EKG & Electrical Pathway of the Heart

The p-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 place where the electrical current starts and is considered the heart's pacemaker:

• Sino-atrial node 
• right atrium
• atria-ventricular node 
• left ventricle

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 AV node is located at...

• A
• B
• C
• D

The Purkinje fibers are located at...

• F
• G
• H
• I

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

• Aortic semilunar valve
• Pulmonary semilunar valve
• Bicuspid valve
• Mitral valve

For the repolarization phase of an SA nodal cell action potential,

• sodium and potassium channels open
• calcium channels open and sodium channels close
• calcium and potassium channels close
• calcium channels close and potassium channels open

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