No abstract available.
Humans

No abstract available.
Microdialysis* ; Myocardium*

No abstract available.
Animals ; Carnitine* ; Heart* ; Myocardium* ; Rats*

No abstract available.
Animals ; Heart* ; Rats* ; Wisconsin*

BACKGROUND: Intracellular calcium overload is a common final feature of the ischemic-reperfused heart and mediates the genesis of irreversible cell damage. Reactive oxygen medabolites have been known to play and important role as toxic mediators in myocardial injuries resulting from ischemia and reperfusion. In order to investigate the mechanism of intracellular calcium accumulation in the ischemic-reperfused myocardium, the present study observed the possible contribution of the reactive oxygen metabolite to the calcium transport of cardiac mitochondria. METHODS: Mitochondrial were isolated from rabbit hearts. The effects of a reactive oxygen metabolite, H2O2 on calcium uptake and release, redox states of endogenous pyridine nucleotides and glutathiones of mitochondria respiring with succinate were observed. Calcium uptake and release were monitored by dual-wave length spectrophotometer using a calcium indicator, arsenaze III. Contents and redox states of pyridine nucleotides and glutathiones were measured by enzymatic methods using spectrofluorometer and HPLC. RESULTS: Hydrogen peroxide(10-500microM) promoted calcium release dose-dependently from CA++-preloaded mitochondria, but did not affect the mitochondrial calcium uptake. The H2O2-induced calcium release was accompanied by simultaneous oxidation of the pyridine nucleotides and decrease in the content of the reduced form of glutathione(GSH). When mitochondria were treated with BCNU(N,N=bis(2-chloroethyl)-N-nitrosourea) to inhibit glutathione reductase and so as to reduce the GSH content, there were no increase in calcium release from the mitochondria. These results may indicate that H2O2 increases the permeability of cardiac mitochondrial membrane to calcium in association with the changes in redox state of endogenous pyridine nucleotides, but not with that of glutathiones. CONCLUSION: It is suggested that the reactive oxygen metabolites induce the release of calcium from mitochondria by altering the redox state of pyridine nucleotides, and it may partly be involved in the elevation of cytosolic calcium concentration in the ischemic-reperfused myocardial cells.
Calcium* ; Chromatography, High Pressure Liquid ; Cytosol ; Glutathione Reductase ; Heart ; Hydrogen ; Ischemia ; Mitochondria* ; Mitochondrial Membranes ; Myocardium ; Nucleotides ; Oxidation-Reduction ; Oxygen* ; Permeability ; Reperfusion ; Succinic Acid

Four hundred and fifty patients of cerebrovascular accident who underwent computerized tomographic scanning during the 45 months, from January 1978 to October 1981, at department of internal medicine, Kyung Hee University Hospital, were studied and following results were obtained. 1. In Korea, intracerebral hematoma(48.2%) is more common than cerebral infarction(27.6%). 2. 87.3% of intracerebral hemorrhage were comfirmed while 61.5% of cerebral infarction were identified by brain CT. 3. Cerebrovascular accidents are definitely developing in 6th decade(40.6%) and male is more often affected. 4. hypertension is the most common underlying disease(72.3%) of cerebral hemorrhage, 52.4% of cerebral infarction. 5. hematoma occurs most frequently in basal ganglia(40.6%) and cerebral infarction occurs most frequently in global area(48.4%). 6. Changes of consciousness level were observed in 54.2% of the cases of mild degree hematoma. Mortality was 6.2% in mild degree hematoma and 88.2% in severe degree hematoma. 7. In 26.2% of cerebral hematoma, inital CSF findings were normal in spite of the evidence of cerebral hematoma confirmed by CT scanning.
Brain* ; Cerebral Hemorrhage ; Cerebral Infarction ; Classification* ; Consciousness ; Hematoma ; Humans ; Hypertension ; Internal Medicine ; Korea ; Male ; Mortality ; Stroke* ; Tomography, X-Ray Computed

Serum lipids and lipoproteins were determined in 70 patients with hypertension, 40 patients with cerebral infarctions, and 41 patients with cerebral hemorrhage. The results were compared with findings in 64 healthy controls. The results are as follows; 1) Total cholesterol, VLDL-cholesterol, LDL cholesterol and total cholesterol/HDL-cholesterol ratio were significantly higher in patients with hypertension or cerebral infarction than in control group, but HDL-cholesterol showed no significant difference. 2) In Patients with cerebral hemorrhage, total cholesterol, LDL-cholesterol and HDL-cholesterol were higher than in normal controls. Total cholesterol/HDL-cholesterol ratio was within the limits of normal. It is possible that the susceptibility to cerebral infarction is the result of high total cholesterol/HDL cholesterol ratio rather than low HDL cholesterol. But our study suggests that hyperlipoproteinemia plays a minor role in the development of cerebral hemorrhage.
Cerebral Hemorrhage ; Cerebral Infarction ; Cholesterol ; Cholesterol, HDL ; Cholesterol, LDL ; Humans ; Hyperlipoproteinemias ; Hypertension* ; Lipoproteins

The duration of the phases of left ventricular systole was measured from simultaneous recordings of the electrocardiogram, phonocardiogram and carotid arterial pulse tracing using a multichannel photographic system with paper speed at 100 mm per second. Observations were made in 81 male and 66 female patients with hypertension and 41 healthy males and 38 healthy females who served as controls. All hypertension patients were classified by change in funduscopic finding, EKG and grade of diastolic pressure. STI were measured in each group and analysed. The resutls were as follows: 1. The normal PEP/LVET was 0.293 in male and 0.303 in female. 2. In male & female hypertensive patients, all STI were significantly difference to that of normal control except QA2. 3. In male hypertensive patients, the degree of EKG, funduscopic change and diastolic pressure were positive relation to the increase of PEP/LVET.
Blood Pressure ; Electrocardiography ; Female ; Humans ; Hypertension* ; Male ; Systole*

To evaluate the efficacy and safety of lovastatin, new hypolipidemic agent of HMG-CoA reductase inhibitor, we administered lovastatin 40mg to 80mg once daily for 12 weeks in 20 patients(7 males, 13 females) with primary hypercholesterolemia, and observed the sequential chamges of the lipid profile every 4 weeks. The results are as follows ; 1) The seurm total cholesterol was reduced significantly by 31% from 321+/-36mg% to 210+/-26mg%(p<0.05). 2) The serum triglycerides was significantly reduced from 321+/-168mg% to 228+/-74mg% by 29%(p<0.05). 3) The low density lipoprotein cholesterol was reduced significantly from 177+/-36mg% to 120+/-22mg% by 32%(p<0.05). 4) The total lipid, high density lipoprotein cholesterol and very low density lipoprotein cholesterol were also reduced significantly. 5) The ratio between total cholesterol and high density lipoprotein cholesterol, low density lipoprotein cholesterol and high density lipoprotein cholesterol did not change after lovastatin therapy. 6) There was no adverse reaction due to lovastatin therapy during 12 weeks of therapy. These results suggested that lovastatin is a effective and safe now hypolipidemic agent and is a convenient HMG-CoA reductase inhibitor for clinical use.
Cholesterol ; Cholesterol, HDL ; Cholesterol, LDL ; Cholesterol, VLDL ; Humans ; Hypercholesterolemia* ; Lovastatin* ; Male ; Oxidoreductases ; Triglycerides

Direction of blood flow and peak velocity measurement were made in the four cardiac valve and ascending aorta from 87 normal Korean adults (42 men and 45 women, age range 20-63 years) with CW Doppler echocardiography. Measurments of the peak velocities of mitral valve, tricuspid valve and aortic valve (ascending aorta) completed in the apical window using 2.0MHz Pedof transducer. The measurement of pulmonary flow completed in the parasternal view. Also aortic velocity data obtained from suprasternum (70/87), subcostal area (48/87) and right sternal border(41/87). Aortic flow velocity was highest (121+/-11.7 cm/xec), mitral flow velocity was 86.4+/-12.2 cm/sec, pulmonic flow was 85+/-13.3cm/sec, where as tricuspid was lowest (64.8+/-11.2cm/sec). The velocities of aorta obtained from apex (106.9+/-15cm/sec) and suprasternum (113.1+/-18.9cm/sec) were greater than other sites. These normal Doppler data provide a useful information for evaluating flow velocity pattern in patient with various heart disease.
Adult* ; Aorta* ; Aortic Valve ; Echocardiography, Doppler* ; Female ; Heart Diseases ; Heart Valves ; Humans ; Male ; Mitral Valve ; Transducers ; Tricuspid Valve