Tachycardia Practice Test (ACLS)

Tachycardia Practice Test (ACLS) Tachycardia is defined as: A. An arrhytmia with a rate greater than 150/min B. An arrhytmia with a rate greater than 100/min C. Any rhythm disorder with a heart rate less than 60/min ...

Tachycardia Practice Test (ACLS) Tachycardia is defined as: A. An arrhytmia with a rate greater than 150/min B. An arrhytmia with a rate greater than 100/min C. Any rhythm disorder with a heart rate less than 60/min D. An organized rhythm without a pulse - ✔✔B. An arrhytmia with a rate greater than 100/min Synchronized cardioversion is recommended for:: A. Monomorphic VT in a stable patient B. Pulseless rhythms C. Unstable SVT D. Polymorphic VT - ✔✔C. Unstable SVT Synchronized shocks are recommended for patients with: Unstable SVT Unstable atrial fibrillation Unstable atrial flutter Unstable regular monomorphic tachycardia with a pulse What is the correct energy dose for unstable atrial fibrillation when delivering monophasic synchronized shocks? A. 50 to 100 J B. 100 J C. Treat with high-energy shocks (defibrillation doses) D. 200 J - ✔✔D. 200 J AV nodal blocking agents should be avoided in: A.Patients with a regular SVT B.Patients with a regular VT C.Patients with an irregular wide-complex tachycardia D.All of the above - ✔✔C.Patients with an irregular wide-complex tachycardia Avoid AV nodal blocking agents such as adenosine, calcium channel blockers, digoxin, and possible betat-blockers in patients with pre-excitation atrial fibrillation, because these drugs may cause a paradoxical increase in the ventricular response Which drug is the preferred intervention for terminating narrow-complex tachycardias that are symptomatic (but stable) and supraventricular in origin (SVT)? A. Epinephrine B. Amiodarone C. Atropine D. Adenosine - ✔✔D. Adenosine Vagal maneuvers and Adenosine are the preferred intervention for terminating narrow-complex tachycardias that are symptomatic (but stable) and supraventricular in origin (SVT). Adenosine should not be given to: A. Patients with asthma B. Pregnant women C. Patients with SVT D. Patients with a narrow QRS with regular rhythm - ✔✔A. Patients with asthma Adenosine may cause bronchospasm; therefore, adenosine should generally not be given to patients with asthma or chronic obstructive pulmonary disease. If SVT does not respond to vagal maneuvers, how much adenosine do you give: A. 20mL rapid IV push B. 12 mg rapid IV push C. 6 mg IV push over 10 seconds D. 6mg rapid IV push over 1 second - ✔✔D. 6mg rapid IV push over 1 second Give adenosine 6 mg as a rapid IV push in a large (eg, antecubital) vein over 1 second. Follow with a 20 mL saline flush and elevate the arm immediately. Which of the following statements is not true? A. Sinus tachycardia is a heart rate that is greater than 100/min and is generated by sinus node discharge B. Sinus tachycardia is caused by cardiac conditions C. In sinus tachycardia, the goal is to identify and treat the underlying systemic cause. D. Cardioversion is contraindicated in Sinus Tachycardia - ✔✔B. Sinus tachycardia is caused by cardiac conditions Sinus tachycardia is caused by external influences on the heart. These are systemic conditions, not cardiac conditions. Vagal maneuvers alone will terminate about what percentage of SVTs? A. 25% B. 90% C. 75% D. 50% - ✔✔A. 25% Vagal maneuvers alone (Valsalva maneuver or carotid sinus massage) will terminate about 25% of SVTs. Adenosine is required for the remainder. End points for the administration of procainamide include: A. Hypotension B. Duration of QRS increases by 25% C. Maximum dose of 7 mg/kg is reached D. Increase in heart rate by 30 points - ✔✔A. Hypotension Procainamide can be administered to suppress wide-complex tachycardias except in patients displaying hypotension, a QRS increase of 50%, or the maximum dose of 17 mg/kg is met.