#1
What does ECG stand for?
Electronic Cardiovascular Graph
Electrocardiogram
Electrocardiography
Electrocardiac Generator
#2
Which of the following is NOT a risk factor for cardiovascular disease?
Smoking
Regular exercise
High blood pressure
Obesity
#3
Which of the following represents a normal sinus rhythm on an ECG?
P wave preceding each QRS complex
Absence of T waves
Prolonged PR interval
Absent QRS complexes
#4
What is the purpose of telemetry in cardiovascular monitoring?
To record brain activity
To measure lung function
To monitor heart activity remotely
To track digestive system activity
#5
Which part of the heart's conduction system is primarily responsible for initiating the heartbeat?
Atrioventricular node (AV node)
Purkinje fibers
Sinoatrial node (SA node)
Bundle of His
#6
Which lead placement is commonly used for a standard 12-lead electrocardiogram (ECG)?
Right leg
Left arm
Chest
Left leg
#7
What does the T wave represent in an ECG?
Ventricular depolarization
Atrial repolarization
Atrial depolarization
Ventricular repolarization
#8
Which medication is commonly used to treat supraventricular tachycardia?
Aspirin
Epinephrine
Adenosine
Nitroglycerin
#9
What is the typical duration of a normal PR interval on an ECG?
Less than 0.12 seconds
Between 0.12 and 0.20 seconds
More than 0.20 seconds
Varies significantly between individuals
#10
What does ST segment elevation on an ECG indicate?
Myocardial infarction (heart attack)
Low potassium levels
Hypercalcemia
Atrial fibrillation
#11
What is the significance of the QRS complex on an ECG?
Represents atrial depolarization
Represents ventricular repolarization
Indicates the duration of ventricular depolarization
Indicates the duration of atrial repolarization
#12
Which condition is associated with a prolonged QT interval on an ECG?
Ventricular fibrillation
Ventricular tachycardia
Torsades de pointes
Brugada syndrome
#13
Which waveform represents atrial repolarization on an ECG?
P wave
QRS complex
T wave
U wave
#14
Which of the following is NOT a common cause of ST segment depression on an ECG?
Myocardial ischemia
Hypokalemia
Hypoxia
Bundle branch block
#15
Which condition is characterized by a rapid, irregular heartbeat originating from the atria?
Ventricular fibrillation
Atrial fibrillation
Ventricular tachycardia
Supraventricular tachycardia
#16
Which electrolyte imbalance is most commonly associated with Torsades de pointes?
Hyperkalemia
Hypokalemia
Hypermagnesemia
Hypomagnesemia