Tiina Lyyra-Laitinen

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BACKGROUND Normal pregnancy is associated with enhanced vasodilatation because of the increased nitric oxide (NO) production. Because L-homoarginine can act as a substrate for NO production, concentrations of L-homoarginine in normal pregnancy were assessed in the present study to test whether L-homoarginine is associated with endothelial function. (More)
We evaluated whether the use of cartilage thickness measurement would improve the ability of the arthroscopic indentation technique to estimate the intrinsic stiffness of articular cartilage. First, cartilage thickness and ultrasound reflection from the surface of bovine humeral head were registered in situ using a high-frequency ultrasound probe.(More)
BACKGROUND The purpose of the present study was to investigate pregnancy-related changes in the maternal serum lipid profile and endothelial function. METHODS AND RESULTS As part of the population-based, prospective cohort Cardiovascular Risk in Young Finns study conducted in Finland, 57 pregnant Finnish women and 62 control women matched for age and(More)
BACKGROUND We evaluated the arrhythmogenic potential of hypoglycemia by studying electrocardiographic (ECG) changes in response to hyperinsulinemic hypoglycemia and associated sympathoadrenal counterregulatory responses in healthy subjects. METHODS The study population consisted of 18 subjects, aged 30-40 years. Five-minute ECG recordings and blood(More)
We investigated the effect of plant stanol esters (STAEST) on serum total and LDL cholesterol concentrations and endothelial function in subjects with type 1 diabetes (T1D). In addition, the changes in the relative serum markers of cholesterol metabolism were recorded. In a parallel, randomized, double-blind study the intervention group (n = 11) consumed(More)
OBJECTIVE The aim of this study was to evaluate changes in the nitric oxide synthase inhibitor asymmetric dimethylarginine (ADMA) levels during different menstrual cycle phases in young adult women with or without oral contraceptive (OC) use. DESIGN AND METHODS The subjects (n=1079) originated from a large population-based, prospective cohort study(More)
We investigated the effects of stanol (STAEST) and sterol esters (STEEST) on endothelial function in hypercholesterolemic subjects. In addition, associations of variables of cholesterol metabolism with endothelial function were investigated. In a double-blind randomized cross-over study (n=39) with age-matched parallel control group (n=37) the subjects(More)
BACKGROUND Our objective was to investigate whether serum concentrations of asymmetric dimethylarginine (ADMA) or l-arginine correlate to hyperlipidemia or endothelial function in normal pregnancy compared with the non-pregnant subjects. METHODS AND RESULTS As a part of population-based, prospective cohort Cardiovascular Risk in Young Finns study(More)
The paper considers the intensity modulated radiation therapy (inverse) treatment planning. An approach to determine the trajectories of the leaves of the multileaf collimator (MLC) in order to produce the prescribed intensity distribution is developed. The paper concentrates on the multiple static delivery technique. A mathematical model for calculating(More)
Clinical audit is a systematic review of the procedures in order to improve the quality and the outcome of patient care, whereby the procedures are examined against agreed standards for good medical RADIOLOGICAL procedures. The criteria of good procedures (i.e. the good practice) are thus the cornerstones for development of clinical audits: these should be(More)