#1
Which of the following is not a cardiac conduction system component?
Atrioventricular (AV) Node
Bundle of His
Purkinje Fibers
Sinoatrial (SA) Valve
#2
The Bundle of His is responsible for:
Initiating the electrical impulse
Conducting the electrical impulse to the atria
Delaying the electrical impulse
Conducting the electrical impulse to the ventricles
#3
Which part of the heart's conduction system is primarily responsible for setting the heart's rhythm?
Sinoatrial (SA) Node
Atrioventricular (AV) Node
Bundle of His
Purkinje Fibers
#4
Which of the following is not a common symptom of cardiac conduction abnormalities?
Chest pain
Dizziness or fainting
Shortness of breath
Muscle weakness
#5
What is the normal heart rate range in an adult?
60-80 beats per minute
100-120 beats per minute
140-160 beats per minute
180-200 beats per minute
#6
A prolonged PR interval on an ECG indicates:
Atrial fibrillation
Heart block
Ventricular tachycardia
Supraventricular tachycardia
#7
Which electrolyte imbalance can predispose a person to cardiac conduction abnormalities?
Hyperkalemia
Hyponatremia
Hypercalcemia
Hypokalemia
#8
The term 'heart block' refers to a condition where:
Blood flow to the heart is obstructed
There is a delay or interruption in the normal electrical conduction of the heart
The heart muscle is weakened
There is a clot in one of the coronary arteries
#9
What is the term for an abnormal heart rhythm originating from the ventricles rather than the atria?
Atrial fibrillation
Ventricular fibrillation
Supraventricular tachycardia
Ventricular tachycardia
#10
What is the typical ECG finding in atrial fibrillation?
Regular rhythm with absent P waves
Irregular rhythm with normal P waves
Regular rhythm with normal P waves
Irregular rhythm with absent P waves
#11
Which condition is characterized by an abnormally slow heart rate?
Tachycardia
Bradycardia
Atrial fibrillation
Ventricular fibrillation
#12
What is the characteristic ECG finding in Wolff-Parkinson-White syndrome?
Prolonged QT interval
Shortened PR interval
Absent P wave
Delta wave
#13
Which of the following ECG findings is characteristic of third-degree atrioventricular (AV) block?
Shortened PR interval
Prolonged QRS complex
Variable PR interval with no relationship between P waves and QRS complexes
Absent P waves
#14
What term describes the condition where the heart's electrical impulses are disorganized, leading to ineffective pumping?
Atrial fibrillation
Ventricular fibrillation
Ventricular tachycardia
Supraventricular tachycardia
#15
What is the most common cause of ventricular fibrillation?
Hyperkalemia
Hypokalemia
Myocardial infarction
Atrial fibrillation
#16
Which condition is characterized by an abnormal electrical pathway between the atria and ventricles, leading to rapid heart rates?
Bundle branch block
Ventricular tachycardia
Wolff-Parkinson-White syndrome
Atrial fibrillation
#17
What is the term for an ECG finding characterized by a widened QRS complex and peaked T waves, often seen in hyperkalemia?
Osborn wave
Delta wave
QRS prolongation
U wave
#18
Which condition is characterized by a sudden, rapid, irregular heart rate originating from the ventricles?
Atrial fibrillation
Atrial flutter
Ventricular fibrillation
Ventricular tachycardia