Cardiovascular System - Electrical Events

The t-wave correlates with which event?

• atrium contraction /signals moving from SA node to AV node
• ventricle contraction
• ventricle repolarization
• both atrial and ventricle contraction

The QRS-wave correlates with which event?

• atrium contraction /signals moving from SA node to AV node
• ventricle contraction
• ventricle repolarization
• both atrial and ventricle contraction

What is the sequence of events in the transmission of an impulse through the heart muscle?
 a: AV node
 b: AV bundle
 c: SA node
 d: Through the atria
 e: Through the ventricles
 f: Bundle branches
 g: Purkinje fibers 

• d, b, a, c, f, g, e
  
  
• c, d, a, b, f, g, e
  
  
• b, a, d, c, f, g, e
  
  
• f, g, d, c, b, a, e
  
  

Order the phases an action potential travels in the conduction system

• SA node--> AV bundle branches--> AV node--> Purkinje fibers
• SA node--> AV node--> AV bundle branches-->  Purkinje fibers
• Av bundle branches--> AV node--> SA node--> Purkinje fibers
• Purkinje fibers--> SA node--> AV node--> AV bundle branches

The role of the atrioventricular node (AV node) is to

• initiate a sinus rhythm
• conduct impulses to the sinoatrial node (SA node)
• initiate ventricular depolarization
• slow down impulses so that the atria can contract to fill the adjacent ventricles with blood

The P wave of an ECG represents

• atrial repolarization
• atrial depolarization
• ventricular repolarization
• ventricular depolarization

If the heart is beating too fast, it might be indicative of this condition: 

• Brachycardia
• Tachycardia
• Congestive Heart Failure
• Heart Murmurs

Tags

NGSS.HS-LS1-3

If all therapies are available and ready for use, which would be the priority intervention for this rhythm?

• Epinephrine
• Vasopressin
• Cardioversion
• Defibrillation

What is wrong with this strip?

• Tachycardia
• Elevated ST segment
• No P wave
• Wide QRS complex

If the p-wave is "quivering" what medical condition is occurring? 

• Myocardial infarction 
• Damaged AV valves 
• Hyperkalemia 
• Atrial fibrillation (Afib)