抄録
Ten cases of pure mitral stenosis were studied by Frapk system VCG and the following results were obtained, QRS maximum vectors were inscribed to right inferiorly in the three cases of ten and left inferiorly in the seven cases of ten.
T maximum vectors were inscribed to left inferiorly in most of the cases as normal.
Efferent half protrusion of QRS loop to the right posterior direction was noted in most of the cases.
The direction of QRS loop inscription was normal in all of the cases and T loop inscription was retrograde to QRS in a few cases.
QRS angle was large in frontal plane, showing right ventricular hypertrophy, in the cases of which pulmonary artery oxygen saturation was under seventy per cent.
Vector loops inscribed the almost normal configuration from one to two months after operation, showing the increase of QRS/T ratio and the decrease of QRS, T angle.
