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VF / Pulseless VT Practice Test

VF and Pulseless VT are shockable rhythms True False VF and Pulseless VT represent shockable rhythms. The left side of the Adult Cardiac Arrest Algorithm should be followed to treat. AHA Advanced Cardiovascular Life Support Provider Manual, p. 94 If the initial shock terminates VF but the arrhythmia recurs later in the resuscitation: Deliver subsequent shocks at the maximum energy dose Deliver subsequent shocks at the previously successful energy level Do not deliver any subsequent shocks and continue CPR Begin cardioversion If the initial shock terminates VF but the arrhythmia recurs later in the resuscitation attempt, deliver subsequent shocks at the previously successful energy level. AHA Advanced Cardiovascular Life Support Provider Manual, p. 96 For every minute that passes between collapse and defibrillation, how much does the chance of survival decrease from a witnessed VF sudden cardiac arrest if no bystander CPR is provided? 7% to 10% 3% to 4% 25% to 30% 50% to 60% For every minute that passes between collapse and defibrillation, the chance of survival from a witnessed VF sudden cardiac arrest declines by 7% to 10% per minute if no bystander CPR is provided. When bystanders perform CPR, the decline is more gradual and averages 3% to 4% per minute. CPR performed early can double or triple survival from sudden cardiac arrest at most defibrillation intervals. AHA Advanced Cardiovascular Life Support Provider Manual, p. 97 Pulse checks should: Performed every 50 cycles of CPR Be performed during rhythm analysis, only if an organized rhythm is present Take at least 15 seconds to ensure accuracy Give the rescuer enough information to treat the victim Perform a pulse check-preferably during rhythm analysis-only if an organized rhythm is present. AHA Advanced Cardiovascular Life Support Provider Manual, p. 99 What is the first-line antiarrhythmic agent given in cardiac arrest? Magnesium sulfate Lidocaine Epinephrine Amiodarone Amiodarone is the first-line antiarrhythmic agent given in cardiac arrest because it has been clinically demonstrated that it improves the rate of ROSC and hospital admission in adults with refractory VF/pulseless VT. AHA Advanced Cardiovascular Life Support Provider Manual, p. 100 Defibrillation restarts the heart True False Defibrillation does no restart the heart. Defibrillation stuns the heart and briefly terminates all electrical activity, including VF and pVT. If the heart is still viable, its normal pacemakers may eventually resume electrical activity that ultimately results in a perfusing rhythm. AHA Advanced Cardiovascular Life Support Provider Manual, p. 96 If using a biphasic defibrillator and the recommended dosage is not known: Do not shock until the recommended dose has been identified Shock using the minimum energy dose available Shock using a 360 J energy dose Shock using the maximum energy dose available If you do not know the effective dose range of a biphasic defibrillator, deliver the maximal energy dose for the first and all subsequent shocks. AHA Advanced Cardiovascular Life Support Provider Manual, p. 96 The proper dosing of epinephrine for VF/pVT is: 1 mg IV/IO - repeated every 3 to 5 minutes 300 mg IV/IO bolus 1 to 2 g IV/IO diluted in 10 mL saline over 5 to 20 minutes 0.5 to 0.75 mg/kg IV/IO Administer 1 mg IV/IO, repeated every 3 to 5 minutes. AHA Advanced Cardiovascular Life Support Provider Manual, p. 99 Epinephrine is used during resuscitation: Because it causes vasoconstriction To stop allergic reactions causing heart failure As a pain reliever for the victim Because it is an antiarrhythmic Epinephrine hydrochloride is used during resuscitation primarily for its beta-adrenergic effects, ie, vasoconstriction. AHA Advanced Cardiovascular Life Support Provider Manual, p. 99 The chest compression fraction should be: As high as possible At least 50% Lower than 25% Lower than 60% Chest compression fraction is the proportion of time during cardiac arrest resuscitation when chest compressions are performed. CCF should be as high as possible: at least 60% and ideally greater than 80%. AHA Advanced Cardiovascular Life Support Provider Manual, p. 92