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Biomedical subjects

J Hajdú

Publications and source records attributed to J Hajdú.

At least 19 recordsLinked to original sources
PubMed2001

[Effectiveness of high-frequency oscillatory ventilation in the treatment of lung hypoplasia in connection with intrauterine growth retardation and maternal pre-eclampsia].

The authors examine in a retrospective study the effectivity of high frequency oscillatory ventilation in group of intrauterine retardated babies with clinical signs of lung hypoplasia. During one year period they treated 12 intrauterine retarded patients with high frequency oscillatory ventilation because of failure of conventional ventilation. The indications were in seven cases the high pCO2 level and in five ones low saturation in spite of surfactant administration. The birth weight of babies were between 770 grams and 2150 grams, and theirs gestational age between 29 and 35 weeks. Four patients died. The causes of death were in two cases severe cardiomyopathy and at two patients intraventricular haemorrhage. Two survivors are suffering of bronchopulmonary dysplasia. They suggest that immediate high frequency ventilation reduces the period of mechanical ventilation and the number of residual picture. They suggest, that lung hypoplasia is an underestimated diagnosis in intrauterine retardated babies. If the cause of respiratory failure in cases complicated with maternal preeclampsia is not only hyaline membrane disease it is necessary to look for signs of lung hypoplasia and to follow the treatment with high frequency oscillatory ventilation.

Adult↗
PubMed2001

Pulmonary stenosis and reactive right ventricular hypertrophy in the recipient fetus as a consequence of twin-to-twin transfusion.

The present study describes an association between adverse outcome in the twin-to-twin transfusion syndrome (TTTS) and pulmonary stenosis or reactive right ventricular hypertrophy. Six discordant monozygotic twin pregnancies with TTTS are described. Ventricular hypertrophy and atrioventricular valvular regurgitation occurred in all the recipient twins with pulmonary valvular stenosis in three cases and infundibular stenosis in one case. The recipient twin in one pair and both twins in another pregnancy died as a consequence of immaturity but the remaining twins all survived. Surgical intervention was required in one baby for valvular pulmonary stenosis. Our observations suggest that elevated blood pressure in the transfusion recipient may play an important role in pathogenesis. We hypothesise that both pulmonary stenosis and right chamber hypertrophy are secondary to hemodynamic changes. Although we have found valvular pulmonary stenosis in three recipients and infundibular stenosis in only one, this (obstruction to outflow) could be due to right chamber hypertrophy.

Adolescent↗
PubMed2001

Apoptosis in various organs of preterm infants: histopathologic study of lung, kidney, liver, and brain of ventilated infants.

Apoptosis, the well-characterized form of active programmed cell death, is a physiologic phenomenon in embryonal and fetal life in developing organs. Severe hypoxia, which occurs in most preterm infants, also leads to cell death, which may be necrotic or apoptotic. The aim of our study was to examine the incidence of apoptosis in various organs (such as lung, kidney, and brain) of preterm infants who suffered from clinically proven respiratory distress causing infantile respiratory distress syndrome (IRDS), cardiac failure, and periventricular leukomalacia (PVL). Twenty-four autopsy cases were studied histologically to detect the apoptotic ratio, which was performed on the basis of hematoxylin and eosin staining and validated by terminal deoxynucleotidyl transferase-mediated nick end-labeling (TUNEL) reaction. Elevated apoptotic ratio was found in stages II, III, and IV of bronchopulmonary dysplasia (BPD) among alveolar and bronchiolar cells. The apoptotic activity was very low in stage I of BPD. High apoptotic ratio was detected in hypoxic injuries of the central nervous system (CNS) of preterm infants. Features of apoptosis were present in proximal and excreting tubules of the kidney. Significant elevation of apoptotic activity may play a role in the development of BPD, ischemic brain lesions, and renal failure.

Apoptosis↗
PubMed1999

[Congenital heart abnormalities and cardiac dysfunction: how prenatal diagnosis changed the chances for survival].

Because of the rapid development of sonography, there are many new informations on embryonal and fetal circulation and pathophysiology of decompensation. Echocardiography is a useful tool to follow intrauterine therapy. Authors have examined the effect of prenatal diagnosis on the prevalence of heart abnormalities, terms of cardiac surgery, perinatal mortality and mortality due to heart abnormalities or decompensation. During five years they have found 187 severe heart abnormalities. Because of parental request 90 pregnancies have been terminated. Following prenatal diagnosis in 16 cases planned surgery of the newborn, in 14 cases planned cesarean sections have been done. From 64 transplacentar treatments 44 patients have survived. Authors have found, that prenatal diagnosis had good effect on short term survival rate but had no effect on long term survival rate. Fetal echocardiography has selective and therapeutic effect. The selective effect depends on second trimester screening. The therapeutic effect was significant in cases of arrhythmias and decompensation.

Congenital Abnormalities↗
PubMed1999

Is adolescent pregnancy associated with adverse perinatal outcome?

BACKGROUND: The number of teenage pregnancies has increased throughout the world and these pregnancies are reported in association with a higher rate of maternal and fetal complications. AIM OF THE STUDY: To evaluate the social surroundings; the results of ante-, intrapartum surveillance and perinatal outcome in adolescent pregnancies where mothers were below the age of 18. METHODS: Between 1st January, 1991 and 31st December, 1996 there were 13,131 births at our department. During this period, 209 newborns were born of 207 adolescent mothers. We compared the data of adolescent mothers with the data of all mothers who delivered in Hungary during the study period. RESULTS: 39 (18.6%) from 209 newborns were delivered before 37th week of gestation, and 34 (16.3%) newborns showed signs of intrauterine growth retardation (IUGR). The rate of primiparous adolescent mothers was 72.0%, 131 (63.3%) were primigravidae, and 136 (65.7%) received adequate prenatal care. Maternal complications (pregnancy induced hypertension, threatened preterm delivery, gestational diabetes and pre-eclampsia) and adverse perinatal outcome (higher rate of IUGR and perinatal mortality) were found more frequently in adolescent pregnancies. CONCLUSIONS: As young maternal age is associated with an increased risk of unfavourable fetal outcome, teenage mothers need improved prenatal care and increased observation during labour. In addition, improvement of the social environment of adolescents and the prevention of teenage pregnancies should be recommended.

Adolescent↗
PubMed1998

[Familial heterotaxy syndrome. Case report and review of the international literature].

The authors report two families with two affected siblings of heterotaxy syndrome. Ivemark syndrome with asplenia and complex cardiovascular malformation occurred in two siblings of the first family. The first affected sibling in the second family had situs inversus, transposition of the great arteries with spleen on the right side of the abdomen. Ivemark syndrome with polysplenia and cardiovascular malformation were present in the second affected sibling of the second family. Autosomal recessive inheritance of Ivemark syndrome was reported in the most of the cases, but there are several cases of autosomal dominant inherited Ivemark syndrome. X-linked inheritance of heterotaxy syndrome is also known. Heterotaxy syndromes could also occurred in chromosomal translocation or deletion in sporadic cases. The molecular genetic studies were not able to find the mutation responsible for heterotaxy syndrome. The diagnosis of heterotaxy syndrome could be made by foetal echocardiography until molecular genetic methods are available. Therefore, in the case of positive anamnesis, foetal echocardiography on the 18-20 weeks of gestation is essential diagnostic method.

Abnormalities, Multiple↗
PubMed1998

[Acardius (TRAP-sequence) (Twin Reversed Arterial Perfusion)].

Two cases of acardius were observed by the authors among nearly twenty thousand deliveries in the seven year period of the 1st Department of Obstetrics and Gynecology, between 1990 and 1. July 1997. The incidence of acardia which was found in this material is more than three times higher than the incidence generally given in the literature. Presenting the cases, the contemporary possibilities of prenatal diagnosis of this highly pathologic form of monozygotic twin pregnancy are discussed in details, further a survey is given of the new, so far experimental, but promising, less and less invasive interventions directed towards in utero terapy by closing the connecting vessels, including also laser occlusion of chorioangiopagus.

Abnormalities, Multiple↗
PubMed1998

[Fetal atrioventricular septal defect associated with Patau and Edwards syndromes, as well as trisomy 22].

The atrioventricular septal defect is usually associated with trisomy 21 and it may be observed in the heterotaxia syndromes. Atrioventricular septal defect may be associated with 8p deletion. There are reported cases of familial atrioventricular septal defect. Atrioventicular septal defect is rarely associated with other chromosomal abnormalities. We are reporting three unusual cases of atrioventricular septal defect that were associated with trisomy 13, 18 and 22. This association may be due to effect of genetic loci on the 13, 18 and 22 chromosome which could play the role in the development and fusion of endocardial cushion and atrioventricular septal defect.

Adult↗
PubMed1998

[Severe left heart developmental disorder and severe fetal arrhythmia in the same family--a coincidental association?].

The etiology, pathogenesis and risk for inheritance of congenital heart abnormalities are important questions. The development of fetal echocardiography and fetopathology helped in examination of this problem. Between September 1992 and June 1997 there were found four families where one member of the family had hypoplastic left heart syndrome and other member sustained fetal arrhythmia. The familiarity of hypoplastic left heart syndrome and some special forms of arrhythmias are well known. The reported familial association of these two abnormalities which in the first in the literature, may have a possibility that a sustained ectopic atrial arrhythmias are as severe risk factors for left heart abnormalities as other left heart abnormalities are.

Adult↗
PubMed1998

[Fetal myocardial calcification (report of 4 cases and review of the literature].

(Report of four cases and review of the literature) Calcification of the myocardium is a rare condition. The cause may be dystrophic or metastatic. An autosomal recessive inherited idiopathic arterial calcification of infancy is more rare abnormality. A dystrophic calcification is the more common of the three and may occur in areas of necrosis, hemorrhage, or fibrosis of the myocardium. Metastatic calcification is associated with hyperparathyroidism, D hypervitaminosis or renal failure, usually accompanied by the deposit of calcium in other organs, particularly the lungs, stomach, kidneys, spleen and liver. Authors report four cases of myocardial calcification diagnosed in intrauterine life. They give a review of literature of fetal and neonatal myocardial calcification.

Adult↗
PubMed1998

[Prenatal diagnosis of atrioventricular septal defect and its prognostic significance].

Atrioventricular septal defect also known as endocardial cushion defect is severe congenital heart disease which is often associated with chromosomal abnormalities (30-50%) or is a part of a malformation syndrome (30%). Between 1, october 1992, and 30, september 1996. 21 cases were diagnosed prenatally. The chromosomal analysis found in 1 case trisomy 18, in 1 case trisomy 22 and in 7 cases trisomy 21. In 7 cases atrioventricular septal defect was part of Ivemark syndrome, none of them had chromosomal abnormality, except 1, who had trisomy 18. Out of 21 cases there was only one survivor. None of cases associated with Ivemark syndrome survived. In 4 cases sibs or parents had congenital heart disease. Four mother were above 40 years. The report summarises the most important abnormalities in the prenatal diagnosis of endocardial cushion defect and echocardiographic and embryopathologic foundings.

Echocardiography↗
PubMed1998

Fetal hydropericardium associated with left ventricular diverticulum.

Fetal pericardial effusion usually develops because of fetal heart failure, infections, chromosomal abnormalities, fetal anaemia, intracardiac or extracardiac tumours. There is only one case in the literature of isolated hydropericardium associated with left ventricular diverticulum and here we report another.

Abortion, Induced↗
PubMed1997

[Peritoneal hemorrhage caused by trophoblast tissue implanted on the peritoneum 6 weeks following induced abortion].

A case of heavy intraperitoneal bleeding from perimetrical implanted trophoblast tissue on the uterus was reported following artificial abortion. The six weeks previously terminated pregnancy was verified by transvaginal ultrasound examination, the unrecognised simultaneous extrauterine pregnancy was excluded. The mechanism of peritoneal implantation of trophoblast tissue is unknown. The authors reported the successful conservative treatment and analyzed possible origin of this rare localisation of trophoblast tissue.

Abortion, Induced↗
PubMed1997

[Management of hemodynamically significant fetal arrhythmias].

Between January 1, 1993, and April 30, 1996, authors treated 23 fetuses with severe rhythm disturbances in their Department. The correct diagnosis was made by fetal echocardiography. They had 15 tachyarrhythmic and 8 bradyarrhythmic patients. They found hydrops fetus at 7 patients because of atrial flutter (2 fetuses), supraventricular tachycardia (4 fetuses) and severe bradycardia (1 fetus). They treated successfully 13 patients with antiarrhythmic therapy given to the mother. They had 1 intrauterine death (treated because of bradycardia) and 1 neonatal death (hydropic because of supraventricular tachycardia). The causes of severe bradycardia were maternal antibody (3 fetuses), cardiac malformation (3 fetuses) and large number of blocked atrial extrasystoles. The prognosis of fetal tachycardia is good even in cases of fetal hydrops. The prognosis of bradycardia due to heart abnormalities is poor.

Anti-Arrhythmia Agents↗
PubMed1997

[The effect of the delivery method on the mortality of very low birth weight infants in case of breech presentation].

The authors have investigated the data of 1009 neonates born from breech presentation in the I. Department of Obstetrics and Gynecology of Semmelweis Medical School between January 1., 1990 and December 31., 1995. The frequency of caesarean section in this group was 75.5%. In the subgroup of very small neonates (those under the birthweight of 1500 grams) caesarean section was performed in 71.4%. In this group 73.8% of the neonates were alive on the 28th postpartum day, as opposed to 37.7% in the group spontaneously delivered. The difference proved to be significant in the group weighing between 750 and 1249 grams. Intraventricular haemorrhage was also more frequent in the group spontaneously delivered. The difference was not significant in the groups under 750 grams and between 1250 and 1500 grams birthweight. Based on their investigation the authors conclude, that in the group of fetuses whose estimated birthweight is predicted to be between 750 and 1250 grams by ultrasound examination, perinatal mortality and morbidity rates in breech presentation can be improved by performing caesarean section.

Breech Presentation↗
PubMed1997

Ivemark syndrome with asplenia in siblings.

We describe two siblings with Ivemark syndrome. In both cases, absent spleen, symmetric liver, and lungs with three lobes were associated with complex cardiac malformation. The syndrome was diagnosed prenatally in the second case by fetal echocardiography at the twentieth week of pregnancy. The autosomal recessive mode of inheritance of Ivemark syndrome is further supported by these cases.

Abnormalities, Multiple↗
PubMed1997

Is the presence of distant metastasis associated with c-myc amplification in gastric cancer?

The expression of the c-myc oncogenes has already been reported in human gastric carcinoma. Overexpression can be the consequence of oncogene amplification and often correlates with different prognostic factors. Authors investigated the value of c-myc oncogene amplification in 23 patients (9 male, 14 female, aged 28-85 yrs) with gastric cancer and its correlation to the following clinical and histopathological parameters: grade, TNM stage, Lauren's type, localisation and severity of disease. DNA was isolated from formalin-fixed, paraffin embedded tissue for quantitative dot-blot hybridisation. Amplified c-myc was found in 6 out of 23 cases. Its values ranged from 2.12 up to 18.2 (average 9.1). Significant association was found between the presence of c-myc amplification and distant metastasis (corr. coeff.: 0.5623, p < 0.01). High scores of the other parameters also correlated with c-myc, albeit not significantly. The result of cluster analysis, based on the similarity of the parameter values for the individual patients proved that the age was the decisive factor in creating two groups. The distribution of patients into these groups did not seem to coincide with the presence of c-myc amplification or distant metastasis, inspite of the proved correlation between them.

Adult↗