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- W2120785023 abstract "Twenty-four hours after occlusion of the left anterior descending coronary artery in the dog, ventricular tachycardia is the predominant rhythm. At this time, records of transmembrane potentials from the subendocardial Purkinje fibers adjacent to the infarct show a low maximum diastolic potential, prominent phase 4 depolarization, and slow response action potentials. Exposure of the fibers to pinacidil, 25-100 microM, increases resting potential to the estimated value of EK, abolishes the phase 4 depolarization, and restores action potential amplitude and Vmax toward normal. Perfusion of the bed of the occluded coronary artery with Tyrode's solution prior to isolation of the subendocardial tissues results in similar normalization of transmembrane potentials. These findings indicate: (a) that the major cause of the abnormal transmembrane potentials of the subendocardial tissues is the loss of resting potential; and (b) that abnormalities of the transmembrane potentials are caused by some substance that can be washed out by perfusion and not by a direct effect of ischemia." @default.
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- W2120785023 date "1994-11-01" @default.
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- W2120785023 title "Reversibility of Electrophysiological Abnormalities in Subacute Ischemia" @default.
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- W2120785023 doi "https://doi.org/10.1111/j.1540-8159.1994.tb03807.x" @default.
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