Studies on the Coronary Circulation by Means of the Coronary Artery Catheterization (2) : THE RELATIONSHIP BETWEEN THE CORONARY FLOW AND ELECTROCARDIOGRAM
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The Relationship between the coronary flow and the electrocardiogram was studied by artificially changing the coronary flow through the coronary arterial catheter in dogs, without opening the chest. When the coronay flow was reduced to from 69.0% to 23.8% of the initial level, the electrocardiographic changes appeared chiefly in the S-T segment or the T wave, and they were dependent upon the degree, and duration of the artificial reduction of the coronary flow, and limited principally to the leads oriented towards the catheter-perfused area. When the base line electrocardiogram was normal or changed only slightly, the electrocardiogram showed considerable resistance against the reduction in the coronary flow. The S-T depression or decrease of the T wave in amplitude was produced by the reduction in the coronary flow and it was not so progressive under the maintained low coronary flow. When the coronary flow was restored to its initial level, the electrocardiogram, once changed, returned to the base line state. When the base line electrocardiogram was moderately or severely changed one, the electrocardiographic changes caused by the reduction in the coronary flow were complicated. The S-T elevation, the high T wave and the decrease of the QRS complex in amplitude were produced in addition to the above described changes of the S-T segment and the T wave. They were progressive and did not return to the initial state within 5 minutes, when the coronary flow was restored to the initial or a little above this level. When the coronary flow was reduced gradually, the electrocardiogram was considerably resistant against the reduction of the coronary flow and the electrocardiographic changes were not so progressive. The electrocardiographic changes were marked and progressive, when the coronary flow was reduced rapidly.
- 社団法人日本循環器学会の論文
- 1960-03-20
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関連論文
- Studies on the Coronary Circulation by Means of the Coronary Artery Catheterization (I) : THE RELATIONSHIP BETWEEN THE MYOCARDIAL CONTRACTION AND CORONARY FLOW
- Studies on the Coronary Circulation by Means of the Coronary Artery Catheterization (2) : THE RELATIONSHIP BETWEEN THE CORONARY FLOW AND ELECTROCARDIOGRAM