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Biomedical subjects

L Hajdu

Publications and source records attributed to L Hajdu.

8 recordsLinked to original sources
PubMed2000

[Coronary revascularization on beating heart].

At authors clinic 563 coronary artery bypass graft procedures were done from 1. January 1998 to 15. September 1999. 134 coronary revascularizations were performed from the same surgical team on beating heart using the same surgical technic at normothermia. Out of them, 98 operations were done with and 36 without ECC support respectively. Patients were operated on with this sophisticated technic exclusively during this period. Conversion to cardiac arrest was not necessary in any case. Male/female ratio was 76/58, 84% of the patients suffered from one or more preoperative myocardial infarction. The average bypass number was 2.7/patient. Arterial revascularization was performed in 94%. Postoperative mortality was 2.2% (3 pts). The postoperative inotropic demand, myocardial infarction rate (CK-MB release) and the amount of bleeding was very low. Mean postoperative stay in the ICU decreased to the average of 19 hrs. Patients normally left hospital on the 7th postoperative day. This operative technique--performed by an experienced surgeon--is less invasive for the heart and other organ systems, the incidence of complications can be decreased and the principle of complete revascularization is not compromised.

Coronary Artery Bypass↗
PubMed1997

[Aortic regurgitation caused by quadri-cuspid aortic valve].

Authors report the surgical treatment of a rare malformation of the aortic valve associated with coronary artery stenosis. The aortic valve had a supernumerary cusp which was revealed intraoperatively. The supernumerary cusp appeared to be similar in size to the three other. Surveying the literature it is stated, that the number of similar entities are about 50 in number. Autopsy findings note, that the prevalence is about 0.008-0.012%. During the past 25 years, in aortic valve replacement cases such entity could have not been explored. The possible significance of the entity lays in--that without rheumatic or degenerative origin-in the life span (above 40 years of age) it may lead to severe regurgitation leading to functional deterioration.

Abnormalities, Multiple↗
PubMed1994

Protostrongylidae in Cervidae and Ovibos moscatus: a clustering based on isoelectric focusing on nematode body proteins.

Isoelectric focusing for protein separation and evaluation by Unweighted Pair Group Method with Arithmetic averages (UPGMA) clustering was tested as an alternative to a morphological approach to taxonomical studies of the family Protostrongylidae and the genus Elaphostrongylus. These analyses revealed a close relationship among first stage protostrongylid larvae from roe deer, muskoxen and Varestrongylus alces first stage larvae. Furthermore, first stage larvae collected from moose faeces and adult Elaphostrongylus in moose were found related. Adult Elaphostrongylus in moose and reindeer maintained their separate taxonomical status.

Animals↗
PubMed1991

Evaluation of an indirect ELISA for the detection of antibodies to bovine leukaemia virus in milk and serum.

An indirect enzyme-linked immunosorbent assay (ELISA) was developed to detect antibodies to BLV in milk and serum (Juntti et al., 1989). The conjugate consists of a monoclonal anti-bovine IgG1 and IgG2 labelled with horseradish peroxidase (HRP). The indirect ELISA was calibrated with EEC reference serum E 4. Standard serum E 4 was scored positive when diluted 8192 times in negative milk and between 12,800 and 25,600 times in negative serum. The sensitivity and specificity of the indirect ELISA relative to the agar gel immunodiffusion test (AGID) were 100% and 99.8%, respectively. ELISA results for milk and sera from 614 dairy cows agreed to 100%. The absorbance value in bulk milk could be used to roughly predict the rate of BLV infection among lactating cows in a herd. An infection rate of 4 to 5% in a herd could be detected in the ELISA. Results were applied in a nation-wide screening of more than 24,000 bulk-milk samples, and the subsequent introduction of an eradication programme for BLV. The aim is to eliminate the infection from Swedish herds in 5 to 10 years.

Animals↗
PubMed1991

Fibronectin binding by Salmonella strains: evaluation of a particle agglutination assay.

Thirty-five Salmonella strains isolated from human cases of salmonellosis were tested and compared for their fibronectin (fn) binding capacities by using two fn-particle agglutination assays (fn-PAAs) prepared by coating with human fn either (i) latex beads (Difco; 0.81-micron diameter) (L-fn-PAA) or (ii) heat-killed formalin-treated Staphylococcus aureus Cowan 1 cells (C-fn-PAA). Six S. aureus strains were also included in this study as controls. The strains were cultured on colonization factor antigen agar and blood agar and in tryptic soy broth and brain heart infusion broth. The Salmonella and S. aureus strains were cultured at 33 and 37 degrees C, respectively, for optimal expression of fn-binding proteins. Bacterial cells (approximately 10(10) cells per ml) harvested from growth in various culture media and suspended in 0.02 M potassium phosphate buffer (pH 6.8) agglutinated the fn-PAA reagents. These reactions were scored semiquantitatively from + to + depending on the speed or intensity of the reactions within 2 min. Maximum agglutination in fn-PAA systems was observed when the cells were grown in brain heart infusion broth, while tryptic soy broth proved to be least suitable media for culturing cells for fn-PAAS. Although a statistically highly significant correlation was obtained between results of assays of radiolabeled fn and 29-kDa fragment binding, no significant correlation was observed (i) between the results of strains cultured in different media or (ii) when semiquantitative score results of the two fn-PAA systems were compared with those of the conventional radiolabeled fn assay. To enhance the efficiency of the test system, the C-fn-PAA reagent was stained with methylene blue (2% in 0.17 M glycine-NaOH buffer [pH 6.8]). This facilitated easy interpretation of results, which could be performed on hydrophobic paper instead of glass slides. The results obtained with both unstained C-fn-PAA and stained C-fn-PAA were comparable to each other and reproducible. Although the fn-PAAs are simple and easy to perform, the results did not differentiate between negative, low, moderate, and high binding abilities when Salmonella strains were evaluated for fn binding, and the results were not comparable to those obtained by the conventional radiolabeling method.

Adult↗
PubMed1991

Coronary artery revascularization after myocardial infarction.

Authors report on the revascularization resulted by noninvasive and invasive interferences carried out 6-9 months after surgery and on the improvement of functional status of 56 postinfarction patients with recurrent angina pectoris. They conclude that recoronarography performed in 12 patients revealed diminished patency rate as compared to the estimated rate, especially in those cases, where complete revascularization was considered to have been carried out. Ejection fraction, wall motion score by ventriculography and echocardiography did not seem to improve significantly. However Dipyridamole Thallium scintigraphy showed marked improvement in perfusion in all cases. NYHA functional status noticeably improved in the re-examined patients.

Adult↗