#1
What is the normal resting heart rate for adults?
60-80 beats per minute
ExplanationNormal resting heart rate range.
#2
Which part of the heart initiates the heartbeat?
SA node (sinoatrial node)
ExplanationSA node initiates the heartbeat.
#3
What term is used to describe a cardiac rhythm with a heart rate greater than 100 beats per minute?
Tachycardia
ExplanationTachycardia is a heart rate greater than 100 bpm.
#4
Which of the following is NOT a component of the cardiac conduction system?
Pulmonary artery
ExplanationPulmonary artery is not a component of the cardiac conduction system.
#5
Which part of the heart is responsible for pumping oxygenated blood to the body?
Left ventricle
ExplanationLeft ventricle pumps oxygenated blood to the body.
#6
What does an ECG (electrocardiogram) measure?
Heart's electrical activity
ExplanationECG measures heart's electrical activity.
#7
What is the purpose of an artificial pacemaker?
To control heart rate and rhythm
ExplanationArtificial pacemaker controls heart rate and rhythm.
#8
What is the typical waveform associated with ventricular depolarization in an ECG (electrocardiogram)?
QRS complex
ExplanationQRS complex is associated with ventricular depolarization.
#9
Which of the following is a condition characterized by an abnormally slow heart rate, typically less than 60 beats per minute?
Bradycardia
ExplanationBradycardia is an abnormally slow heart rate.
#10
Which medication is commonly used to treat atrial fibrillation by controlling heart rate?
Digoxin
ExplanationDigoxin commonly treats atrial fibrillation by heart rate control.
#11
Which of the following is a type of abnormal heart rhythm characterized by rapid, irregular electrical signals in the atria?
Atrial fibrillation
ExplanationAtrial fibrillation is characterized by rapid, irregular atrial electrical signals.
#12
In cardiac pacing, what term describes the process of delivering an electrical impulse to the heart when the heart's intrinsic electrical activity fails to initiate or conduct impulses properly?
Capture
ExplanationCapture describes delivering an impulse when intrinsic activity fails.
#13
Which of the following is a potential complication associated with cardiac pacemaker insertion?
Pneumothorax
ExplanationPneumothorax is a potential complication of pacemaker insertion.
#14
Which of the following is a potential complication of untreated atrial fibrillation?
Stroke
ExplanationStroke is a potential complication of untreated atrial fibrillation.
#15
In cardiac electrophysiology, what term describes the process of terminating an abnormal heart rhythm using electrical energy?
Cardioversion
ExplanationCardioversion terminates abnormal rhythm with electrical energy.