<原著>100%酸素吸入による冠疾患患者の左心室外壁の短縮について

概要

論文の詳細を見る
The change of left ventricular size following oxygen breathing was investigated in order to know whether oxygen breathing might reduce myocardial oxygen demand by reducing left ventricular size. In 11 patients with old myocardial infarction or angina pectoris, routine diagnostic biplane left coronary cineangiograms were obtained during air and 100% oxygen breathings. The coordinates of the points (x, y, z) on the left coronary artery were measured frame by frame covering one cardiac cycle and the spatial distance between any selected two points (segment length ; L) was calculated using a computer. The segment length at R wave of electrocardiogram (L_<ECG R>) and the minimum value of the segment length (L_<min>) during one cardiac cycle at each segment length were measured during air and oxygen breathings. L_<ECG R> was reduced from 62.3±20.2 to 60.6±20.3 mm by oxygen breathing indicating that the left ventricular size at end-diastole is reduced by oxygen breathing. L_<min> was also reduced from 55.9±19.0 to 54. 4±19.3 mm by oxygen breathing indicating that the left ventricular size at end-systole is reduced. This reduction of left ventricular size might reduce left ventricular tension, reduce myocardial oxygen demand and thus might be effective in the treatment of ischemic myocardium when oxygen inhalation was applied.
近畿大学の論文
1981-06-25