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Biomedical subjects

T Kural

Publications and source records attributed to T Kural.

28 records · Page 2Linked to original sources
PubMed1994

Oxygen free radicals in erythrocytes during open heart operation.

This study was performed to observe the effect of myocardial ischemia on the patients undergoing cardiopulmonary bypass (CPB) operation. For this aim, superoxide dismutase (SOD) activities, reduced glutathione (GSH) and lipid peroxide (LP) levels were determined in blood samples which were obtained from the coronary sinus. Sampling times were as follows: (1) Before CPB. (2) Immediately after CPB. (3) Fifteen minutes after the second specimen. (4) Thirty minutes after the second specimen. SOD activities of these groups were 5135.10 +/- 278.51 U/g Hb, 3505.64 +/- 302.09 U/g Hb, 4206.55 +/- 272.25 U/g Hb, 4707.20 +/- 270.91 U/g Hb respectively. Also the LP levels were 1.90 +/- 0.29 nmol MDA/ml, 4.37 +/- 0.52 nmol MDA/ml, 4.09 +/- 0.39 nmol MDA/ml, 2.74 +/- 0.30 nmol MDA/ml respectively. GSH levels were slightly increased during ischemia and reperfusion; 103.27 +/- 5.18 mg/dl, 125.00 +/- 10.36 mg/dl, 125.00 +/- 6.61 mg/dl, 111.18 +/- 8.22 mg/dl respectively. SOD activities were reduced significantly in second group (p < 0.001), in third and fourth groups (p < 0.01) as compared with control group. Also LP levels were increased significantly in all groups (p < 0.001) as compared with controls. Our results confirm the generation of oxygen free radicals from ischemia and reperfusion of heart during CPB. Also it appears that oxygen free radical generation exceeds the capacity of intracellular SOD, which is the most important scavenger of free radical in the cell.

Adolescent↗
PubMed1993

Right ventricular cardiomyopathy similar to Uhl's anomaly with atrial flutter and complete AV block.

We report an adult patient with right ventricular cardiomyopathy similar to Uhl's anomaly. In this patient an interesting manifestation is a transient atrial flutter with complete A-V block. Right ventricular cardiomyopathy (arrhythmogenic right ventricular dysplasia) is considered a cause of life-threatening arrhythmia. The right ventricular musculature is partially or totally absent and is replaced by fatty and fibrous tissue. Patients may present with ventricular arrhythmias, right heart failure or asymptomatic cardiomegaly. Only a few cases with atrioventricular conduction disturbance have been reported in the literature by now. We report such a case.

Animals↗
PubMed1992

[Diverticulosis of the small intestine].

The authors describe a case of a patient who has reoperated for generalized peritonitis shortly after elective inguinal hernia repair. The cause of peritonitis was small bowel diverticulosis with a ruptured diverticulum.

Aged↗
PubMed1989

Lentiginosis and right atrial myxoma.

A right atrial myxoma was detected by cross-sectional echocardiography in a 21-year-old woman with cutaneous lentiginosis. The lentigines were present mainly on the right side of the trunk.

Adult↗
PubMedDate not supplied

Left atrial myxoma causing mitral insufficiency. Report of a case treated with mitral valve replacement.

A case of left atrial myxoma causing mitral insufficiency treated with valve replacement and diagnosed preoperatively as mitral stenosis is presented. The presence of mitral regurgitation is very rare in atrial myxomas and requires mitral valve replacement. In our case mitral regurgitaion was due to the mechanical trauma of the valve by the tumor mass because the patient had no history of rheumatic fever and the pathologic examination of the valve displayed neither rheumatic nor myxomatous degeneration.

Adult↗
PubMedDate not supplied

The factors effecting complement activation in open heart surgery.

The activation of the complement system was investigated in 10 patients with rheumatic valve disease having heart surgery. The C3c, C4, leukocyte count and polymorphonuclear neutrophil count were determined in the blood samples taken before anaesthesia, after anaesthesia, 10 minutes after protamine administration and after the closure of the skin incision. In addition, atrial blood samples were taken after the release of the cross-clamp and pulmonary neutrophil trapping was investigated. In this study C3c and C4 consumption was found to take place after 30 minutes of CPB (cardiopulmonary bypass) and 10 minutes after protamine administration; the affects of anaesthesia and heparin were not significant.

Adult↗
PubMedDate not supplied

Clinical results of mitral valve replacement with and without preservation of the posterior mitral valve leaflet and subvalvular apparatus.

In this study we attempted to investigate the importance of posterior leaflet preservation during mitral valve replacement (MVR). One hundred and forty randomly selected patients with isolated mitral insufficiency were studied, half of whom had MVR with preservation of the posterior leaflet (Group I), whereas in the other half conventional MVR was performed, without preservation of the posterior leaflet (Group II). Within these two groups there were no in hospital deaths, but 5 patients in Group II were admitted to the hospital with congestive heart failure and 3 of them died after approximately 6 months. Long term mortality rate was 4.2% in Group II. Ejection fraction (EF) decreased postoperatively from 56% to 50% in Group I (p less than 0.05), and from 59% to 49% in Group II (p less than 0.05). Fifteen patients in each group and aged below 30 with sinus rhythm and in the first functional capacity according to the New York Heart Association classification (NYHA) were subjected to exercise study, 18 months after the operation. After exercise EF increased from 47% to 64% in Group I and decreased from 51% to 47% in Group II. These findings suggested that MVR with the preservation of the chordae tendineae can be done with a low morbidity and mortality rate in the early and late postoperative period.

Chordae Tendineae↗