What are the procedures a medical staff does when a patient goes into cardiac arrest?

I'm writing a short story and I'm stuck on this one part. I'm not familliar with medical terminology, but the patient in my story goes into cardiac arrest and I'm just wondering what a medical staff would be doing to try to save the patients life? How many people are generally in the room? What kind of medical staff would need to be on hand (for example, how many nurses would be assisting what doctors, and what would each one be doing? Are they injecting him with needles? Are they using a crash cart?) What would be the sounds of the room, would people be in a panic, would it be busy and hectic? And what type of machines would they be using? I was to be as accurate as possible, so using medical terminologies (with proper explaination) would be greatly appreciated!

I can only speak from experience from working in a hospital. When a patient goes into cardiac arrest, the nurse who notices this happening presses an emergency button which has nurses running from everywhere in the ward. From there, a crash cart will be brought into the room where CPR has begun on the patient. One of the nurses will also bring in a dynomap (or observation machine) to get a reading of a person's blood pressure, heart rate and oxygen saturation. In the mean time, someone would have called a code and a team of specialist nurses and doctors come to the scene. There are mainly 2 ICU nurses and 2 doctors - every place does it a little differently. Immediately they will ask when was the patient found in this condition and what precipitated it. Whilst this is going on, if the patient is located in anything but a single room, the other patient's curtains are drawn and one or two nurses will go around to each of these patients to calm them, make general converstaion, and essentially try to make sure they are ok. On more than one occasion have patients witnessing a cardiac arrest been so terrified that they themselves have an arrest. The ICU nurse will attach electrodes to the coding patient and hook up a defibrillator which measures the heart rhythm. If needed, adrenaline will be administered under the Doctor's orders before being shocked by the defib. This is to try and return the heart to a 'normal' rhythm. A defib machine will also tell you if the person is in atrial or ventricular fibrillation. Whilst this is going on, another nurse (usually from the ward) documents EVERYTHING that happens and what time it happens. The Doctor overlooking this emergency will tell the nurse what the next course of action is. If the patient survives, they are transferred to ICU. If the person is not responsive for a period of time and it is clear that the person will not be revived, the Doctor will ask each individual involved whether they agree to the efforts being stopped. Everyone must be in totally agreeance, or the efforts continue.

Hope this helps.

watch ER for when a patient is crashing and they call a Code Blue

pretty realistic