What component of the conduction system is referred to as the pacemaker of the heart?

Atrioventricular (AV) node

Bundle branches

Bundle of His

Sinoatrial (SA) node

Answer and Explanation

The Correct Answer is D

A.   Atrioventricular (AV) node: The AV node conducts electrical signals from the atria to the ventricles, but it is not the pacemaker of the heart.
B.   Bundle branches: The bundle branches transmit the electrical impulses to the ventricles but are not the primary pacemaker.
C.   Bundle of His: The Bundle of His conducts electrical signals from the AV node to the bundle branches and ventricles but does not act as the pacemaker.
D.   Sinoatrial (SA) node: The SA node, located in the right atrium, is the primary pacemaker of the heart, initiating electrical impulses that regulate heart rhythm.

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Correct Answer is A

Explanation

A. Smoking, hypertension, obesity, diabetes, and high cholesterol: These are all well-established major risk factors for heart disease and should be included in the patient's history.
B. Personality type, high cholesterol, diabetes, and smoking: While personality type may contribute to stress, the other factors listed are more directly linked to heart disease.
C. Alcohol consumption, obesity, diabetes, stress, and high cholesterol: Alcohol consumption may be a risk factor, but smoking and hypertension are more significant.
D. Family history, hypertension, stress, and age: While family history, age, and hypertension are important, this option misses key factors like obesity, smoking, and diabetes.

A. Asthma exacerbation B. Pulmonary embolism C. Pneumothorax D. Pulmonary edema

Correct Answer is C

Explanation

A. Asthma exacerbation typically causes wheezing or bronchospasm and would not usually cause decreased breath sounds in one lung.
B. Pulmonary embolism may cause breathlessness or decreased oxygen levels, but it wouldn't typically cause unilateral decreased breath sounds.
C. Pneumothorax is the most likely cause, as air in the pleural space can collapse the lung, leading to decreased or absent breath sounds on the affected side.
D. Pulmonary edema typically causes bilateral crackles and would not cause unilateral decreased breath sounds.

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What component of the conduction system is referred to as the pacemaker of the heart?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

In assessing a patient's major risk factors for heart disease, which would the nurse want to include when taking a history?

Correct Answer is A

Explanation

A client is brought to the emergency department by ambulance after being involved in a motor vehicle accident. The nurse finds that he has decreased breath sounds over the left lung fields. What might the nurse suspect is the cause?

Correct Answer is C

Explanation

A nurse in an emergency department (ED) is admitting a client. Exhibits Select 4 findings in the client's medical record that place them at risk for pneumonia.

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