Final answer:
In PEA, there is no dose to give as it requires identification and treatment of the underlying cause. CPR and advanced life support measures such as potential use of epinephrine and atropine are the mainstay treatments. Defibrillation is not effective for PEA but is used to treat ventricular fibrillation or pulseless ventricular tachycardia.
Step-by-step explanation:
For Pulseless Electrical Activity (PEA), there is no standard dose of medication that can reverse the condition since PEA reflects a condition where the heart's electrical activity is present but the heart is not providing an effective pulse or blood flow. The underlying cause of PEA must be identified and treated promptly. In cases of cardiac emergencies, Automated External Defibrillators (AED) can be used to assess heart rhythm and deliver an electrical shock, if necessary. However, in the case of PEA, defibrillation is not indicated; instead, focus is on CPR (cardiopulmonary resuscitation) and possible administration of epinephrine and atropine, as guided by advanced life support protocols.
Defibrillation is the delivery of a large electrical charge to the heart, which is primarily indicated for the treatment of ventricular fibrillation or pulseless ventricular tachycardia. This is used to attempt to reset the heart's rhythm to a normal pattern by pausing the heart's electrical activity briefly, hoping the body's natural pacemaker will take over. In the absence of a normal heart rhythm, as is seen in PEA, the heart rate or pulse would be non-existent, thus requiring immediate medical intervention for any chance of restoring effective circulation and a palpable pulse.