in the groups with one to five characteristics of the metabolic syndrome were 1.54, 1.96, 2.97, 3.35, and 5.27 per 100 patient-years, respectively (p < 0.001). A total of 593 patients (34%) had the metabolic syndrome. Patients with the syndrome had an almost double cardiovascular event rate than those without (3.23 vs. 1.76 per 100 patient-years, p < 0.001). After adjustment for age, gender, total cholesterol, creatinine, smoking, left ventricular hypertrophy, and 24-h systolic BP, the risk of developing cardiovascular events was still higher in patients with the metabolic syndrome (hazard ratio [HR] 1.73, 95% confidence interval [CI] 1.25 to 2.38). The syndrome was an independent predictor of both cardiac and cerebrovascular events (HRs 1.48 and 2.11, respectively). The adverse prognostic value of the metabolic syndrome was attenuated but still significant among the 1637 patients without diabetes (HR 1.43, 95% CI 1.02 to 2.08). CONCLUSIONS: In hypertensive subjects, the metabolic syndrome amplifies cardiovascular risk associated with high BP, independent of the effect of several traditional cardiovascular risk factors.

Adult↗

Familial HDL deficiency due to ABCA1 gene mutations with or without other genetic lipoprotein disorders.

Mutations in ABCA1 have been shown to be the cause of Tangier disease (TD) and some forms of familial hypoalphalipoproteinemia (HA), two genetic disorders characterized by low plasma HDL levels. Here we report six subjects with low HDL, carrying seven ABCA1 mutations, six of which are previously unreported. Two mutations (R557X and H160FsX173) were predicted to generate short truncated proteins; two mutations (E284K and Y482C) were located in the first extracellular loop and two (R1901S and Q2196H) in the C-terminal cytoplasmic domain of ABCA1. Two subjects found to be compound heterozygotes for ABCA1 mutations did not have overt clinical manifestations of TD. Three subjects, all with premature coronary artery disease (pCAD), had a combination of genetic defects. Besides being heterozygotes for ABCA1 mutations, two of them were also carriers of the R3500Q substitution in apolipoprotein B and the third was a carrier of N291S substitution in lipoprotein lipase. By extending family studies we identified 17 heterozygotes for ABCA1 mutations. Plasma HDL-C and Apo A-I values in these subjects were 38.3 and 36.9% lower than in unaffected family members and similar to the values found in heterozygotes for Apo A-I gene mutations which prevent Apo A-I synthesis. This survey underlines the allelic heterogeneity of ABCA1 mutations and suggests that: (i) TD subjects, if asymptomatic, may be overlooked and (ii) there may be a selection bias in genotyping towards carriers of ABCA1 mutations who have pCAD possibly related to a combination of genetic and environmental cardiovascular risk factors.

ATP Binding Cassette Transporter 1↗

Simvastatin increases bone mineral density in hypercholesterolemic postmenopausal women.

Statins are able to reduce cardiovascular morbility and mortality mainly through their hypocholesterolemic effect. Beyond the inhibition of cholesterol synthesis, the identification of "ancillary" mechanisms has motivated studies evaluating the relationship between the use of statins and the modification of bone mineral density (BMD). To date, clinical trials have provided discordant results. The aim of our study was to evaluate whether simvastatin treatment (40 mg/d) could modify BMD in hypercholesterolemic women (n = 40) after a 2-year treatment as compared with a control group treated only with diet (n = 20) and matched by gender, age, body mass index (BMI), lipids, menopausal age, and BMD and the number of osteopenic, osteoporotic, and normal women (on the basis of T-score value). Exclusion criteria were secondary hyperlipemias and osteoporosis and current or previous therapy with statins, bisphosphonates, and estrogens. The BMD was measured at the lumbar spine and hip by dual energy x-ray absorpiometry (DEXA). In the group treated by simvastatin, BMD, both on the spine and femoral hip, showed a significant increase after 8 and 24 months, respectively (0.878 +/- 0.133 v 0.893 +/- 0.130 and 0.907 +/- 0.132; 0.840 +/- 0.101 v 0.854 +/- 0.101; and 0.863 +/- 0.10, P <.001); there was a percentage increase of 1.7% after 8 months and 3.3% after 24 months at the spine; at the femoral hip, BMD increased 1.6% after 8 months and 2.7% after 24 months. The group treated only with hypolipidic diet demonstrated after 8 and 24 months a slight decrease in BMD both on the spine and femoral hip (respectively, 0.884 +/- 0.175 v 0.872 +/- 0.174 and 0.861 +/- 0.164; 0.860 +/- 0.110 v 0.853 +/- 0.096 and 0.847 +/- 0.095; P <.05). In conclusion, as partly suggested by retrospective or observational data, this longitudinal study indicates that simvastatin treatment exerts a beneficial effect on BMD.

Absorptiometry, Photon↗

Prognostic significance of isolated, non-specific left ventricular repolarization abnormalities in hypertension.

OBJECTIVE: Clinicians are often confronted with the incidental finding of isolated minor, non-specific repolarization changes on the electrocardiogram (ECG) in hypertensive patients. The aim of this study was to investigate the prognostic significance of such changes. DESIGN: Prospective, observational study. METHODS: A total of 1970 hypertensive patients without prevalent cardiovascular disease were followed for up to 9.1 years (mean 4.7 years). Patients with ECG abnormalities including ischaemia, previous infarction, bundle branch block, atrial fibrillation and ventricular pre-excitation were excluded. Patients were divided into three groups: normal left ventricular (LV) repolarization (n = 1355); minor repolarization changes (n = 504); and typical LV strain (n = 111). RESULTS: During follow-up, 78 patients developed new-onset ischaemic heart disease. The event rates were 0.50, 1.28 and 3.08 per 100 patient-years in the groups with normal repolarization, minor changes, and typical LV strain, respectively (P < 0.001). After adjustment for the effect of age, sex, diabetes, serum cholesterol, smoking, LV hypertrophy and 24-h pulse pressure, the risk for developing coronary events was higher in patients with minor repolarization changes (hazard ratio 2.07, 95% confidence interval 1.23-3.47; P < 0.01) or LV strain (hazard ratio 4.00, 95% confidence interval 2.09-7.65; P < 0.001) than in patients with normal repolarization (reference category). Population-attributable risks were 21 and 14%, respectively. Minor ST-T changes also retained an adverse prognostic value among patients without LV hypertrophy (hazard ratio 1.90, 95% confidence interval 1.08-3.33; P = 0.026). CONCLUSION: We have identified minor, non-specific LV repolarization changes as a novel, independent risk factor for ischaemic heart disease in patients with uncomplicated hypertension.

Adult↗

Attenuation of inflammation with short-term dietary intervention is associated with a reduction of arterial stiffness in subjects with hypercholesterolaemia.

BACKGROUND: Increased arterial stiffness has been found in patients with chronic high-grade inflammatory diseases. Whether mitigation of low-grade systemic inflammation, through a low-cholesterol/low-saturated fat diet, may have a role in improving arterial stiffness is still untested. DESIGN: We investigated whether variations in blood lipids and plasma C-reactive protein induced by low-cholesterol/low-saturated fat diet are associated with variations in large-artery stiffness in hypercholesterolaemia. METHODS: Thirty-five patients with primary hypercholesterolaemia and 15 normal control subjects were recruited for the study. Hypercholesterolaemic patients followed an 8-week low-cholesterol/low-saturated fat diet (30% total fat, 5% saturated fat, cholesterol <200 mg/daily). Anthropometric characteristics, blood lipids, plasma C-reactive protein and arterial stiffness were measured at baseline and after the diet. RESULTS: Arterial stiffness and C-reactive protein levels were higher in hypercholesterolaemic patients than in controls. Significant reductions in body weight (2 kg, 3%), plasma total cholesterol (13.4 mg/dl, 5.3%), low-density lipoprotein cholesterol (11.2 mg/dl, 6.4%), C-reactive protein (0.7 mg/l, 39%) and arterial stiffness (from 8.9+/-2.0 to 8.1+/-1.9 m/s, 11%) were achieved among hypercholesterolaemic patients after the 8-week diet (P<0.05 for all). Bivariate correlations and multivariate analysis showed reduction in arterial stiffness after short-term diet to be associated with reduction of plasma C-reactive protein levels (r=0.59, beta=0.38, P<0.05 for both). CONCLUSIONS: Short-term low-cholesterol/low-saturated fat diet in hypercholesterolaemia may be effective in improving large artery stiffness, likely through the mitigation of low-grade systemic inflammation.

Arteries↗

Mechanisms of high-density lipoprotein cholesterol effects on the endothelial function in hyperlipemia.

High-density lipoprotein-cholesterol (HDL-c) has a favorable influence on the endothelial function, but the mechanisms of this protective action are not fully understood. We studied lipid parameters, soluble adhesion molecules (vascular cell adhesion molecule-1 [VCAM-1], intercellular adhesion molecule [ICAM-1], E-selectin) oxidized low-density lipoproteins (LDL), and brachial-artery flow-mediated vasodilation (FMV) in 184 hyperlipemic patients (90 men, age 54 +/- 10 years, waist/hip circumference ratio 0.89 +/- 0.07, LDL-cholesterol [LDL-c] 4.9 +/- 1.3 mmol/L, triglycerides 1.8 +/- 0.9 mmol/L, HDL-c 1.3 +/- 0.5 mmol/L) after excluding those with current smoking, diabetes, hypertension, and vascular diseases. Patients were divided into 2 groups on the basis of HDL-c levels: < 1.03 mmol/L (n = 53) v >or= 1.03 mmol/L (n = 131). Patients with low HDL-c showed significantly lower LDL-c (P <.05), higher triglycerides (P <.001), higher body mass index (P <.02), lower FMV (3.7% +/- 2.0% v 4.9% +/- 3.4%, P <.002), higher VCAM-1 (1,195 +/- 395 ng/mL v 984 +/- 303 ng/mL, P <.01), and higher ICAM-1 (406 +/- 78 ng/mL v 364 +/- 68 ng/mL, P <.01). E-selectin and oxidized LDL showed no significant differences. In a multivariate age, oxidized LDL and brachial artery diameter predicted a lower FMV, while HDL-c was an independent predictor of a greater FMV (P =.003). Increasing levels of VCAM-1 and ICAM-1 were predicted by lower HDL-c, while higher oxidized LDL predicted higher VCAM-1 (P <.05). Our data suggest that in hyperlipemic subjects free of cardiovascular disease low HDL-c negatively modulates endothelial function through a lack of oxidation inhibition and a concomitant overexpression of adhesion molecules.

Adult↗

Effect of body weight changes on 24-hour blood pressure and left ventricular mass in hypertension: a 4-year follow-up.

BACKGROUND: Few data are available on the long-term effects of weight loss on 24-h blood pressure (BP) and left ventricular mass in overweight hypertensive patients. METHODS: A total of 181 never-treated overweight hypertensive subjects (body mass index, 25 to 39 kg/m(2), office BP 145/94 +/- 12/7 mm Hg) had 24-h BP monitoring and echocardiography twice, at baseline and after 3.8 +/- 2 years (minimum 1 year). None of the subjects received antihypertensive drugs during the follow-up. Main outcome measures were changes in 24-h BP and in left ventricular mass. RESULTS: Percent change in body weight had a direct relationship with 24-h BP changes (r = 0.35 and 0.31 for systolic and diastolic BP, respectively; both P <.001). The associations with office BP changes (r = 0.13, P =.10 for systolic BP; r = 0.15, P =.06 for diastolic BP) were significantly weaker (both P <.01, z test). The patients who lost weight during follow-up (n = 106) had a significantly lower increase in 24-h BP (+0.6 +/- 9/ +0.2 +/- 6 v +4.9 +/- 9/ +2.7 +/- 7 mm Hg for systolic/diastolic BP, both P <.01) and in left ventricular mass (-3 +/- 30 g v +9 +/- 32 g, P <.02) than the remaining subjects. In a multiple linear regression, a 10% weight loss independently predicted a 4.3/3.8 mm Hg decrease in 24-h systolic/diastolic BP. CONCLUSIONS: Long-term weight loss determines a sustained BP reduction during the 24 h and a decrease in left ventricular mass in overweight hypertensive subjects. The relation of weight loss with ambulatory BP changes is closer than that with office BP.

Adult↗

Early vascular damage in primary hypoalphalipoproteinemia.

The relationship between hypoalphalipoproteinemia (hypoalpha), a metabolic disorder characterized by reduced high-density lipoprotein (HDL) cholesterol levels, and atherosclerotic disease is not completely understood. We investigated arterial functional and structural changes in 19 subjects with hypoalpha (HDL cholesterol < or = 0.7 mmol/L for men and < or = 0.8 mmol/L for women; 13 men; 47 +/- 7 years) and in 21 healthy control subjects (11 men; 46 +/- 13 years). Brachial-artery flow-mediated vasodilation (FMV) and intima-media thickness (IMT) of the carotid and femoral arteries were determined in all subjects. FMV was significantly lower in hypoalpha than in controls (5.6% +/- 4.3% v 8.2% +/- 2.7%; P <.05). IMT was greater in hypoalpha than in controls at both the internal carotid (0.83 +/- 0.1 mm v 0.69 +/- 0.1 mm) and superficial femoral level (0.83 +/- 0.2 mm v 0.68 +/- 0.1 mm; both P <.05). FMV had a positive correlation with HDL cholesterol (r =.42, P =.06) and a negative one with triglycerides (r = -0.38, P =.01). An inverse relationship was found between HDL cholesterol and internal carotid and superficial femoral IMT (r = -0.64 and r = -0.60, respectively; P <.01 for both) and a positive one between triglycerides and internal carotid and superficial femoral IMT (r =.53 and r =.47, P <.05). In a multivariate regression analysis, brachial FMV was predicted by HDL cholesterol and brachial diameter (beta =.42 and -0.43, respectively; both P <.05). HDL cholesterol was the only significant predictor of internal carotid and superficial femoral IMT (beta = -0.45 and -0.49, respectively; both P <.05). In conclusion, subjects with primary hypoalpha, without overt cardiovascular disease, are characterized by an impaired endothelial function and by an increase in large-artery IMT.

Adult↗

Plasma C-reactive protein in subjects with hypo/hyperalphalipoproteinemias.

Hypoalphalipoproteinemia (Hypo-A), a lipid disorder characterized by low high-density lipoprotein (HDL)-cholesterol (HDL-C) levels, is frequently associated with an increased risk of suffering future coronary heart disease (CHD). Conversely, hyperalphalipoproteinemia (Hyper-A) is a characterized by high HDL-C concentrations and is possibly associated with longevity and protection against CHD. Whether plasma C-reactive protein (CRP) level, an emerging marker of CHD risk, may be influenced by either extremely low or high HDL-C concentrations is yet to be determined. Plasma levels of lipids and CRP have been measured in 52 middle-aged men and women, clinically free of CHD, including 20 subjects with Hypo-A, 12 with Hyper-A, and 20 healthy normolipemic age-matched controls. CRP levels were the highest in Hypo-A [0.22 mg/dL (interquartile range, 0.15 to 0.44)], the lowest in Hyper-A [0.03 mg/dL (0.02 to 0.07)], and intermediate in the control group [0.10 mg/dL (0.05 to 0.20)]. Differences in plasma CRP concentrations were significant between Hypo-A and the other 2 groups, as well as between Hyper-A and controls. Plasma CRP levels showed a particularly strong correlation with plasma HDL-C concentrations (r = -.66, P <.001). In multivariate models, HDL-C represented the only significant predictor of circulating levels of CRP. In conclusion, in subjects with Hypo-A or Hyper-A, HDL-C levels may account for plasma CRP variations independent of other potential cardiovascular risk factors.

Adult↗

Increased C-reactive protein concentrations in never-treated hypertension: the role of systolic and pulse pressures.

OBJECTIVE: To test whether the plasma concentration of C-reactive protein (CRP), a sensitive marker of systemic inflammation, is increased in patients with newly diagnosed, never-treated hypertension and whether blood pressure and its pulsatile component, pulse pressure, are correlated with plasma CRP concentration independently of a consistent number of cardiovascular risk factors. DESIGN: Cross-sectional study in a hospital outpatient hypertension clinic. METHODS: A total of 135 newly diagnosed, never-treated patients with hypertension and 40 healthy matched non-hypertensive controls underwent office and 24-h blood pressure measurement and blood sampling for determination of plasma CRP and serum lipid concentrations. RESULTS: Plasma CRP concentration was greater in hypertensive individuals (1.85 mg/l, interquartile range 0.74-3.64) than in control individuals (1.01 mg/l, interquartile range 0.67-1.88; P = 0.02). In the entire population, CRP had a significant direct association with office systolic blood pressure and pulse pressure, but not with diastolic blood pressure. Among hypertensive patients, plasma CRP was related to 24-h systolic blood pressure (r = 0.28, P < 0.01) and pulse pressure (r = 0.32, P < 0.01), but not to diastolic blood pressure (r = 0.12, P > 0.2). CRP was also directly associated with body mass index (r = 0.25, P < 0.01), serum low-density lipoprotein cholesterol (r = 0.21, P = 0.03) and serum triglycerides (r = 0.21, P = 0.03). In the multivariate analysis, systolic blood pressure and pulse pressure, but not diastolic blood pressure, were significant predictors of plasma CRP concentration when a consistent number of cardiovascular risk factors was controlled for simultaneously. CONCLUSIONS: Systolic blood pressure and pulse pressure, but not diastolic blood pressure, are predictors of plasma C-reactive protein concentrations in patients with newly diagnosed, never-treated hypertension, irrespective of the potential proinflammatory action of traditional cardiovascular risk factors.

Adult↗

Capillary rarefaction and abnormal cardiovascular reactivity in hypertension.

OBJECTIVE: To determine the effects of capillary rarefaction on cardiovascular reactivity and microcirculatory functioning in essential hypertension. DESIGN: Hypertension is associated with abnormal cardiovascular reactivity and increased vasoconstriction. Capillary rarefaction amplifies these abnormalities, which modify microcirculatory hemodynamics. Hence this study of the hemorheological pattern and the veno-arteriolar reflex in hypertensive patients and normotensive control subjects. METHODS: Sixty-one men with never-treated essential hypertension and capillary rarefaction (< 80 capillaries per field) and 20 age-matched and sex-matched controls underwent a strenuous cycle ergometer test to monitor, during exercise and recovery, the blood pressure profile and the hemorheological pattern: blood viscosity at low shear, hematocrit and leukocyte counts, soluble P-selectin levels, and red and white blood cell filterability rates. The veno-arteriolar reflex was determined by laser-Doppler flowmetry before exercise and at recovery.RESULTS Hypertensive men with < or = 72 capillaries per field had an abnormal hemorheological profile before exercise. The physiological response to exercise was observed only in the controls and in hypertensives with > or = 73 capillaries per field. Abnormal responses to exercise worsened as capillaries were more rarefied. At recovery, hemorheological parameters in hypertensives with 65-72 capillaries per field returned to baseline, remaining significantly (P < 0.05) different to control values. Variations in the hemorheological pattern in hypertensives with < 64 capillary per field persisted at recovery. The veno-arteriolar reflex followed the same pattern. CONCLUSION: A reduced microvascular network may contribute to abnormal cardiovascular reactivity and to exercise-induced rheological abnormalities in hypertension.

Adult↗

Prostaglandin E1 improves endothelial function in critical limb ischemia.

Prostaglandin E1 (PGE1) may relieve rest pain and heal ulcers in critical limb ischemia, but its mechanism of action is still incompletely understood. To investigate the effects of PGE1 treatment on endothelial function evaluated as brachial artery flow-mediated vasodilation (FMV) and on soluble adhesion molecule plasma levels (vascular adhesion molecule-1 [sVCAM-1] and intercellular adhesion molecule-1 [sICAM-1]), 12 patients with critical limb ischemia were treated with daily PGE IV infusion (alprostadil 60 microg) for 2 weeks. FMV and plasma sICAM-1 and sVCAM-1 concentrations were determined at baseline, after the first infusion, and after 1 and 2 weeks. Compared with 30 healthy control subjects, patients had higher baseline sVCAM-1 (2.402 +/- 296 ng/ml vs 972 +/- 117 ng/ml) and sICAM-1 levels (464 +/- 51 ng/ml vs 206 +/- 37 ng/ml, both p < 0.05) and lower FMV (1.0 +/- 1.1% vs 5.6 +/- 1.6%, p < 0.05). sICAM-1 concentration progressively decreased with treatment (from 464 +/- 51 ng/ml to 326 +/- 56 ng/ml, 288 +/- 42 ng/ml, and 279 +/- 44 ng/ml after the first dose and, respectively, after 1 and 2 weeks; all p < 0.05). sVCAM-1 showed a reduction after 2 weeks (from 2.402 +/- 296 ng/ml to 1.916 +/- 176 ng/ml; p < 0.05). FMV improved after 1 and 2 weeks (from 1.0 +/- 1.1% to 3.1 +/- 0.6% and 5.2 +/- 2.1%, both p < 0.05). In conclusion, treatment with PGE1 determines a significant improvement in endothelial function in patients with critical limb ischemia.

Aged↗