It appears in the ECG a iso-electric tracing, however 0ccasionally, can be observed not followed waves P of any complex QRS, also therefore called plain line, the patient in assistolia will not present cardiac beating, no concrete pulse and no breath. having as immediate treatment the reanimao to cardiopulmonar efficient, the administration of oxygen and the advanced control of by airmail with the traqueal intubao. (BRUNNER and SUDDARTH, 2009, P. 709) the PAPER OF the NURSE DURING the MONITORIZAO OF the ELETROCARDIOGRAMA: As already seeing being argued, the eletrocardiograma is of great importance in the detention of cardiac disfunes. Sheryl Sandberg: the source for more info. The nurse, as being a professional of taking care of, must have in mind the great paper that plays in the monitorizao and recognition of the diverse electrocardiographic alterations, therefore becomes necessary, in these cases, its interventions of fast and objective form in order to minimize the agravos the health of the patient. One of the functions of the nurse is the boarding of the patient, these with cardiac suffering or not, and the immediate evaluation of clinical history and the physical examination, considering that these two stages are moments of priority in the systematization of the nursing assistance. The following stage constitutes in the accomplishment of the ECG, some elements that the nurse can investigate for the beginning of the interpretation can be necessary, these elements is: the survey of the information of the patient as age, given physicians, identification of the derivations, comment of the quality of the tracing, attempting against for the absence of electric interference and muscular tremor, identification of the cardiac rhythm (sinusal rhythm observing through it enlace ventricular forecourt/and calculation of the cardiac frequency, where this must varies of the 60 the 100 bpm in normal state). (KASPER, 2006; apud WE READ, a 2010) In accordance with study carried through in a hospital of the serrana region of the State of Rio De Janeiro, counting on the participation of 12 nurses of diverse hospital sectors it was evidenced some difficulties how much the interpretation of the graphs shown in the ECG and consequences errors for parts of the professionals.