#1
Which of the following represents a normal sinus rhythm on an ECG?
P wave inverted in lead II
P wave before each QRS complex
Absent P wave
QRS complex after each P wave
#2
What is the typical heart rate range for sinus tachycardia?
Less than 60 beats per minute
60-100 beats per minute
100-150 beats per minute
Greater than 150 beats per minute
#3
Which ECG lead placement is used to assess for right ventricular infarction?
Lead I
Lead II
Lead V1
Lead V6
#4
Which ECG lead is commonly used to detect ST-segment changes indicative of myocardial ischemia?
Lead I
Lead II
Lead V1
Lead V4
#5
Which ECG lead is commonly used to diagnose posterior wall myocardial infarction?
Lead I
Lead II
Lead V1
Lead V4R
#6
What is the term for a delay in the electrical conduction between the atria and ventricles?
Bradycardia
Tachycardia
Bundle branch block
Heart block
#7
Which ECG finding is characteristic of atrial fibrillation?
Regular rhythm with narrow QRS complexes
Sawtooth-shaped baseline between QRS complexes
Absence of P waves
Wide QRS complexes
#8
Which ECG lead is commonly used to diagnose myocardial infarction?
Lead I
Lead II
Lead V1
Lead V6
#9
What is the term for an abnormally slow heart rate?
Bradycardia
Tachycardia
Atrial fibrillation
Supraventricular tachycardia
#10
What does the PR interval on an ECG represent?
Time taken for atrial depolarization
Time taken for ventricular depolarization
Time taken for atrial repolarization
Time taken for ventricular repolarization
#11
Which arrhythmia presents with a 'sine wave' pattern on ECG and is considered a medical emergency?
Ventricular tachycardia
Ventricular fibrillation
Atrial flutter
Supraventricular tachycardia
#12
What does the QRS complex represent on an ECG?
Atrial depolarization
Atrial repolarization
Ventricular depolarization
Ventricular repolarization
#13
Which arrhythmia is characterized by irregularly irregular rhythm and absence of distinct P waves?
Ventricular tachycardia
Atrial fibrillation
Atrial flutter
Supraventricular tachycardia
#14
What is the typical appearance of Torsades de pointes on an ECG?
Sinus rhythm
Prolonged QT interval with twisting of QRS complexes
Absence of QRS complexes
Sawtooth pattern in the baseline
#15
Which arrhythmia is often associated with a 'sawtooth' appearance of the atrial waves?
Atrial fibrillation
Atrial flutter
Ventricular fibrillation
Sinus tachycardia
#16
Which electrolyte imbalance is associated with a prolonged QT interval on ECG?
Hyperkalemia
Hypokalemia
Hypercalcemia
Hypermagnesemia
#17
Which ECG finding is characteristic of ventricular tachycardia?
Absence of QRS complexes
Heart rate > 100 beats per minute
Tall, peaked T waves
Wide, bizarre QRS complexes
#18
Which ECG finding is characteristic of Wolff-Parkinson-White (WPW) syndrome?
Prolonged PR interval
Delta wave
Sawtooth-shaped baseline
Absent QRS complex
#19
In which condition would you typically find a 'sawtooth' pattern on an ECG?
Ventricular fibrillation
Atrial fibrillation
Atrial flutter
Sinus rhythm
#20
What does a peaked T wave indicate on an ECG?
Hyperkalemia
Hypokalemia
Hypercalcemia
Hypermagnesemia
#21
Which ECG finding is characteristic of complete heart block?
P waves before each QRS complex
Regular rhythm with narrow QRS complexes
Absence of P waves
Prolonged PR interval with dropped beats
#22
What is the most common cause of a widened QRS complex on an ECG?
Hyperkalemia
Hypokalemia
Hypercalcemia
Hypocalcemia
#23
Which ECG finding suggests an anterior wall myocardial infarction?
ST-segment elevation in leads II, III, and aVF
ST-segment elevation in leads V1-V4
ST-segment depression in leads V1-V4
ST-segment elevation in leads V5-V6
#24
Which electrolyte abnormality is associated with U-wave appearance on an ECG?
Hyperkalemia
Hypokalemia
Hypercalcemia
Hyponatremia
#25
What ECG finding is typically observed in patients with left bundle branch block?
Widened QRS complex with a slurred S wave in leads I, V5, and V6
Prolonged PR interval
ST-segment elevation in leads II, III, and aVF
ST-segment depression in leads V1-V4