#1
Which of the following is a common cause of motion artifact in an ECG?
Electrode detachment
Electrical interference
Patient movement
Loose electrode gel
#2
What is the typical duration of a normal P wave in an ECG?
Less than 0.04 seconds
0.06 to 0.12 seconds
0.20 to 0.30 seconds
0.40 to 0.50 seconds
#3
Which ECG waveform represents ventricular depolarization?
P wave
QRS complex
T wave
U wave
#4
What does 'ST segment elevation' typically indicate on an ECG?
Myocardial infarction
Hypokalemia
Pulmonary embolism
Atrial fibrillation
#5
Which of the following artifacts is commonly caused by electrode poor contact or muscle contraction?
Baseline wander
60 Hz interference
Somatic tremor
Electrode reversal
#6
What is a common characteristic of the QRS complex in a normal ECG?
It represents ventricular repolarization
It typically has a duration of less than 0.12 seconds
It indicates atrial contraction
It is followed by the T wave
#7
Which of the following is a typical characteristic of an artifact known as 'AC interference'?
Regular pattern with a frequency of 60 Hz
Irregular pattern with varying frequencies
High-frequency oscillations
Low-frequency oscillations
#8
What does 'QT prolongation' suggest when observed on an ECG?
Hypercalcemia
Myocardial infarction
Risk of torsades de pointes
Ventricular hypertrophy
#9
Which artifact is caused by loose electrode connections or poor skin preparation?
Electrical interference
Baseline wander
Muscle tremor
Electrode artifact
#10
What does the 'J point' represent on an ECG tracing?
Beginning of the QRS complex
End of the P wave
End of the ST segment
Beginning of the T wave
#11
What does the term 'atrial escape rhythm' refer to on an ECG?
Rhythm originating from the atria during bradycardia
Rhythm originating from the ventricles during bradycardia
Rhythm originating from the atria during tachycardia
Rhythm originating from the ventricles during tachycardia
#12
What is 'Torsades de pointes' as observed on an ECG?
Atrial flutter
Ventricular tachycardia
Sinus bradycardia
First-degree heart block
#13
Which of the following conditions is commonly associated with 'Osborn waves' on an ECG?
Hypothermia
Hyperkalemia
Hypokalemia
Hypercalcemia
#14
What is a potential cause of 'sawtooth pattern' on an ECG?
Ventricular fibrillation
Atrial flutter
Sinus rhythm
Second-degree heart block
#15
What is a common finding in 'Wolff-Parkinson-White syndrome' on an ECG?
Absence of P waves
Short PR interval
Wide QRS complex
Presence of U waves
#16
Which of the following represents an abnormal finding in the T wave morphology of an ECG?
Biphasic T wave
Inverted T wave in leads V1-V3
Presence of U waves
Flat T wave
#17
What is a common cause of 'P pulmonale' on an ECG?
Right ventricular hypertrophy
Left ventricular hypertrophy
Left atrial enlargement
Right atrial enlargement
#18
Which of the following ECG abnormalities is commonly associated with hyperkalemia?
Peaked T waves
Sine wave appearance
Prominent U waves
Prolonged PR interval
#19
Which electrolyte abnormality is often associated with 'Osborn waves'?
Hyperkalemia
Hypokalemia
Hypercalcemia
Hypomagnesemia
#20
What does 'P mitrale' suggest when observed on an ECG?
Right atrial enlargement
Left ventricular hypertrophy
Left atrial enlargement
Right ventricular hypertrophy
#21
Which ECG finding is typically seen in patients with pericarditis?
ST segment elevation in all leads
ST segment depression in all leads
Presence of Osborn waves
Prolonged QT interval
#22
Which of the following conditions is associated with 'delta waves' on an ECG?
Wolff-Parkinson-White syndrome
Atrial fibrillation
Ventricular fibrillation
Sinus rhythm
#23
What is 'Junctional escape rhythm' as seen on an ECG?
Rhythm originating from the atria during tachycardia
Rhythm originating from the ventricles during bradycardia
Rhythm originating from the atrioventricular node during bradycardia
Rhythm originating from the sinoatrial node during bradycardia
#24
Which of the following represents a common cause of 'QT interval prolongation'?
Hypercalcemia
Hypocalcemia
Hyperkalemia
Hypokalemia
#25
What does 'R on T phenomenon' suggest on an ECG?
Risk of ventricular fibrillation
Normal sinus rhythm
Presence of delta waves
Atrial flutter