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SLATER EC. Phosphorylation coupled with the oxidation of alpha-ketoglutarate by heart-muscle sarcosomes. 3. Experiments with ferricytochrome c as hydrogen acceptor. Biochem J 2003; 59:392-405. [PMID: 14363107 PMCID: PMC1216256 DOI: 10.1042/bj0590392] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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DAVISON AN. Return of cholinesterase activity in the rat after inhibition by organophosphorus compounds. 2. A comparative study of true and pseudo cholinesterase. Biochem J 2003; 60:339-46. [PMID: 14389245 PMCID: PMC1215702 DOI: 10.1042/bj0600339] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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ROWE GG, HUSTON JH, MAXWELL GM, WEINSTEIN AB, TUCHMAN H, CRUMPTON CW. The effects of 1-hydrazinophthalazine upon coronary hemodynamics and myocardial oxygen metabolism in essential hypertension. J Clin Invest 2003; 34:696-9. [PMID: 14367526 PMCID: PMC438679 DOI: 10.1172/jci103121] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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PRINZMETAL M, EKMEKCI A, TOYOSHIMA H, KWOCZYNSKI JK. Angina pectoris. III. Demonstration of a chemical origin of ST deviation in classic angina pectoris, its variant form, early myocardial infarction, and some noncardiac conditions. Am J Cardiol 2000; 3:276-93. [PMID: 13626862 DOI: 10.1016/0002-9149(59)90212-7] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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CRANE FL, LESTER RL, WIDMER C, HATEFI Y. Studies on the electron transport system. XVIII. Isolation of coenzyme Q (Q275) from beef heart and beef heart mitochondria. ACTA ACUST UNITED AC 2000; 32:73-9. [PMID: 13628717 DOI: 10.1016/0006-3002(59)90554-2] [Citation(s) in RCA: 91] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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MAXWELL GM, CASTILLO CA, WHITE DH, CRUMPTON CW, ROWE GG. Induced tachycardia: its effect upon the coronary hemodynamics, myocardial metabolism and cardiac efficiency of the intact dog. J Clin Invest 2000; 37:1413-8. [PMID: 13575542 PMCID: PMC1062817 DOI: 10.1172/jci103731] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Abstract
Absolute influx and efflux of potassium-42 have been measured in isolated rabbit atria during acetylcholine-induced fibrillation. The efflux of potassium was increased three to four times; influx was not changed. The data are interpreted as indicating that an inhibition of active K uptake is not involved in the initiation of fibrillation, and that the process results from a marked increase in Na permeability.
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Abstract
To determine whether myocardial uptake of Rb
86
can be used as a useful index of coronary plasma flow, the extraction of Rb
86
from arterial plasma during one passage through the myocardium of dogs was measured at varying rates of flow. At rates of flow which are encountered in man, changes in the rates of flow and uptake of isotope by the myocardium paralleled each other closely. Rb
86
uptake is a useful index of coronary blood flow in dogs.
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AAES-JORGENSEN E, HOLMAN RT. Essential fatty acid deficiency. I. Content of polyenoic acids in testes and heart as an indicator of EFA status. J Nutr 2000; 65:633-41. [PMID: 13588408 DOI: 10.1093/jn/65.4.633] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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HOLLAND WC, KLEIN RL, BRIGGS AH. Factors affecting action of acetylcholine on transmembrane flux of K in isolated rabbit atria. ACTA ACUST UNITED AC 2000; 196:478-82. [PMID: 13627207 DOI: 10.1152/ajplegacy.1959.196.3.478] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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WEST JW, MERCKER H, WENDEL H, FOLTZ EL. Effects of renal hypertension on coronary blood flow, cardiac oxygen consumption and related circulatory dynamics of the dog. Circ Res 2000; 7:476-85. [PMID: 13652400 DOI: 10.1161/01.res.7.3.476] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A comparative study is presented on the circulatory dynamics of the renal hypertensive state, the stability (repeatability) of the findings in a given subject, the effect of anemia as a complicating factor and the amount of cardiac hypertrophy present in each animal at the end of the series of observations. The results indicate that in nonanemic renal hypertensive dogs with cardiac hypertrophy the coronary blood flow and cardiac oxygen consumption are the same per unit weight of myocardial tissue as in normal dogs. However, when a mild chronic anemia is a complicating factor, the coronary blood flow and the myocardial oxygen uptake are both increased. The coronary sinus venous oxygen saturation is essentially unchanged in the nonanemic hypertensives, whereas in the anemic hypertensives it is significantly lowered.
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Abstract
Evidence has accumulated suggesting acetylcholine may he involved in initiation of the heart heat. Acetylcholine and electrolyte metabolism in the various chambers of the heart have been studied. The area of highest intrinsic rhythm (sinus) contained greater amounts of acetylcholine equivalents, true cholinesterase, choline acetylase and sodium; all of these decreasing in amount in areas of lower intrinsie rhythm. It is concluded that intrinsic rhythm may he directly correlated with overall acetylcholine metabolism and sodium content and inversely related to overall energy metabolism and potassium concentration.
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Abstract
Deep hypothermia in the rat was studied with respect to the sequential changes in body temperature, heart rate, and electrocardiogram. In vitro assays of myocardial metabolic activity were made at temperatures ranging from 5 to 35 C. These assays strongly suggested that the in vivo cardiac dysfunctions observed at low temperatures were attributable to shifts in temperature kinetics of enzyme systems at 20 to 21 C.
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Abstract
Biochemical levels of inorganic phosphate, adenosine triphosphate, phosphocreatine and glycogen were determined on cardiac muscle, skeletal muscle and liver samples from hibernated 13-striped ground squirrels and those allowed to awaken for intervals of 7.5, 15 and 30 minutes. Cardiac muscle glycogen increases during hibernation apparently at the expense of skeletal muscle and liver glycogen. Glycolysis occurs in these tissues during early arousal, followed later by glycogenesis. Adenosine triphosphate is maintained in both cardiac and skeletal muscle during hibernation and is used as an energy source during arousal. It appears that glycolysis is important in resynthesizing phosphocreatine. From this study of periods of relatively low and high metabolic demands we conclude that phosphocreatine is a ‘transport’ form of high-energy phosphate forming adenosine triphosphate from the phosphate pool when and where needed in the cycle of intermediary metabolism.
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SAYEN JJ, SHELDON WF, PEIRCE G, KUO PT. Polarographic oxygen, the epicardial electrocardiogram and muscle contraction in experimental acute regional ischemia of the left ventricle. Circ Res 2000; 6:779-98. [PMID: 13585607 DOI: 10.1161/01.res.6.6.779] [Citation(s) in RCA: 126] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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THORN W, HEIMANN J. [The effects of anoxia, ischemia, asphyxia and hypothermia on the ammonia level in the brain, heart, liver, kidneys and muscles]. J Neurochem 2000; 2:166-77. [PMID: 13576143 DOI: 10.1111/j.1471-4159.1958.tb12361.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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REGAN TJ, CHRISTENSEN RC, WADA T, TALMERS FN, HELLEMS HK. Myocardial response to acetyl strophanthidin in congestive heart failure; a study of electrolytes and carbohydrate substrates. J Clin Invest 2000; 38:306-16. [PMID: 13631061 PMCID: PMC293157 DOI: 10.1172/jci103803] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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ANTHONY A, ACKERMAN E, STROTHER GK. Effects of altitude acclimatization on rat myoglobin; changes in myoglobin content of skeletal and cardiac muscle. ACTA ACUST UNITED AC 2000; 196:512-6. [PMID: 13627214 DOI: 10.1152/ajplegacy.1959.196.3.512] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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BECKETT EB, BOURNE GH. Some histochemical observations on enzyme reactions in goat foetal cardiac and skeletal muscle and some human foetal muscle. Cells Tissues Organs 2000; 35:224-53. [PMID: 13616878 DOI: 10.1159/000141411] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Abstract
Potassium in the working frog ventricle exists in two physiological compartments and the more slowly exchanging compartment is influenced by the amount of work performed, ventricular failure and ouabain. In the present study, the exchange of potassium in mitochondria is investigated both in the control state and after exposure to ouabain, in order to determine whether mitochondria potassium represents the slowly exchanging compartment. Mitochondria potassium represents only 15% of the total ventricular potassium, while the slowly exchanging phase contains about 50%. Ouabain perfusion is associated with inhibition of entrance of potassium into the slowly exchanging ventricular phase, but no isolated specific effect on the mitochondria potassium is found. Alterations in mitochondria potassium directly reflect changes within the total ventricle. A fraction of mitochondria potassium is found to be inexchangeable under the conditions of the experiment. The results indicate that mitochondria potassium does not represent the major part of the slowly exchanging compartment.
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MORGAN HE, HENDERSON MJ, REGEN DM, PARK CR. Regulation of glucose uptake in heart muscle from normal and alloxan-diabetic rats: the effects of insulin, growth hormone, cortisone, and anoxia. Ann N Y Acad Sci 1998; 82:387-402. [PMID: 14424107 DOI: 10.1111/j.1749-6632.1959.tb44920.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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MESSER JV, WAGMAN RJ, LEVINE HJ, NEILL WA, KRASNOW N, GORLIN R. Patterns of human myocardial oxygen extraction during rest and exercise. J Clin Invest 1998; 41:725-42. [PMID: 14472965 PMCID: PMC290976 DOI: 10.1172/jci104531] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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REDFEARN ER. The role of ubiquinone (coenzyme Q) and its homologues in mediating the reduction of methylene blue by succinate in heart-muscle preparations. ACTA ACUST UNITED AC 1998; 53:581-3. [PMID: 14490934 DOI: 10.1016/0006-3002(61)90220-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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