Apex: Monitoring III cardiac rhythms
Questions with complete solution
2026/2027
anterior internodal tract - correct answer bachman bundle SA to AV node
middle internodal tract - correct answer wenckebach tract
SA to AV node
posterior internodal tract - correct answer thorel tract
SA and AV node conduction velocity - correct answer 0.02 - 0.1 m/s
Slow conduction
His bundle, bundle branches, and Purkinje fibers Conduction velocity - correct answer 1 - 4 m/s
Fast connection
Myocardial muscle cells conduction velocity - correct answer 0.3 - 1 m/s
Intermediate conduction
Conduction velocity is a function of: - correct answer Resting membrane potential
,Amplitude of the action potential
Rate of change in membrane potential during Phase 0
Conduction velocity is affected by: - correct answer ANS tone
Hyperkalemia
Ischemia
Acidosis
Anti-dysrhythmic drugs
James fiber accessory pathway - correct answer Atrium to AV node
Atrio-hisian fiber accessory pathway - correct answer Atrium to his bundle
Kent's bundle accessory pathway - correct answer Atrium to ventricle
Mahaim bundle accessory pathway - correct answer AV node to ventricle
Phase 0 - correct answer depolarization
, Sodium in
QRS
Phase 1 - correct answer initial repolarization
potassium out
chloride in
QRS
Phase 2 - correct answer plateau
potassium out
calcium in
ST segment
Phase 3 - correct answer final repolarization
potassium out
T wave
Questions with complete solution
2026/2027
anterior internodal tract - correct answer bachman bundle SA to AV node
middle internodal tract - correct answer wenckebach tract
SA to AV node
posterior internodal tract - correct answer thorel tract
SA and AV node conduction velocity - correct answer 0.02 - 0.1 m/s
Slow conduction
His bundle, bundle branches, and Purkinje fibers Conduction velocity - correct answer 1 - 4 m/s
Fast connection
Myocardial muscle cells conduction velocity - correct answer 0.3 - 1 m/s
Intermediate conduction
Conduction velocity is a function of: - correct answer Resting membrane potential
,Amplitude of the action potential
Rate of change in membrane potential during Phase 0
Conduction velocity is affected by: - correct answer ANS tone
Hyperkalemia
Ischemia
Acidosis
Anti-dysrhythmic drugs
James fiber accessory pathway - correct answer Atrium to AV node
Atrio-hisian fiber accessory pathway - correct answer Atrium to his bundle
Kent's bundle accessory pathway - correct answer Atrium to ventricle
Mahaim bundle accessory pathway - correct answer AV node to ventricle
Phase 0 - correct answer depolarization
, Sodium in
QRS
Phase 1 - correct answer initial repolarization
potassium out
chloride in
QRS
Phase 2 - correct answer plateau
potassium out
calcium in
ST segment
Phase 3 - correct answer final repolarization
potassium out
T wave
