#1
What does an electrocardiograph measure?
Heart rate
ExplanationElectrocardiograph measures heart rate by detecting electrical activity.
#2
Which component of an electrocardiograph detects and records the electrical activity of the heart?
Electrodes
ExplanationElectrodes detect and record the electrical activity of the heart.
#3
What is the medical term for an abnormally slow heart rate?
Bradycardia
ExplanationBradycardia refers to an abnormally slow heart rate.
#4
What does the P wave represent in an electrocardiogram (ECG)?
Atrial depolarization
ExplanationThe P wave represents the depolarization of the atria.
#5
Which lead configuration is commonly used to monitor the heart's electrical activity during a standard ECG?
All of the above
ExplanationAll lead configurations are commonly used in a standard ECG.
#6
What is the standard paper speed used in most electrocardiographs?
100 mm/s
ExplanationStandard paper speed for most electrocardiographs is 100 mm/s.
#7
Which part of the electrocardiogram represents ventricular repolarization?
T wave
ExplanationThe T wave represents ventricular repolarization.
#8
What is the primary purpose of using gel or paste with ECG electrodes?
To improve electrode conductivity
ExplanationGel or paste improves electrode conductivity for better readings.
#9
What does the ST segment represent in an electrocardiogram?
Ventricular repolarization
ExplanationST segment represents ventricular repolarization.
#10
Which lead placement is commonly used to monitor the electrical activity of the inferior region of the heart?
Lead II
ExplanationLead II is commonly used for monitoring the inferior region.
#11
What does the QT interval represent in an electrocardiogram?
Ventricular depolarization to ventricular repolarization
ExplanationThe QT interval represents the electrical activity of the ventricles.
#12
What is the normal duration of the PR interval in an ECG?
0.06 - 0.10 seconds
ExplanationNormal PR interval duration ranges from 0.06 to 0.10 seconds.
#13
Which electrolyte imbalance can cause a prolonged QT interval on an ECG?
Hypokalemia
ExplanationHypokalemia can cause a prolonged QT interval.
#14
Which of the following conditions is commonly associated with a widened QRS complex on an ECG?
Ventricular tachycardia
ExplanationWidened QRS complex is commonly associated with ventricular tachycardia.
#15
What is the term for the phenomenon where a premature atrial contraction is immediately followed by a non-conducted P wave?
Atrial bigeminy
ExplanationAtrial bigeminy describes the phenomenon.
#16
Which of the following statements about lead aVR in a standard 12-lead ECG is true?
It is an augmented limb lead with a negative electrode on the right arm.
ExplanationLead aVR has a negative electrode on the right arm.
#17
What is the characteristic appearance of a U wave on an ECG?
A small positive deflection following the T wave
ExplanationU wave is a small positive deflection following the T wave.