The normal pathway of the conduction system is which one of the following?

SA node - AV node - bundle of his - bundle branches - Purkinje fibers.

SA node - bundle of his -AV node - bundle branches - Purkinje fibers.

SA node - AV node - bundle branches - Ventricles - Purkinje fibers.

AV node-SA node - a bundle of his - bundle branches - Purkinje fibers.

Answer and Explanation

The Correct Answer is A

This pathway represents the normal sequence of electrical impulses that coordinate the contraction and relaxation of the heart chambers.
The electrical signal originates from the sinoatrial (SA) node, which is often referred to as the natural pacemaker of the heart. It is located in the right atrium and generates the electrical impulses that initiate each heartbeat. From the SA node, the electrical signal travels to the atrioventricular (AV) node, which is located at the junction between the atria and ventricles.
After passing through the AV node, the electrical impulse travels through the bundle of His (also known as the atrioventricular bundle) and divides into the right and left bundle branches. These branches continue the conduction pathway and deliver the electrical signal to the Purkinje fibers.
The Purkinje fibers spread the electrical impulse rapidly throughout the ventricles, stimulating the contraction of the ventricular muscle and allowing for efficient pumping of blood out of the heart.
Therefore, the correct sequence of the normal conduction pathway in the heart is:
A. SA node - AV node - bundle of His - bundle branches - Purkinje fibers.

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Correct Answer is C

Explanation

In septic shock, one of the key goals of management is to restore and maintain adequate intravascular volume. However, in this case, the patient's urine output is low (30 mL/hr for the past 3 hours), suggesting inadequate renal perfusion and potential fluid overload.
Administering additional normal saline at an increased rate (250 mL/hr) without addressing the low urine output could potentially exacerbate fluid overload and further compromise the patient's condition.
A. Administer hydrocortisone (Solu-Cortef) 100 mg IV in (option A) is incorrect because: Hydrocortisone is commonly used in septic shock to help stabilize blood pressure and modulate the inflammatory response.
B. Giving PRN furosemide (Lasix) 40 mg IV in (option B) is incorrect because Furosemide, a loop diuretic, can be administered as needed to address fluid overload or to increase urine output if there is evidence of volume overload.
D. Titrate norepinephrine (Levophed) to keep systolic BP >90 mm Hg in (option D) is incorrect because: Norepinephrine is a vasopressor commonly used in septic shock to increase systemic vascular resistance and maintain adequate blood pressure.

A. Assess the patient's tissue perfusion further. B. Ask if the patient needs pain medication. C. Document the findings in the patient's chart. D. Increase the rate of the patient's IV infusion.

Correct Answer is A

Explanation

The increased respiratory rate and pulse rate can be indicators of physiological changes or potential complications in the patient's condition. These changes may suggest alterations in tissue perfusion or other underlying issues that require further assessment.
Assessing the patient's tissue perfusion includes evaluating additional vital signs, such as blood pressure, oxygen saturation, and capillary refill time. Assessing skin color, temperature, and moisture, as well as peripheral pulses, can also provide important information regarding tissue perfusion.
B. Pain medication (option B) is incorrect because the increased respiratory and pulse rates could also indicate other factors that require assessment before administering pain medication.
C. Documenting the findings in the patient's chart (option C) is incorrect because it should not be the primary action at this point. Assessing the patient's condition and determining appropriate interventions take priority.
D. Increasing the rate of the patient's IV infusion (option D) is incorrect because may not be the most appropriate action without further assessment. The patient's increased respiratory and pulse rates may not necessarily be related to hydration status, and it is important to assess the patient comprehensively before making changes to the IV infusion rate.
Therefore, the best action by the nurse in this situation is to further assess the patient's tissue perfusion to gather more information and determine the appropriate course of action.

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The normal pathway of the conduction system is which one of the following?

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Naxlex Comprehensive Predictor Exams

A 78-kg patient with septic shock has a urine output of 30 mL/hr for the past 3 hours. The pulse rate is 120/minute and the central venous pressure and pulmonary artery wed pressure are low. Which order by the health care provider will the nurse question?

Correct Answer is C

Explanation

The medical-surgical nurse is caring for a 55-year-old female patient after surgery. The patient's respiratory rate has increased from 12 to 22 breaths/min, and the pulse rate has increased from 86 to 110 beats/min since the patient was last assessed 4 hours ago. What action by the nurse is best?

Correct Answer is A

Explanation

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