6125 results
Cited 13 times since 1998 (0.5 per year)
source: EuropePMC
Vision research,
Volume 38, Issue 5, 1 1 1998, Pages 659-668
Stereoscopic segregation of transparent surfaces and the effect of motion contrast.
Lankheet MJ, Palmen M
Stereoscopic segregation in depth was studied using two superimposed frontoparallel surfaces displayed in dynamic random dot stereograms. The two patterns were positioned symmetrically in front of and behind a binocular fixation point. They were either stationary, or they could move relative to each other. Sensitivity for segregation was established by adding gaussian distributed disparity noise to the disparities specifying the two planes, and finding the noise amplitude that gave threshold seg...
Abstract
Cited 66 times since 1998 (2.4 per year)
source: EuropePMC
Arteriosclerosis, thrombosis, and vascular biology,
Volume 18, Issue 2, 1 1 1998, Pages 265-271
-455G/A polymorphism of the beta-fibrinogen gene is associated with the progression of coronary atherosclerosis in symptomatic men: proposed role for an acute-phase reaction pattern of fibrinogen. REGRESS group.
de Maat MP, Kastelein JJ, Jukema JW, Zwinderman AH, Jansen H, Groenemeier B, Bruschke AV, Kluft C
Increased plasma fibrinogen levels have been identified as a risk indicator for myocardial infarction, stroke, and thrombosis. Both environmental and genetic factors make an important contribution to plasma fibrinogen levels in humans. In the present study we evaluated, in patients with serum cholesterol levels between 4 and 8 mmol/L, the relation of plasma levels and polymorphisms of fibrinogen with coronary artery disease (CAD), cross-sectionally at baseline and after a 2-year follow-up period...
Abstract
Cited 11 times since 1998 (0.4 per year)
source: EuropePMC
The American journal of cardiology,
Volume 81, Issue 3, 1 1 1998, Pages 302-305
Subcutaneous single-incision implantation of cardioverter-defibrillators under local anesthesia by electrophysiologists in the electrophysiology laboratory.
van Rugge FP, Savalle LH, Schalij MJ
Implantable cardioverter-defibrillators (ICDs) have traditionally been implanted at the operating room under general anesthesia. Endocardial lead systems and downsized devices allowed implantation by electrophysiologists in the pectoral region. The present study evaluates the safety and efficacy of subcutaneous ICD implantation performed entirely by electrophysiologists using a single-incision approach for lead insertion and device placement under local anesthesia. Between June 1996 and May 1997...
Abstract
Cited 102 times since 1998 (3.8 per year)
source: EuropePMC
Circulation,
Volume 97, Issue 7, 1 1 1998, Pages 666-672
Functional and metabolic evaluation of the athlete's heart by magnetic resonance imaging and dobutamine stress magnetic resonance spectroscopy.
Pluim BM, Lamb HJ, Kayser HW, Leujes F, Beyerbacht HP, Zwinderman AH, van der Laarse A, Vliegen HW, de Roos A, van der Wall EE
Background: The question of whether training-induced left ventricular hypertrophy in athletes is a physiological rather than a pathophysiological phenomenon remains unresolved. The purpose of the present study was to detect any abnormalities in cardiac function in hypertrophic hearts of elite cyclists and to examine the response of myocardial high-energy phosphate metabolism to high workloads induced by atropine-dobutamine stress. Methods and results: We studied 21 elite cyclists and 12 healthy...
Abstract
Cited 28 times since 1998 (1 per year)
source: EuropePMC
Recent results in cancer research. Fortschritte der Krebsforschung. Progres dans les recherches sur le cancer,
Volume 147, 1 1 1998, Pages 107-119
Isolated hepatic perfusion with tumor necrosis factor alpha and melphalan: experimental studies in pigs and phase I data from humans.
de Vries MR, Borel Rinkes IH, van de Velde CJ, Wiggers T, Tollenaar RA, Kuppen PJ, Vahrmeijer AL, Eggermont AM
We report our experience with isolated hepatic perfusion (IHP) with tumor necrosis factor (TNF) and melphalan in an experimental pig study and of a phase I study in humans. IHP was performed with inflow catheters in the hepatic artery and portal vein and an outflow catheter in eh caval vein. An extracorporeal venovenous bypass was used. IHP consisted of a 60-min perfusion with hyperthermia (> 41 degrees C). For the pig protocol rhTNF alpha 50 micrograms/kg alone (n = 5) or rhTNF alpha 50 micr...
Abstract
Cited 31 times since 1998 (1.1 per year)
source: EuropePMC
Clinical genetics,
Volume 53, Issue 1, 1 1 1998, Pages 27-33
The Asn9 variant of lipoprotein lipase is associated with the -93G promoter mutation and an increased risk of coronary artery disease. The Regress Study Group.
Kastelein JJ, Groenemeyer BE, Hallman DM, Henderson H, Reymer PW, Gagné SE, Jansen H, Seidell JC, Kromhout D, Jukema JW, Bruschke AV, Boerwinkle E, Hayden MR
Two mutations in the lipoprotein lipase (LPL) gene, a T to G transition at position -93 of the proximal promoter region and an Asp9Asn substitution in exon 2, were examined in 762 Dutch males with angiographically-diagnosed coronary artery disease (CAD) and 296 healthy normolipidemic Dutch males. The two mutations exhibited strong linkage disequilibrium (D' = 0.975). A significantly higher proportion of cases (4.86%) than controls (1.37%) carried the -93G/Asn9 allele (p = 0.008). In the com...
Abstract
Cited 5 times since 1998 (0.2 per year)
source: EuropePMC
The American journal of cardiology,
Volume 81, Issue 2, 1 1 1998, Pages 152-157
Clinical and angiographic outcome of Micro Stent II implantation in native coronary arteries.
Oemrawsingh PV, Tuinenburg JC, Schalij MJ, Jukema JW, Reiber JH, Bruschke AV
To evaluate immediate success and 6-month restenosis rate, 70 Micro Stents II were implanted for 65 stenoses in 63 patients (age 59+/-9 years). Stable angina pectoris was present in 47% of the patients (38% class I to III; 9% class IV), whereas 32% had postinfarction angina and 21% had unstable angina. Indications for stent implantation were elective in 62% and semi-elective in 38% of the patients. Sixty-two percent of the patients received ticlopidin and acetylsalicylic acid for 28 days, wherea...
Abstract
Cited 355 times since 1998 (13.1 per year)
source: EuropePMC
The New England journal of medicine,
Volume 338, Issue 2, 1 1 1998, Pages 86-93
The role of a common variant of the cholesteryl ester transfer protein gene in the progression of coronary atherosclerosis. The Regression Growth Evaluation Statin Study Group.
Kuivenhoven JA, Jukema JW, Zwinderman AH, de Knijff P, McPherson R, Bruschke AV, Lie KI, Kastelein JJ
Background: The high-density lipoprotein (HDL) cholesterol concentration is inversely related to the risk of coronary artery disease. The cholesteryl ester transfer protein (CETP) has a central role in the metabolism of this lipoprotein and may therefore alter the susceptibility to atherosclerosis. Methods: The DNA of 807 men with angiographically documented coronary atherosclerosis was analyzed for the presence of a polymorphism in the gene coding for CETP. The presence of this DNA variation wa...
Abstract
Cited 9 times since 1998 (0.3 per year)
source: EuropePMC
Catheterization and cardiovascular diagnosis,
Volume 43, Issue 1, 1 1 1998, Pages 19-27; discussion 28
Micro stent I, initial results, and six months follow-up by quantitative coronary angiography.
Schalij MJ, Savalle LH, Tresukosol D, Jukema JW, Reiber JH, Bruschke AV
The Micro stent (MS) is a balloon expandable stent that allows the treatment of stenoses in distal and tortuous coronary arteries. This prospective study was performed to evaluate initial and late results of MS implantations. A total of 127 MS (101 in native coronary arteries and 26 in saphenous vein grafts) were implanted in 85 patients (1.5 stents/pt, 65 male, and 20 female, age 62, +/-10 yr) with angina pectoris class II-III: 21 (25%), angina pectoris class IV: 41(48%), and acute myocardial i...
Abstract
Cited 34 times since 1998 (1.3 per year)
source: EuropePMC
Journal of virology,
Volume 72, Issue 1, 1 1 1998, Pages 862-867
Identification of the leader-body junctions for the viral subgenomic mRNAs and organization of the simian hemorrhagic fever virus genome: evidence for gene duplication during arterivirus evolution.
Godeny EK, de Vries AA, Wang XC, Smith SL, de Groot RJ
Simian hemorrhagic fever virus (SHFV) was recently reclassified and assigned to the new virus family Arteriviridae. During replication, arteriviruses produce a 3' coterminal, nested set of subgenomic mRNAs (sgRNAs). These sgRNAs arise by discontinuous transcription, and each contains a 5' leader sequence which is joined to the body of the mRNA through a conserved junction sequence. Only the 5'-most open reading frame (ORF) is believed to be transcribed from each sgRNA. The SHFV ge...
Abstract
Cited 15 times since 1998 (0.6 per year)
source: EuropePMC
Magnetic resonance imaging,
Volume 16, Issue 2, 1 1 1998, Pages 137-145
A new diagnostic approach to vascular rings and pulmonary slings: the role of MRI.
Beekman RP, Hazekamp MG, Sobotka MA, Meijboom EJ, de Roos A, Staalman CR, Beek FJ, Ottenkamp J
Unlabelled: The conventional diagnostic work-up of a patient suspected of having a vascular cause for stridor, or dysphagia, includes esophagography and bronchoscopy to delineate the abnormal structure without imaging the structure itself. Cine-angiography is regarded as the golden standard, but is not routinely performed. Magnetic resonance imaging (MRI) is non-invasive and has the important advantage over cine-angiography of depicting all structures in the field of view. Color Doppler echocard...
Abstract
Statistics in medicine,
Volume 16, Issue 24, 1 1 1997, Pages 2829-2841
On the statistical modelling of coronary arteriographic data: dynamics of coronary atherosclerosis related to systemic and focal parameters. REGRESS Study Group. Regression Growth Evaluation Statin Study.
Zwinderman AH, Jukema JW, van Boven AJ, Reiber JH
Existing methods to analyse data from repeated arteriographic progression/regression studies are restrictive and do not fully explore the dynamics of coronary artherosclerosis. We present a new approach making a distinction between new occlusions, new lesions, and growth of existing lesions. Random effect models, based on the logistic, the Poisson, and the normal distribution are proposed with correlation depending on distance. The data from the Regression Growth Evaluation Statin Study (REGRESS...
Abstract
Cited 4 times since 1997 (0.1 per year)
source: EuropePMC
Pflugers Archiv : European journal of physiology,
Volume 435, Issue 1, 1 1 1997, Pages 130-136
The effect of sarcoplasmic reticulum blockade on the force/frequency relationship and systolic contraction patterns in the newborn pig heart.
Klautz RJ, Baan J, Teitel DF
We investigated the relationship between heart rate and contractility in seven anaesthetized young piglets by measuring contractility at different atrial pacing rates. To study the origin of this relationship we repeated the measurements after blocking the sarcoplasmic reticulum calcium release channel with ryanodine. We assessed contractility using indices derived from instantaneous left ventricular pressure and volume measured by micromanometric and conductance catheters during rapid inferior...
Abstract
Cited 37 times since 1997 (1.4 per year)
source: EuropePMC
Circulation,
Volume 96, Issue 9, 1 1 1997, Pages 2978-2986
Left ventricular pressure-volume relationships before and after cardiomyoplasty in patients with heart failure.
Schreuder JJ, van der Veen FH, van der Velde ET, Delahaye F, Alfieri O, Jegaden O, Lorusso R, Jansen JR, Hoeksel SA, Finet G, Volterrani M, Kaulbach HG, Baan J, Wellens HJ
Background: The aim of this study was to elucidate whether beneficial effects of cardiomyoplasty (CMP) in patients with dilated cardiomyopathy are the result of a decrease in existing ventricular dilatation or a prevention of further dilatation. Methods and results: Combined micromanometer-conductance catheters were used to evaluate left ventricular pressure-volume relationships in six patients with dilated cardiomyopathy before and at 6 and 12 months after CMP. Acute changes in preload and afte...
Abstract
Cited 35 times since 1997 (1.3 per year)
source: EuropePMC
Journal of the American College of Cardiology,
Volume 30, Issue 6, 1 1 1997, Pages 1491-1499
Modulation of lipoprotein(a) atherogenicity by high density lipoprotein cholesterol levels in middle-aged men with symptomatic coronary artery disease and normal to moderately elevated serum cholesterol. Regression Growth Evaluation Statin Study (REGRESS) Study Group.
Cobbaert C, Jukema JW, Zwinderman AH, Withagen AJ, Lindemans J, Bruschke AV
Objectives: This study sought to examine whether lipoprotein(a) levels predict coronary artery lumen changes in patients with symptomatic coronary artery disease (CAD) and normal to moderate hypercholesterolemia. Background: Recent conflicting reports have confirmed or refuted the association of lipoprotein(a) with clinical events or angiographically verified disease progression. Methods: The association between serum lipoprotein(a) and changes in coronary artery lumen was studied in 704 men ent...
Abstract
Cited 87 times since 1997 (3.2 per year)
source: EuropePMC
Arteriosclerosis, thrombosis, and vascular biology,
Volume 17, Issue 11, 1 1 1997, Pages 2837-2842
Common C-to-T substitution at position -480 of the hepatic lipase promoter associated with a lowered lipase activity in coronary artery disease patients.
Jansen H, Verhoeven AJ, Weeks L, Kastelein JJ, Halley DJ, van den Ouweland A, Jukema JW, Seidell JC, Birkenhäger JC
We studied the molecular basis of low hepatic lipase (HL) activity in normolipidemic male patients with angiographically documented coronary artery disease (CAD). In 18 subjects with a lowered HL activity (< 225 mU/mL), all nine exons of the HL gene and part of the promoter region (nucleotides -524 to +7) were sequenced. No structural mutations in the coding part of the HL gene were found, but 50% of the subjects showed a C-to-T substitution at nucleotide -480. Screening for the base substitu...
Abstract
Cited 12 times since 1997 (0.4 per year)
source: EuropePMC
The Journal of thoracic and cardiovascular surgery,
Volume 114, Issue 5, 1 1 1997, Pages 844-846
Switch back: using the pulmonary autograft to replace the aortic valve after arterial switch operation.
Hazekamp MG, Schoof PH, Suys BE, Hutter PA, Meijboom EJ, Ottenkamp J, Huysmans HA
Abstract
Cited 16 times since 1997 (0.6 per year)
source: EuropePMC
Arteriosclerosis, thrombosis, and vascular biology,
Volume 17, Issue 10, 1 1 1997, Pages 2177-2187
Involvement of calcium and G proteins in the acute release of tissue-type plasminogen activator and von Willebrand factor from cultured human endothelial cells.
van den Eijnden-Schrauwen Y, Atsma DE, Lupu F, de Vries RE, Kooistra T, Emeis JJ
In this study, we investigated the role of Ca2+ and G proteins in thrombin-induced acute release (regulated secretion) of tissue-type plasminogen activator (TPA) and von Willebrand factor (vWF), using a previously described system of primary human umbilical vein endothelial cells (HUVECs). The acute release of TPA and vWF, as induced by alpha-thrombin, was almost zero after chelation of Ca2+i, showing that an increase in [Ca2+]i was required. It did not matter whether the increase in [Ca2+]i cam...
Abstract
Cited 106 times since 1997 (3.9 per year)
source: EuropePMC
Circulation,
Volume 96, Issue 8, 1 1 1997, Pages 2573-2577
Thermolabile methylenetetrahydrofolate reductase in coronary artery disease.
Kluijtmans LA, Kastelein JJ, Lindemans J, Boers GH, Heil SG, Bruschke AV, Jukema JW, van den Heuvel LP, Trijbels FJ, Boerma GJ, Verheugt FW, Willems F, Blom HJ
Background: Hyperhomocysteinemia, an independent and graded risk factor for coronary artery disease (CAD), may result from both environmental and hereditary factors. Methylenetetrahydrofolate reductase (MTHFR) catalyzes the conversion of methylenetetrahydrofolate to methyltetrahydrofolate, the methyl donor in the remethylation of homocysteine to methionine. A 677C-->T mutation in the MTHFR gene has been associated with elevated homocysteine concentrations in homozygous (+/+) individuals. Meth...
Abstract
Cited 6 times since 1997 (0.2 per year)
source: EuropePMC
The Journal of thoracic and cardiovascular surgery,
Volume 114, Issue 4, 1 1 1997, Pages 560-567
Acute elevation of coronary venous pressure does not affect left ventricular contractility in the normal and stressed swine heart: implications for the Fontan operation.
Klautz RJ, van Rijk-Zwikker GL, Steendijk P, Wilde J, Teitel DF, Baan J
Objective: After the Fontan operation the right atrium and, thus, the coronary sinus are connected to the pulmonary arterial system, which causes the coronary venous pressure to increase. We investigated the acute effects of elevation of coronary venous pressure on baseline hemodynamics, coronary venous flow, and left ventricular contractility. Methods: In acutely instrumented pigs, during complete right heart bypass and during constant cardiac output, pressure in the right atrium, right ventric...
Abstract
