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- W1933628032 abstract "The effect of diltiazem on ischemic myocardial acidosis was studied in the canine heart whose left anterior descending coronary artery was partially occluded to reduce coronary flow to about one-third (partial occlusion). Myocardial pH was measured by use of a micro glass pH electrode. The pH decreased from 7.53 to 6.93 by partial occlusion and appeared to reach a steady state within 30 min. Saline or drugs were injected i.v. 30 min after partial occlusion. The decreased pH increased spontaneously by 34% of the total reduction of pH in the next 60 min after saline injection. Diltiazem (100 micrograms/kg) potentiated the increase in pH; the pH increased by 76% 60 min after the injection. Propranolol (1 mg/kg) also potentiated the increase in pH that had been decreased by partial occlusion. The relation between pH decrease and the tissue levels of metabolites was also studied. The reduction of myocardial pH from 7.5 to 6.8 was accompanied by a 2-fold increase in the tissue lactate content and by decreases in the ATP and creatine phosphate contents. There was a significant correlation between the hydrogen ion concentration calculated from the pH and each of the lactate, ATP and creatine phosphate contents. The present study indicates that diltiazem attenuates ischemic myocardial acidosis." @default.
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- W1933628032 date "1982-09-01" @default.
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- W1933628032 title "Effect of diltiazem, a calcium antagonist, on myocardial pH in ischemic canine heart." @default.
- W1933628032 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/6286933" @default.
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