Effects of Surgery Under General Anaesthesia on the Electrocardiogram in Ischaemic Heart Disease and Hypertension

Eighty-one psychotic (" endogenous ") depressions were studied to determine the mode of onset of the symptoms, using a graphic method. Four patterns emerged from this investiga- tion: (1) sudden onset (1 1); (2) gradual onset (50) ; (3) neurotic onset (14) ; and (4) fluctuating onset (6).