rate, pattern, breath sounds, presence of cough, airway pressure, and oxygen saturation(5). At the immediate post-operative period, patient may suffer from deceased cardiac output related to hypovolemia associated with surgical blood loss and persistent bleeding post-operatively; excessive loss of fluids resulting from nasogastric tube drainage, vomiting, and diuretic therapy associated with decreased fluid intake, medication therapy (e.ganesthetic, narcotics), rapid body warming following surgery and implement measures to maintain adequate cardiac output by performing actions to reduce cardiac workload .(6). For evaluating hydration status for the child after open-heart surgery, it is important to measure hematocrit, serum sodium, pulmonary capillary wedge pressure, intake, output, skin turgor. (7). Monitor for potential signs of infection because infection after open heart surgery causes a potential hazards upon the physiological functions of the heart as well as monitoring the adequacy of nutritional support reflecting the patient's stability after operation, maintaining homeostasis within the body after open heart surgeries by electrolytes, because they help to regulate myocardial and neurological function, fluid balance, oxygen delivery, acid base balance, and electrolyte imbalance causes excessive ingestion or diminished elimination of an electrolyte or diminished ingestion/excessive elimination of an Electrolyte . (8) .