Search results for " Function"
showing 10 items of 9395 documents
Does the level of serum antimüllerian hormone predict ovulatory function in women with polycystic ovary syndrome with aging?
2012
Abstract OBJECTIVE: To determine possible prediction of regular menses with aging in anovulatory women with polycystic ovary syndrome (PCOS). DESIGN: Cohort. SETTING: Academic practice. PATIENT(S): A total of 54 anovulatory women with PCOS and 28 age- and weight-matched control subjects. INTERVENTION(S): Blood and ovarian ultrasound at baseline and after 5 years. MAJOR OUTCOME MEASURE(S): Serum antimüllerian hormone (AMH), gonadotropins, androgens, insulin sensitivity, and ovarian ultrasound. RESULT(S): After 5 years, there was a significant decrease in AMH in women with PCOS and control subjects (10 of 54 anovulatory women became ovulatory after 5 years). There was a significant negative c…
Disposition of azapropazone in chronic renal and hepatic failure.
1981
The disposition of azapropazone 600 mg i.v. was investigated in 6 healthy subjects, 13 patients with cirrhosis and 8 patients with renal failure. In healthy subjects the elimination half-life was 12.2±2.1 h (mean ± SD), the volume of distribution 10.6±3.31 and the total clearance was 597±135 ml·h−1. Renal clearance accounted for about 62% of the total clearance. The free fraction of azapropazone in the plasma was 0.0045±0.0006. The patients with cirrhosis were divided into Group I with modest and Group II with severe impairment of liver function. In Group I the total clearance of azapropazone was not significantly different from that in healthy subjects. There was a 2.5-fold increase in its…
Amplitude, Latency, and Peak Velocity in Accommodation and Disaccommodation Dynamics
2017
The aim of this work was to ascertain whether there are differences in amplitude, latency, and peak velocity of accommodation and disaccommodation responses when different analysis strategies are used to compute them, such as fitting different functions to the responses or for smoothing them prior to computing the parameters. Accommodation and disaccommodation responses from four subjects to pulse changes in demand were recorded by means of aberrometry. Three different strategies were followed to analyze such responses: fitting an exponential function to the experimental data; fitting a Boltzmann sigmoid function to the data; and smoothing the data. Amplitude, latency, and peak velocity of …
A New Evaluation of Emergency Methods for Artificial Ventilation
1968
SUMMARY The effect of artificial ventilation by the exhaled-air methods (mouth-to-nose and mouth-to-mouth) and chest-pressure-arm-lift methods (Ho-ward-Thomsen, Silvester-Brosch, Holger Nielsen) was investigated in 11 anaesthetised apnoeic volunteers. The efficiency of these methods was assessed by the changes in arterial PO2, O2 saturation, PCO2 and pH. It could be shown that the exhaled-air methods ensured normal PO2 and O2 saturation in all cases, while the ventilation by the manual methods was insufficient. Even though normal oxygenation was achieved by the manual methods in some cases, others were extremely hypoventilated, with critically low O2 tensions. pH and CO2 tensions did not ch…
Influence of digoxin on sinus node function after pharmacologic autonomic blockade.
1983
The effect of iv digoxin on normal sinus node function was studied after pharmacologic autonomic blockade (AB) in ten patients. Sinus cycle length (SCL), sinus node recovery time (SNRT) and sinoatrial conduction time (SACT) were determined before and after AB with propranolol (0.2 mg/kg body weight) and atropine sulfate (0.04 mg/kg body weight) iv, and 15 min, 30 min, and 45 min after 1 mg iv digoxin. AB resulted in a significant decrease (P less than 0.01) in SCL (916 +/- 158 to 716 +/- 120 ms), in SNRT (1,229 +/- 221 to 871 +/- 190 ms), and in SACT (79 +/- 34 to 44 +/- 10 ms). Fifteen minutes after iv digoxin there was no significant change observed in SCL (716 +/- 120 to 708 +/- 92 ms), …
Long-term graft function of adult rat and human islets encapsulated in novel alginate-based microcapsules after transplantation in immunocompetent di…
2005
We describe the results of the first study to show that adult rat and human islets can be protected against xenogenic rejection in immunocompetent diabetic mice by encapsulating them in a novel alginate-based microcapsule system with no additional permselective membrane. Nonencapsulated islets lost function within 4–8 days after being transplanted into diabetic Balb/c mice, whereas transplanted encapsulated adult rat or human islets resulted in normoglycemia for >7 months. When rat islet grafts were removed 10 and 36 weeks after transplantation, the mice became immediately hyperglycemic, thus demonstrating the efficacy of the encapsulated islets. The explanted capsules showed only a …
Effects of hypocaloric diets with different glycemic indexes on endothelial function and glycemic variability in overweight and in obese adult patien…
2013
Background & aims: The role of glycemic index of the diet in glucose control and cardiovascular prevention is still not clear. The aim of this study was to determine the effects of hypocaloric diets with different glycemic indexes and glycemic loads on endothelial function and glycemic variability in nondiabetic participants at increased cardiovascular risk. Methods: Forty nondiabetic obese participants were randomly assigned to a three-month treatment with either a low glycemic index (LGI; n ¼ 19) or high glycemic index (HGI; n ¼ 21) hypocaloric diet with similar macronutrient and fiber content. Endothelial function was measured as flow-mediated dilatation (FMD) of the brachial artery befo…
Acute effects of coffee on endothelial function in healthy subjects
2010
Background/Objectives: Coffee is the most widely consumed beverage in the world, but its effect on the cardiovascular system has not been fully understood. Coffee contains caffeine and antioxidants, which may influence endothelial function, both of which have not yet been investigated. The objective of this study was to investigate the acute effects of coffee on endothelial function measured by brachial artery flow-mediated dilation (FMD). Subjects/Methods: A total of 20 (10 males and 10 females) healthy non-obese subjects underwent a double-blind, crossover study. Subjects ingested one cup of caffeinated (CC) and one cup of decaffeinated (DC) Italian espresso coffee in random order at 5- t…
Hemostatic function in young subjects with central obesity: relationship with left ventricular function.
1995
This study was designed to evaluate coagulation and fibrinolysis activity and their relationship with left ventricular function in young obese subjects with central fat distribution. We assessed coagulation and fibrinolysis activity by evaluation of factor VII activity, fibrinogen and plasminogen, plasminogen activator inhibitor (PAI), and tissue plasminogen activator antigen basally (tPA1) and after venous occlusion (tPA2). These measures were evaluated in young (< 40 years) obese subjects with central fat distribution (n = 19) and in comparable lean subjects (n = 20). Blood glucose, triglycerides, total and high-density lipoprotein (HDL) cholesterol, apolipoprotein (apo) A1 and apo B, fas…
In renal transplanted patients inflammation and oxidative stress are interrelated.
2006
Introduction: The inflammatory state plays a well-documented role to cause oxidative stress, especially in end-stage renal disease (ESRD) patients, wherein several cardiovascular risk factors are amplified by the coexistence of a microinflammatory state with increased oxidative stress. Methods: We measured serum concentrations of high sensitivity C-reactive protein (CRP), tumor necrosis factor α (TNFα), 8-iso-prostaglandin F2α (8-iso-PGF2α-in vivo oxidative stress marker) in 15 chronic renal failure (CRF) and 15 transplant patients versus 15 healthy controls. Exclusion criteria were: age 65 years as well as a diagnosis of diabetes or cardiovascular diseases. We evaluated systolic (SBP) and …