#1
Which of the following is a common symptom of a heart attack?
Shortness of breath
ExplanationShortness of breath is a common symptom due to reduced oxygen supply.
#2
What does ECG stand for?
Electrocardiogram
ExplanationECG stands for Electrocardiogram, a test measuring heart's electrical activity.
#3
What is the normal range for heart rate in adults at rest?
60-80 beats per minute
ExplanationNormal heart rate in adults at rest ranges from 60 to 80 beats per minute.
#4
Which of the following is not a major risk factor for coronary artery disease?
Atrial fibrillation
ExplanationAtrial fibrillation is not a major risk factor for coronary artery disease.
#5
In a normal ECG, what does the P wave represent?
Atrial depolarization
ExplanationThe P wave represents atrial depolarization or contraction.
#6
Which of the following conditions is characterized by an irregular heart rhythm?
Atrial fibrillation
ExplanationAtrial fibrillation is characterized by irregular heart rhythm.
#7
Which ECG lead placement is commonly used to detect myocardial infarction?
Lead V1
ExplanationLead V1 is commonly used to detect myocardial infarction.
#8
Which electrolyte imbalance can cause characteristic changes in the ECG, such as prolonged QT interval?
Hyperkalemia
ExplanationHyperkalemia can cause prolonged QT interval and other ECG changes.
#9
What does the T wave represent in an ECG?
Ventricular repolarization
ExplanationThe T wave represents ventricular repolarization.
#10
Which ECG lead placement is commonly used to monitor for changes indicative of inferior myocardial infarction?
Lead III
ExplanationLead III is commonly used to monitor for changes indicating inferior myocardial infarction.
#11
What is the term for the measurement of electrical activity in the heart over time?
Electrocardiography
ExplanationElectrocardiography is the measurement of heart's electrical activity.
#12
Which part of the heart's conduction system is responsible for delaying impulse transmission, allowing atrial contraction before ventricular contraction?
AV node
ExplanationThe AV node delays impulse transmission allowing sequential contraction of atria and ventricles.
#13
Which of the following factors can influence the interpretation of an ECG?
All of the above
ExplanationAll of the above factors can influence ECG interpretation.
#14
Which of the following is a potential cause of left bundle branch block (LBBB) on an ECG?
All of the above
ExplanationAll of the listed factors can cause left bundle branch block (LBBB) on an ECG.
#15
Which of the following is a potential cause of right bundle branch block (RBBB) on an ECG?
All of the above
ExplanationAll of the listed factors can cause right bundle branch block (RBBB) on an ECG.