[Polygraphic changes in relation to active and passive upright position after myocardial infarct]

In 33 patients on the 15th day after the onset of myocardial infarct, without complications, the effects of active and passive gravitational stress on left ventricular efficiency were studied by measuring systolic intervals. It is concluded that the semivertical passive position means an unfavourable course for left ventricular dynamism wompared with thehorizontal position and that active rising, from this point of view, can be considered more physiological than passive rising.