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  • 1
    ISSN: 1540-8191
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Retrograde cerebral perfusion is a method that is recently being used for protection of the brain during operations on the aortic arch. This method is useful but is said to provide a limited time for protecting the brain. We designed an experiment in dogs to investigate neuropathologically the effect of protecting the brain for 120 minutes under: (1) circulatory arrest (CA); (2) retrograde cerebral perfusion with moderately cooled blood (RCPMC); and (3) retrograde cerebral perfusion with deeply cooled blood (RCPDC). We calculated the number of the abnormal cells of 400 hippocampal neurons per dog light microscopically. The number was 199 ± 23 (mean ± 1 SD) in the CA group, 149 ± 50 in the RCPMC group, and 72 ± 33 in the RCPDC group. The difference between the CA group and the RCPMC group was not statistically significant (p 〈 0.05), but there was a significant difference between the RCPMC and RCPDC groups (p 〈 0.05). The degree of cerebral protection provided by retrograde cerebral perfusion for 120 minutes is not sufficient when using moderately cooled blood. If we use deeply cooled blood at a temperature of about 10°C, we should obtain a sufficient degree of protection of the brain.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cardiac surgery 14 (1999), S. 0 
    ISSN: 1540-8191
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: AbstractBackground: JTV519 is know to protect cardiomyocytes from calcium overloading-induced damage. The aim of this study was to investigate the potential protective effect of JTV519 on myocardium subjected to prolonged ischemia and the underlying mechanism of such protection. The effect of JTV519 was also compared with that of diltiazem, a 1,5-ben-zothiazepine derivative. Methods: Isolated rat hearts were randomly divided into three groups. Control hearts were arrested with histidine-tryptophan-ketoglutarat (HTK) cardio-plegic solution alone. In the JTV519 group of hearts, cardiac arrest was achieved with JTV519 (10--3 mmol/L) in the HTK solution. Hearts in the diltiazem group were arrested with diltiazem (0.5 mmol/L) in the HTK solution. All the hearts were then subjected to 6-hour storage in HTK solution at 4°C. Results: After a 30-minute reperfusion, the left ventricular developed pressure in the JTV519 and diltiazem groups were improved significantly compared with the control group. There was a significantly lower left ventricular end-diastolic pressure level and higher recovery of coronary flow in the JTV519 group than in the control group. The postischemic intracellular calcium concentration was attenuated by adding JTV519 or diltiazem to HTK cardioplegia. Conclusion: As an adjunct to cardioplegia, JTV519 showed a significant protective effect on myocardium undergoing 6 hours of ischemia. The beneficial protective effects of JTV519 are correlated with its ability to inhibit the postischemic rise in intracellular calcium.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1540-8191
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Successful reconstruction of the aortic annulus for perivalvular leak following combined valve replacement was performed in two patients, 6 and 7 years postoperatively, using Manouguian's operation. A fistula was seen at the junction of the aortic annulus and the superior or inferior margin of the patch used for enlargement. This fistula was closed from both sides; from the left atrium with reinforced Teflon pledgets and from the aorta using a patch. Successful reconstruction of the aortic annulus was made, and no regurgitation was seen after the operation.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1619-0904
    Keywords: Circulatory support ; Step-by evaluation ; Biventricular function ; Pulmonary function ; Left ventricular assist system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract The purpose of this study was to examine the clinical results of current circulatory support with step-by evaluation of biventricular and pulmonary function. Six patients who had undergone cardiac surgery and two non-cardiotomy patients underwent current circulatory support with the step-by functional evaluation. Of six postcardiotomy patients, four patients with severe ischemic heart disease underwent coronary artery bypass giafting (CABG), and the remaining two patients with advanced aortic stenosis underwent aortic valve replacement (AVR). All six patients received intra-aortic balloon pump (IABP) support before or during operation. Two non-cardiotomy patients suffered from dilated cardiomyopathy, and both showed acute deterioration with cardiogenic shock or low cardiac output syndrome. Three of six postcardiotomy patients with circulatory support were weaned and discharged from the hospital. Two noncardiotomy patients in critical condition were successfully supported for more than 6 months by the Novacor left ventricular assist system (LVAS). We conclude that the ongoing current strategy of circulatory support with step-by functional evaluation might be applied for various types of severe heart failure with or without associated cardiac operations.
    Type of Medium: Electronic Resource
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