Biomedical subjects
E Chazov
Publications and source records attributed to E Chazov.
Tribute to Paul Dudley White.
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Cooperation not confrontation: the imperative of a nuclear age. The message from Budapest.
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The localization of the MM isozyme of creatine phosphokinase on the surface membrane of myocardial cells and its functional coupling to ouabain-inhibited (Na+, K+)-ATPase.
A rat heart plasma membrane preparation isolated in a sucrose medium and some of its enzymatic properties have been investigated. It has been shown that a rat heart plasma membrane fraction contains high creatine phosphokinase activity which can not be diminished by repeated washing with sucrose solution. Creatine phosphokinase extracted from a plasma membrane fraction with potassium chloride and 0.01% deoxycholate solution is electrophoretically identical to MM isoenzyme of creatine phosphokinase. Under the conditions where (Na+,K+)-ATPase is activated by addition of Na+, K+ and MgATP, creatine phosphokinase of plasma membrane fraction is able to maintain a low ADP concentration in the medium if creatine phosphate is present. The rate of creatine release is dependent upon MgATP concentration in accordance with the kinetic parameters of the (Na+,K+)-ATPase and is significantly inhibited by ouabain (0.5 mM). The rate of creatine release is also dependent on creatine phosphate concentration in conformance with the kinetic parameters of MM isozyme of creatine phosphokinase. It is concluded that in intact heart cells the plasma membrane creatine phosphokinase may ensure effective utilization of creatine phosphate for immediate rephosphorylation of ADP produced in the (Na+,K+)-ATPase reaction.
Myocardial ammonia metabolism in patients with heart disease as revealed by coronary sinus catheterization study.
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Experience with the work of specialized first-aid service and specialized units for treating patients with myocardial infarction.
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Giant aneurysm of the coronary artery.
A case of a patient presenting a giant size mass compressing the SVC and IVC is presented. Chest X-ray, substernal echo-scanning, magnetic resonance tomography, etc. led to the hypothesis of a benign cardiac tumor or cardiac echinococcosis. However, surgical examination revealed a giant aneurysm of the coronary artery which was successfully treated.