Method I. A Hiirthle membrane manometer in which the lever was replaced by a platinum
wire 5 cm. long, was inverted and connected with a carotid artery low in the neck. As the …

METHODS. Dogs 10 to 20 kilos in weight were anesthetized with morphine and sodium
barbital and under mild artificial respiration the heart was exposed and rested in a pericardial …

… The movements of the latter are communicated either directly to a lever (Roy, Cushny) or
through a transmission system to a recording tambour (Wiggers). The latter has the advantage …

The problem of shock has been the subject of much speculation largely because there appear
to be no pathognomonic signs of impending shock and even today, a full understanding …

… pressure was recorded by a Wiggers optical manometer. In order to introduce shocks at
appropriately timed portions of late systole, a condenser discharge was released by the aid of a …

Ventricular fibrillation, which is a common cause of sudden death following anesthesia,
coronary occlusion, electric shock, etc., cannot be adequately described as an asynchronous, …

In several recent communications from this laboratory (I),(2),(3) evidence was presented to
show that, under varying conditions, the duration of the ejection phase is modified by factors …

… Wiggers, MD … Wiggers, MD … Wiggers, MD …

METHODS An analysis of the consecutive phases of the cardiac cycle can be most
successfully accomplished by a study of pressure curves optically recorded from the cardiac …

… also Wiggers, 256). Since the tonus of respiratory muscles, upon which the magnitude of …
However, the question cannot be settled by such CJ priori considerations because the …