Font size
WorksheetsIntro to Cardiac Cycle (Electrical Activity)
Total questions: 20
Worksheet time: 20mins
What do the letters EKG or ECG stand for?
Cardiac Ultrasound
An ECG or EKG measures what?
Cardiac blood flow.
Electrical impulses of the nervous system
Atria contracting
Ventricular contraction
Ventricular depolarization
Atria repolarization
Considered the pacemaker of the heart
(A in the image)
Sinoatrial node
right ventricle
atrioventricular node
Identify B in the image
Sinoatrial node
Interartial Pathway
atrioventricular node
Internodal pathway
Electrical activity from SA --> AV node
ventricle depolarization
Atrial contraction
The QRS-wave correlates with which event?
(multiple correct answers)
Blood leaving the atria, entering the ventricles
Ventricular depolarization
Atria repolarization
Signal passing along intranodal pathways
Blood retuning from the body and lungs
Reorder according to the cardiac conduction cycle pathway
SA Node --> Internodal & Interatrial pathways
AV Node
bundle of His
R & L Bundle branches
Purkinje Fibers
P wave is
Repolarization of atria
Repolarization of ventricles
Depolarization of atria
Depolarization of ventricles
T wave is
Repolarization of atria
Repolarization of ventricles
Repolarization of ventricles and atria
Depolarization of atria and ventricles
QRS complex is
Repolarization of atria
Repolarization of ventricles
Depolarization of atria
Depolarization of ventricles
The brain (nervous system) must initiate the heart to beat in order to have a normal, consistent (healthy) rhythm.
True
False
Where in the body does a normal healthy cardiac conduction cycle (electrical activity) start?
Right Atrium
Right Ventricle
Left Atrium
Left Ventricle
The Brain
Match the prompts with there corresponding part of the ECG wave
Ventricle depolarization (contraction)
QRS Complex
Ventricle repolarization (relaxation)
T Wave
Atrial depolarization (contraction)
P Wave
What is the function of the sinoatrial node in the heart?
To regulate blood flow to the body and lungs
To initiate the heartbeat
To slow down the heart beat
To regulate blood pressure
Which part of the ECG represents ventricular depolarization?
QRS complex
P wave
T wave
S wave
Which part of the heart is responsible for delaying the electrical impulse to allow the ventricles to fill with blood?
Bundle of His
Purkinje fibers
Atrioventricular node
Sinoatrial node
What is the primary function of the Purkinje fibers in the heart?
To slow down the heart rate
To initiate the heartbeat
To conduct electrical impulses to the ventricles
To regulate blood pressure
True/False: By evaluating the EKG, you can detect a cardiac arrhythmia
(an abnormal rhythm of the hear beat)
True
False
Yes, but only in humans
Not usually but maybe in certain species
Label the areas on the image
