| 释义 |
vectorˈcardiogram Med.
[f. vector n. + cardiogram s.v. cardio-.]
An electrocardiogram (usu. a photograph of an oscilloscope display) that represents the directions as well as the magnitudes of electric currents in the heart.
1938Wilson & Johnston in Amer. Heart Jrnl. XVI. 15 In 1920 Mann..constructed a number of curves of this kind and called them monocardiograms. Granting the priority of this name, we prefer to call them vectorcardiograms in order to emphasize the true nature of the difference..between them and ordinary electrocardiographic curves, which are scalar functions of the time.
Hence ˌvectorcardiˈography, the practice or technique of obtaining and interpreting vectorcardiograms.
1946Brit. Heart Jrnl. VIII. 160 (heading) Possible application to vector-cardiography. 1976Lancet 18 Dec. 1339/1 A parallel science of vectorcardiography grew up in specialist centres, in which cardiac currents were studied on oscilloscopes in more than one dimension at a time and with leads and electrodes appropriate to three orthogonal or right-angled axes. |