R Kaaja

Helsinki University Central Hospital, Helsinki, Province of Southern Finland, Finland

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Publications (68)163.37 Total impact

  • Article: Fertility in people with childhood-onset type 1 diabetes.
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    ABSTRACT: AIMS/HYPOTHESIS: To assess the number of live births in a population-based, retrospective cohort of women and men with childhood-onset type 1 diabetes, and matched controls. METHODS: The reproductive histories of people in a Finnish cohort of 2,307 women and 2,819 men with type 1 diabetes and two matched controls (for each case) were obtained from National Population Register data. All persons with diabetes were diagnosed with the disease in 1965-1979 at the age of 17 or under. A proportional hazards model was used to model the association between the rate of live births as a function of the age of an individual and the observed covariates (sex and age at onset of diabetes). RESULTS: Both women and men with diabetes had a smaller number of live births than the controls; the HR of having a first child for diabetic women compared with controls was 0.66 (95% CI 0.62, 0.71) and for men was 0.77 (95% CI 0.72, 0.83). In women, a birth cohort effect was detected; in more recent birth cohorts, the difference between diabetic women and controls as regards having children was significantly smaller than in earlier cohorts. Later age at onset of diabetes was associated with a higher rate of having a first child among men (p = 0.04) and having a second live birth among women (p = 0.002). CONCLUSIONS/INTERPRETATION: Type 1 diabetes affects the number of live births in both women and men. The age at onset of diabetes is associated with the pattern of reproduction in both diabetic women and men.
    Diabetologia 09/2012; · 6.81 Impact Factor
  • Article: The effect of hysterectomy or levonorgestrel-releasing intrauterine system on cardiovascular disease risk factors in menorrhagia patients: a 10-year follow-up of a randomised trial.
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    ABSTRACT: To compare, whether women with menorrhagia, treated with either hysterectomy or LNG-IUS, differ in their cardiovascular risk profile during 10-year follow-up. A total of 236 women were randomized to treatment by hysterectomy (n=117) or LNG-IUS (n=119). Their cardiovascular risk factors were analyzed at baseline, at 5 years, and at 10 years. As 55 originally randomized to the LNG-IUS group had hysterectomy during the follow-up, all analyzes were performed by actual treatment modality. Waist circumference, body-mass index (BMI), blood pressure, and the levels of blood lipids, serum high-sensitivity CRP (hsCRP) and tumor necrosis factor alpha (TNF-α) were measured, and the use of medication for hypertension, diabetes, hypercholesterolemia, and ischemic heart disease was analyzed. After 5 years, an increase in the use of diabetes medication during the follow-up was only detected in the hysterectomy group (from 1.7% to 6.7%, P=0.008 vs from 5.1% to 8.4%, P=0.08), as well as they had significantly higher serum levels of TNF-α (108.59 pg/ml vs 49.02 pg/ml, P=0.001) and hsCRP (1.55 μg/ml vs 0.78 μg/ml, P=0.038) at 5- and 10-years. There was no difference between the groups in the use of cardiovascular medication, neither was there difference in blood pressure, waist circumference, BMI, or concentrations of blood lipids. Hysterectomy seems to be associated with increased levels of serum inflammatory markers and increased diabetes medication, which in turn, may predispose individual to future cardiovascular events.
    Maturitas 06/2011; 69(4):354-8. · 2.77 Impact Factor
  • Article: Decreased variation of inflammatory markers in gestational diabetes.
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    ABSTRACT: Gestational diabetes is a prediabetic state. Sub-clinical inflammation may play a role in the transition from gestational diabetes to type 2 diabetes; the role of the autonomic nervous system as a mediating system has been raised. We aimed to study the association of the sympathetic nervous system and sub-clinical inflammation in women with gestational diabetes. We studied 41 Caucasian women with gestational diabetes and 22 healthy pregnant and 14 non-pregnant controls. We assayed plasma noradrenaline, insulin, C-reactive protein, interleukin-6, insulin growth factor-1, serum amyloid A, steroid hormone-binding globulin, α-1 acid glycoprotein and cortisol at 2400, 0400 and 0700 h. No differences existed in the concentrations of inflammatory markers between gestational diabetes and normal pregnancy but women with gestational diabetes showed loss of variation in C-reactive protein and serum amyloid A. Levels of hormone-binding globulin were lower in hypertensive compared with normotensive women with gestational diabetes at all time points and lowest at midnight when α-1 acid glycoprotein levels were higher in hypertensive women. Gestational diabetes is associated with loss of natural variation of C-reactive protein and serum amyloid A, suggesting altered modulation of inflammation. Hypertension in gestational diabetes seems not to be associated with higher levels of inflammatory markers other than α-1 acid glycoprotein.
    Diabetes/Metabolism Research and Reviews 01/2011; 27(3):269-76. · 3.37 Impact Factor
  • Article: Factor V Leiden as a risk factor for preterm birth--a population-based nested case-control study.
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    ABSTRACT: Preterm birth is a major cause of neonatal morbidity and mortality, occurring in 5-13% of deliveries in developed countries. Genetic thrombophilia can theoretically contribute to the induction of preterm delivery, but the role of thrombophilia as risk factor is unclear. To assess factor V Leiden, FII G20210A and other selected inherited and acquired variables as risk factors for preterm birth. We performed a population-based nested case-control study of 100,000 consecutive pregnancies in Finland. Cases and controls were identified by combining national registers. Clinical data were obtained from medical records and standardized questionnaires. We studied 324 cases with preterm delivery at or after 22 and before 37 completed weeks of gestation, and 752 controls. FV Leiden was associated with a 2.4-fold risk (95% confidence interval [CI] 1.3-4.6) of preterm birth in all pregnancies, and a 2.6-fold risk (95% CI 1.4-5.1) in singleton pregnancies. FV Leiden was especially associated with late preterm birth at or after 32 weeks of pregnancy, with an odds ratio (OR) of 2.9 (95% CI 1.5-5.6) in all pregnancies and an OR of 3.1 (95% CI 1.6-6.2) in singleton pregnancies. FII G20210A was not associated with preterm birth. Twin pregnancy (OR 12.0, 95% CI 6.0-24.1) and a history of venous thrombosis (OR 3.8, 95% CI 1.4-9.8) were associated with increased risk. High educational level and modest overweight (body mass index 25-29.9 kg m(-2) ) had protective effects. Maternal carriage of FV Leiden was associated with increased risk of late but not early preterm birth. FII G20120A was not associated with preterm birth.
    Journal of Thrombosis and Haemostasis 10/2010; 9(1):71-8. · 5.73 Impact Factor
  • Article: Imbalance of the autonomic nervous system at night in women with gestational diabetes.
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    ABSTRACT: Autonomic nervous system dysfunction is observed in Type 2 diabetes. As gestational diabetes is a potent risk factor of later Type 2 diabetes, we set out to determine whether autonomic nervous system imbalance could already be observed in women with this condition. Because activity of the sympathetic nervous system tends to be relatively stable in the nocturnal hours, we performed the study at night. We studied 41 women with gestational diabetes, 22 healthy pregnant controls and 14 non-pregnant controls. We assayed plasma noradrenaline at 24.00, 04.00 and 07.00 h and performed an overnight Holter recording for heart rate variability analysis. In addition, we assayed plasma adrenomedullin, a cardiovascular protective hormone. Compared with non-pregnant controls, plasma noradrenaline levels were increased at 04.00 and 07.00 h in the gestational diabetic (P = 0.003) and pregnant control (P = 0.002) groups, with no difference between them. Heart rate variability, very-low-frequency and low-frequency power were lower in pregnant groups compared to the non-pregnant controls. Heart rate variability remained unchanged between specified sampling times in the gestational diabetic group, in contrast to fluctuation seen in the control groups. Gestational diabetes, compared with normal pregnancy, seems not to be a state of overall sympathetic nervous system activation. At the heart level, however, an inhibitory effect on autonomic nervous system modulation was seen. Plasma noradrenaline and heart rate variability correlated well, supporting the use of this function in future studies of overall sympathetic activity during pregnancy.
    Diabetic Medicine 09/2010; 27(9):988-94. · 2.90 Impact Factor
  • Article: Pre-eclampsia is a risk factor of carotid artery atherosclerosis.
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    ABSTRACT: A history of pre-eclampsia has been shown to be associated with an increased risk of subsequent coronary artery disease. The intima-media thickness of carotid arteries and the detection of plaques are useful measures as regards preclinical atherosclerosis. The aim of this study was to examine whether women with a history of pre-eclampsia more often show signs of atherosclerosis compared with 2 control groups. We used data from a large Finnish cross-sectional health examination survey. We had women with previous pre-eclampsia (n = 35) or pregnancy-induced hypertension (n = 61) and 2 control groups. Laboratory tests and physical examination were performed. Information on reproductive and medical history was obtained at the home interview. Carotid atherosclerosis was assessed by ultrasonography. The women with previous pre-eclampsia had significantly (p = 0.008) more atherosclerotic plaques than the healthy parous controls. The intima-media thickness in the women with previous pre-eclampsia also tended to be higher than in the other groups, although the differences did not reach statistical significance. In logistic regression analysis, advanced age (OR: 1.08; 95% CI: 1.04-1.13; p < 0.001) and pre-eclampsia (OR: 3.63; 95% CI: 1.50-8.79; p = 0.004) were independent risk factors as regards plaque, and in linear regression analysis advanced age (estimate: 0.012; 95% CI: 0.010-0.014; p < 0.001), HDL cholesterol (estimate: -0.049; 95% CI: -0.088 to -0.010; p = 0.013), systolic blood pressure, BMI (estimate: 0.005; 95% CI: 0.000-0.009; p = 0.043) and high-sensitivity C-reactive protein (estimate: -0.003; 95% CI: -0.007 to -0.000; p = 0.048) were independent risk factors with respect to intima-media thickness. Our data suggest that pre-eclampsia is an independent risk factor as regards developing plaque later in life.
    Cerebrovascular Diseases 04/2009; 27(6):599-607. · 2.72 Impact Factor
  • Article: Oral health care patterns and the history of miscarriage.
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    ABSTRACT: Oral infections can trigger the production of pro-inflammatory mediators that may be risk factors for miscarriage. We investigated whether oral health care patterns that may promote or alleviate oral inflammation were associated with the history of miscarriage in 328 all-Caucasian women. Of 328 women in this cross-sectional cohort, 74 had history of miscarriage (HMC). Medical, dental and sociodemographic data were collected through clinical examinations, medical record searches and structured questionnaires. The multivariate regression analyses indicated that urgency-based dental treatment demonstrated a significant association [odds ratio (OR) = 2.54; 95% confidence interval (CI): 1.21-5.37; P = 0.01] and preventive dental treatment demonstrated a marginally significant inverse association (OR = 0.53; CI: 0.26-1.06; P = 0.07) with HMC. Self-rated poor oral health had a non-significant positive association with HMC (OR 1.60; CI: 0.88-2.90). Our results provide sufficient evidence for hypothesis generation to test whether other precise measures of oral inflammation are associated with adverse birth outcomes.
    Oral Diseases 12/2008; 14(8):734-40. · 2.49 Impact Factor
  • Article: Predictors and risk factors of pre-eclampsia.
    R Kaaja
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    ABSTRACT: Understanding the mechanisms of disease responsible for the syndrome of pre-eclampsia (PE) as well as early risk assessment is still a major challenge. Risk factors for PE are nulliparity, a family or own history of PE, pre-existing diabetes or increased body mass index, multiple pregnancy, maternal age, renal disease, hypertension or raised blood pressure at booking and chronic autoimmune disease. Other factors are thrombophilias and insulin resistance together with obesity. On the other hand identification of predictors of the development of pre-eclampsia would enhance the ability to diagnose women likely to develop pre-eclampsia before the onset of the disease and would improve their monitoring and enable to convey them to randomized trials for evaluating prophylactic treatment. A number of biochemical agents have been assessed as markers for predicting pre-eclampsia. None of them has been proved to be of clinical value yet. Much effort has been put into evaluating novel potential markers and their combination with other screening methods such as Doppler sonography. The most promising biochemical markers, to date, are placenta protein 13 (PP-13) as well as soluble fms-like tyrosine kinase-1 (sFlt-1) and soluble endoglin (sEng). These markers allow screening at a relatively early stage and, most importantly, show relatively high predictive values and improved diagnostic performance if combined with first trimester Doppler sonography. However, until now, too little data are available to justify the clinical use of these markers. Large-scale prospective studies, assessing these markers, are important to advance progress in reducing maternal and perinatal morbidity and relieving the heavy burden of pre-eclampsia.
    Minerva ginecologica 11/2008; 60(5):421-9.
  • Article: Effects of sympatholytic therapy on insulin sensitivity indices in hypertensive postmenopausal women.
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    ABSTRACT: Cardiovascular risk factors are often ineffectively controlled in hypertensive postmenopausal women, and moreover, some antihypertensive drugs may increase particular risk factors such as insulin resistance. In a multicenter, multinational (Finland, Sweden, Lithuania), double-blind, prospectively randomized study hypertensive obese postmenopausal women without hormone therapy (n = 98) were randomly assigned to receive treatment with either the centrally acting agent moxonidine, 0.6 mg/day, or with the peripherally acting atenolol, 50 mg/day, for 8 weeks. In addition to blood pressure measurements, insulin sensitivity was estimated by the quantitative insulin sensitivity check index (QUICKI) and by the insulin sensitivity index (ISI-Matsuda). Subgroup analysis in insulin-resistant women (fasting P-insulin > or = 10 mU/l) and blood pressure responders (diastolic blood pressure < or = 90 mmHg and/or reduction of blood pressure > or = 10 mmHg) were also carried out. Both atenolol and moxonidine led to a significant reduction in diastolic blood pressure of 9.5 mmHg and 6.2 mmHg, respectively. Among insulin-resistant women, an increase in the insulin sensitivity assessed by ISI was improved with moxonidine treatment (p = 0.025). A decrease in insulin sensitivity assessed by QUICKI was observed with atenolol treatment in women with fasting insulin level < 10 mU/l. In patients, in whom blood pressure was reduced, an improvement in insulin sensitivity (ISI) was associated with moxonidine treatment (p = 0.019), but not with atenolol treatment. The centrally acting sympatholytic agent moxonidine did reduce blood pressure somewhat less than atenolol, but it was associated with an improved metabolic profile in terms of decreased insulin resistance both in insulin-resistant postmenopausal women and in women with a significant blood pressure response.
    International journal of clinical pharmacology and therapeutics 07/2007; 45(7):394-401. · 1.18 Impact Factor
  • Article: Variations in the thrombomodulin and endothelial protein C receptor genes in couples with recurrent miscarriage.
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    ABSTRACT: Recurrent miscarriage (RM) has been suggested to be caused by mutations in genes coding for various coagulation factors resulting in thrombophilia. Mouse models indicate that genes involved in the protein C anticoagulant pathway are essential for normal embryonic development. Loss of function of two of these genes, thrombomodulin (TM) and endothelial protein C receptor (EPCR), causes embryonic lethality in mice. The aim of this study was to determine whether variations in the human TM or EPCR genes are associated with an increased risk for RM. Forty-six RM patients and 191 controls were screened for mutations in TM and EPCR using denaturing high-performance liquid chromatography (DHPLC). The partners of 40 RM patients were also screened. One exonic and one intronic variation in TM and two exonic and two intronic sequences in EPCR were detected. Four variants were common in both patients and controls. A previously identified truncating mutation in EPCR, suggested to have a role in pregnancy complications, was identified in two patients and one control. A novel deletion in the 3'UTR region of TM was detected, but its significance remains unsolved. These data suggest that mutations in the TM or EPCR genes are not a major cause of RM, although they may exert a modifier effect in combination with other variants.
    Human Reproduction 04/2007; 22(3):864-8. · 4.47 Impact Factor
  • Article: Pre-eclampsia but not pregnancy-induced hypertension is a risk factor for diabetic nephropathy in type 1 diabetic women.
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    ABSTRACT: Our aim was to study whether pre-eclampsia and pregnancy-induced hypertension are predictors of diabetic nephropathy in type 1 diabetic women. A total of 203 type 1 diabetic women, who were pregnant between 1988 and 1996 and followed at the Department of Obstetrics and Gynaecology in Helsinki, were re-assessed after an average of 11 years within the nationwide, multi-centre Finnish Diabetic Nephropathy Study. Diabetic nephropathy was defined as microalbuminuria, macroalbuminuria or end-stage renal disease. Patients with prior pre-eclampsia had diabetic nephropathy more often than patients with a normotensive pregnancy (diabetic nephropathy vs normal albumin excretion rate: 41.9% vs 8.9%; p<0.001), whereas patients with a history of pregnancy-induced hypertension did not (10.3% vs 8.9%; p=0.81). CHD was more prevalent in patients with a history of pre-eclampsia than in patients with a normotensive pregnancy (12.2% vs. 2.2%; p=0.03). Pre-eclampsia (odds ratio [OR] 7.7, 95% CI 1.6-36.1; p=0.01) and HbA(1c) (OR 2.0, 95% CI 1.1-3.8; p<0.05) were associated with incident diabetic nephropathy even when adjusted for follow-up time, BMI, smoking, diabetes duration and age. These data suggest that a history of pre-eclamptic pregnancy but not pregnancy-induced hypertension is associated with an elevated risk of diabetic nephropathy.
    Diabetologia 03/2007; 50(3):516-22. · 6.81 Impact Factor
  • Article: Peripartum cardiomyopathy.
    R Kaaja
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    ABSTRACT: Peripartum cardiomyopathy (PPCM) is a rare cardiac disorder of unknown cause that occurs in pregnant females, most commonly in the early postpartum period. It shares many clinical characteristics with idiopathic dilated cardiomyopathy but occurs at a younger age and is associated with a better prognosis. The etiology and pathogenic mechanisms have been difficult to study, however current hypotheses include infectious, immunologic, nutritional, and iatrogenic causes. Diagnosis is based upon the clinical presentation of congestive heart failure and objective evidence of left ventricular systolic dysfunction. Mortality rates over the past 10 years in PPCM have decreased, most likely due to advances in medical therapy for heart failure and use of implantable defibrillators. For those patients, who remain refractory to conventional pharmacologic therapy, cardiac transplantation and mechanical circulatory support are viable options. In less than 50% of PPCM patients, left ventricular function normalizes with pharmacologic therapy. However, subsequent pregnancies are often associated with recurrence of left ventricular systolic dysfunction.
    Minerva cardioangiologica 07/2006; 54(3):331-6.
  • Article: Oral health in women with pregnancy and delivery complications.
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    ABSTRACT: Oral health was retrospectively studied in 207 women (mean age 30 years) in the Helsinki Womens' Hospital with the hypothesis that women with pregnancy complications and/or delivery complications would present poorer dental status than women without complications. Computerized dental records of the City of Helsinki Health Department were used with decayed, missing, filled index (DMF) and community periodontal index (CPI) scoring systems and a summary dental health index (DHI) was constructed for statistics. In 72%, the delivery was uncomplicated, while 18% had Caesarean section. Of the women, 8% had gestational diabetes, 7.1% had gestational hypertension, and 1.8% had preeclampsia. Fifteen (6.6%) preterm babies were born; eight (3.5%) babies weighed <2.500 g, seven (3.2%) received a 1-min Apgar point <7 indicating less than satisfactory state of the newborn. DMF was 12.9+/-6.6 in women without complications compared to 15.3+/-6.7 in women with complications (n.s.). CPI values did not differ between the groups. The mean DHI values were 2.07 in women with normal pregnancy complications and no delivery complications, 2.23 in those with pregnancy complications, and 2.13 in those with delivery complications, respectively. In logistic regression analysis, no oral health parameters associated with any complications. Thus, this study failed to show an association between poor dental health and pregnancy or delivery complications.
    Clinical Oral Investigations 06/2006; 10(2):96-101. · 2.36 Impact Factor
  • Article: Pregnancy-associated recurrent liver necrosis in patient with antiphospholipid syndrome.
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    ABSTRACT: The presence of antiphospholipid antibodies is associated with thromboembolic events, thrombocytopenia and numerous pregnancy complications such as recurrent miscarriage, preeclampsia and HELLP syndrome. This condition is known as the antiphospholipid syndrome (APS). We describe a rare case of recurrent liver necrosis postpartum in two consecutive pregnancies of woman with systemic lupus erythematosus (SLE) and positive antiphospholipid antibodies (aPL) who underwent complete recovery.
    Lupus 02/2006; 15(12):889-91. · 2.34 Impact Factor
  • Article: Inflammatory markers and retinopathy in pregnancies complicated with type I diabetes.
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    ABSTRACT: The relation of maternal cytokine levels to retinopathy progression during diabetic pregnancy is a less studied subject. Therefore, we investigated levels of systemic proinflammatory markers, C-reactive peptide (CRP), interleukin-6 (IL-6) and circulating vascular cell adhesion molecule-1 (VCAM-1) during pregnancy and postpartum in relation to the progression of diabetic retinopathy (DR). A prospective follow-up study of 39 pregnant women with Type I diabetes and eight nondiabetic pregnant women was performed. DR was graded from fundus photographs. Plasma levels of systemic proinflammatory markers were measured by immunofluorometric assay (CRP) and by enzyme-linked immunosorbent assay (IL-6 and VCAM-1) in the first, second (diabetics only), third trimester of pregnancy, and 3 and 6 months postpartum (diabetics only). Our diabetic women had good glycaemic control (HbA1c 6.9 +/- 0.8). The levels of IL-6, VCAM-1, and CRP did not differ between diabetic and nondiabetic women throughout pregnancy and postpartum (repeated measures ANOVA between the groups). An association between CRP and progression of retinopathy was observed in diabetic women (P = 0.037). Additional evidence of inter-relationship could be revealed as CRP was higher in those diabetic women with worse glycaemic control (HbA1c) (P = 0.038). During pregnancy and postpartum, levels of proinflammatory factors (IL-6, CRP, VCAM-1) seem to be generally similar in Type I diabetic women compared to nondiabetic controls. However, CRP levels were higher in those diabetic women with progression of retinopathy and in those with worse glycaemic control.
    Eye 05/2005; 19(4):422-30. · 1.85 Impact Factor
  • Article: Diurnal blood glucose profiles in women with gestational diabetes with or without hypertension.
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    ABSTRACT: The aim of the study was to establish whether diurnal blood glucose profiles differed in women with gestational diabetes (GDM) with different forms of hypertensive complications. The subjects were patients diagnosed at 26-32 gestational weeks as having GDM (n = 178). They were classified as being normotensive, having chronic hypertension (with or without superimposed pre-eclampsia on chronic hypertension) or pregnancy-induced hypertension (with or without proteinuria). We compared diurnal blood glucose profiles (blood glucose taken every 4 h over 24 h) in these three groups. Hypertension complicated 43% of the women with GDM. The glucose profiles were similar between the three groups, except that in early morning hours (from 04:00 to 08:00 h) blood glucose concentrations increased in mothers with chronic hypertension, whereas they decreased in the normotensive women. In univariate regression analysis, both obesity (BMI > or = 28 kg/m(2)) and chronic hypertension showed significant association with blood glucose rise from 04:00 to 08:00 h, but in a multiple regression model neither showed significant independent effect. The rise in blood glucose levels during the early morning hours in women with GDM and chronic hypertension could reflect greater insulin resistance and sympathetic overactivity.
    Diabetic Medicine 12/2004; 21(11):1181-4. · 2.90 Impact Factor
  • Article: Plasma exchange in severe postpartum HELLP syndrome.
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    ABSTRACT: We present a case of extremely severe postpartum HELLP (hemolysis, elevated liver enzymes, low platelets) syndrome, associated with activation of coagulation, massive recurrent intra-abdominal bleeding requiring two laparotomies, renal failure, and central nervous system symptoms. This case underlines the complexity of pregnancy-related thrombotic microangiopathies regarding their differential diagnosis, multiple organ dysfunction, as well as management. Systemic endothelial cell injury plays a central role in the pathogenesis of thrombotic microangiopathies. Treatment of HELLP syndrome usually consists of administration of antihypertensive therapy and magnesium sulfate. No consensus exists regarding the use of plasma exchange or corticosteroids. Plasma exchange was a major part of the treatment regime in our patient. Early plasma exchange may be considered as an adjuvant therapy in severe and progressive postpartum HELLP syndrome.
    Acta Anaesthesiologica Scandinavica 10/2002; 46(8):955-8. · 2.19 Impact Factor
  • Article: Increased thromboxane production in women with a history of venous thromboembolic event: effect of heparins.
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    ABSTRACT: We investigated the production of prostacyclin and thromboxane in pregnant women with a previous venous thromboembolic event before, during and after the use of unfractionated heparin and low molecular weight heparin (dalteparin). Twenty women were studied before starting heparin prophylaxis (before 20 weeks of gestation), during heparin prophylaxis (at 30 weeks of gestation) and after heparin prophylaxis (16 weeks after delivery). Ten pregnant women with no history of thromboembolism were studied as the control group. Urinary output of the stable metabolite of prostacyclin (2,3-dinor-6-keto-PGF1alpha) and that of thromboxane A2 (2,3-dinor-TxB2), as well as a number of markers of thrombophilia were measured and expressed as mean (+/-SEM). Women with a history of thromboembolism were characterized by normal prostacyclin production but elevated thromboxane production (44.0 +/- 4.1 versus 19.0 +/- 3.6 ng/mmol creatinine, P < 0.001) at 12 weeks of pregnancy. Heparin prophylaxis (regardless of the type) had abolished elevated thromboxane concentrations at 30 weeks of gestation. Four months after delivery, thromboxane dominance had returned (25.2 +/- 3.5 versus 13.6 +/- 2.1 ng/mmol creatinine, P < 0.01). The presence of hereditary thrombophilia (9/20) was not associated with any changes in prostanoid concentrations. Thus, women with a history of venous thromboembolic events have thromboxane dominance during and after pregnancy, but this dominance can be eliminated through the use of heparins.
    British Journal of Haematology 09/2001; 114(3):655-9. · 4.94 Impact Factor
  • Article: Reduced pain tolerance during and after pregnancy in women suffering from fear of labor.
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    ABSTRACT: Pain tolerance in women suffering and not suffering from fear of labor during and after pregnancy were compared. Twenty women with labor fear and 20 control women were subjected to a cold pressor test (CPT) on average 1 month before delivery and 9 months later. Half the volunteers were nulliparous and half parous. Pain endurance time (PET) and intensity of pain (Visual Analogue Scale, VAS) during CPT was assessed. Patients in the fear group tolerated CPT for a significantly shorter time than did women without fear both in pregnancy (154.8+/-109.9 s vs. 282.5+/-60.1 s (mean+/-SD), P<0.001), and in the postpartum period (128.6+/-111.7 s vs. 279.6 +/-60.3 s, P=0.002). Those with labor fear experienced CPT as significantly more painful than did the controls both during pregnancy (VAS 6.68+/-1.9 vs. 3.78+/-2.0 (mean+/-SD), P<0.001) and after (VAS 7.73+/-1.5 vs. 5.92+/-3.0, P=0.04). PET and VAS values correlated during pregnancy (r=-0.62, P<0.001), but not after pregnancy (r=-0.30, not significant). Parity was not associated with either PET or VAS scores. As a rule, pain in all women during CPT was regarded to be lower during pregnancy than after pregnancy (VAS 4.87+/-2.4 vs. 6.60+/-2.6, P=0.001). Patients with fear of labor were characterized by pain intolerance also in circumstances other than labor. This fact may indicate enhanced sensitivity to pain-causing mechanisms in women who develop fear of labor.
    Pain 08/2001; 93(2):123-7. · 5.78 Impact Factor
  • Article: [Venous thrombosis during pregnancy].
    R Kaaja
    Duodecim; lääketieteellinen aikakauskirja 02/2001; 117(24):2621-5.

Institutions

  • 1990–2011
    • Helsinki University Central Hospital
      • Department of Obstetrics and Gynaecology
      Helsinki, Province of Southern Finland, Finland
  • 2008
    • Oulu University Hospital
      Oulu, Oulu, Finland
  • 1993–2005
    • University of Helsinki
      • • Department of Ophthalmology
      • • Department of Obstetrics and Gynaecology
      Helsinki, Province of Southern Finland, Finland
    • Hospital District for Helsinki and Uusimaa
      Helsinki, Province of Southern Finland, Finland
  • 1997–1999
    • Finnish Red Cross Blood Service
      Helsinki, Province of Southern Finland, Finland