⚡ Zap to the Future
The heart is considered this type of pump because it relies on electrical impulses.
What is an electrical pump?
This node is known as the heart's natural pacemaker.
What is the SA node?
Dysrhythmias occurring in the lower chambers are called these.
What are ventricular dysrhythmias?
This Class III antidysrhythmic blocks potassium channels
What is amiodarone?
This procedure destroys dysrhythmogenic tissue using heat energy.
What is radiofrequency catheter ablation?
These specialized tissues generate and conduct electrical impulses.
What is contractile tissue?
This property allows the heart to generate its own electrical impulses.
What is automaticity?
Dysrhythmias occurring above the ventricles are called these.
What are supraventricular dysrhythmias?
Lidocaine belongs to this drug class
What are Class IB sodium channel blockers?
This implanted device senses and corrects dangerous rhythms with electrical therapy.
What is an implantable defibrillator (ICD)?
The four events of a heartbeat are stimulation, transmission, contraction, and this.
What is relaxation?
This property allows heart cells to respond to an electrical stimulus.
What is excitability?
An impulse that originates somewhere other than the SA node comes from this.
What is an ectopic focus?
Diltiazem belongs to this antidysrhythmic class.
What are Class IV calcium channel blockers?
These implanted devices help maintain an appropriate heart rate.
What are pacemakers?
Electrical impulses normally begin in this structure.
What is the SA node?
During this period, cardiac cells cannot respond to another stimulus.
What is the absolute refractory period?
This condition is most likely to activate an ectopic focus?
What is hypoxia?
This beta blocker is classified as a Class II antidysrhythmic.
What is propranolol?
Five medications commonly used during adult resuscitation include oxygen, epinephrine, atropine, lidocaine, and this.
What is calcium chloride?
The impulse pauses here before traveling to the ventricles.
What is the AV node?
Sodium and this ion movement initiate cardiac impulses.
What is potassium?
Dysrhythmias result from problems with impulse formation, conduction, or both.
What are electrical impulse abnormalities?
The three main actions of antidysrhythmics are reducing automaticity, slowing conduction, and prolonging this.
What is the refractory period?
Modern dysrhythmia management often favors these treatments because antidysrhythmic drugs can worsen arrhythmias or increase mortality.
What are nonpharmacologic therapies?