Which of the following factors directly affects stroke volume?

Blood pressure

Preload

Afterload

Heart rate

Answer and Explanation

The Correct Answer is B

Choice A Reason:
Blood pressure itself does not directly affect stroke volume. However, it can influence afterload, which in turn affects stroke volume. Blood pressure is the force exerted by circulating blood on the walls of blood vessels, and while it is related to cardiac function, it is not a direct determinant of stroke volume.

Choice B Reason:
Preload directly affects stroke volume. Preload refers to the degree of stretch of the cardiac muscle fibers at the end of diastole, just before contraction. It is influenced by the volume of blood returning to the heart (venous return). According to the Frank-Starling law, an increase in preload leads to an increase in stroke volume due to the enhanced force of contraction.

Choice C Reason:
Afterload also directly affects stroke volume. Afterload is the resistance the ventricles must overcome to eject blood during systole. It is influenced by factors such as arterial blood pressure and vascular resistance. An increase in afterload can decrease stroke volume because the heart has to work harder to pump blood against the higher resistance.

Choice D Reason:
Heart rate does not directly affect stroke volume. Instead, heart rate and stroke volume together determine cardiac output (CO = HR × SV). While heart rate can influence the overall amount of blood pumped by the heart per minute, it does not directly change the volume of blood ejected with each beat.

Nursing Test Bank

Test Bank #1: RN Pharmacology Exams Test Bank #2: RN Medical-Surgical Exams Test Bank #3: RN Fundamentals Exams Test Bank #4: RN Maternal-Newborn Exams Test Bank #5: RN Anatomy and Physiology Exams Test Bank #6: RN Obstetrics and Pediatrics Exams Test Bank #7: RN Fluid and Electrolytes Exams Test Bank #9: RN Adult Health Test Bank #10: RN Dosage Calculation Test Bank #11: RN Community Health Exams Test Bank #12: RN Psychology Exams Test Bank #13: RN Nursing Care Of Children Test Bank #14: RN Foundations of Nursing Exams

Get 100+ Naxlex Exit Exams for $79 Try Naxlex NCLEX-RN (14 Day Free-Trial)

Naxlex Comprehensive Predictor Exams

Exam #1: RN Comprehensive predictor 2023 proctored exam Exam #2: Ati rn vati comprehensive predictor proctored exam Exam #3: Ati Rn Comprehensive Predictor Proctored Exam 2023 Exam #4: Rn Comprehensive Predictor 2023 Proctored Exam - St. Joseph Exam #5: RN Comprehensive Predictor Proctored Exam (National U CA San Diego) Exam #6: Ati rn comprehensive predictor 2023 retake proctored exam Exam #7: RN Hesi Exit Proctored Exam Exam #8: Hesi RN Exit proctored exam Exam #9: Hesi rn exit proctored exam Exam #10: Hesi Rn compass exit B proctored exam

Free Nursing Study Resources

Correct Answer is C

Explanation

Choice A Reason:
Elevating the client's head on two pillows can help reduce ICP by promoting venous drainage from the brain. However, it is important to ensure that the head is not elevated too high, as this can impede venous return and potentially increase ICP. The recommended elevation is typically 30 degrees. While this intervention is beneficial, it is not the most critical action compared to reducing environmental stimuli.

Choice B Reason:
Keeping the client well hydrated is essential for overall health, but excessive hydration can increase ICP by increasing the volume of cerebrospinal fluid and blood within the cranial vault. Fluid management must be carefully monitored to avoid exacerbating ICP. Therefore, while hydration is important, it must be balanced and not excessive.

Choice C Reason:
Decreasing the noise level in the client's room is crucial for minimizing external stimuli that can increase ICP. Noise and other environmental stressors can lead to increased agitation and stress, which in turn can elevate ICP. Creating a calm and quiet environment helps in maintaining a stable ICP and is a non-invasive, easily implementable intervention.

Choice D Reason:
Frequent suctioning of the endotracheal tube can cause transient increases in ICP due to the stimulation and potential for coughing. While suctioning is necessary to maintain airway patency, it should be performed judiciously and only when clinically indicated. Over-suctioning can lead to spikes in ICP and should be avoided.

A. 0.5-1 L/min B. 10-12 L/min C. 4-6 L/min D. 15-20 L/min

Correct Answer is C

Explanation

Choice A Reason:
The range of 0.5-1 L/min is significantly lower than the normal cardiac output for adults. Such low values could indicate severe heart failure or other critical conditions where the heart is unable to pump sufficient blood to meet the body's needs.

Choice B Reason:
A cardiac output of 10-12 L/min is higher than the normal range for adults at rest. This level of cardiac output might be seen during intense physical activity or in conditions like hyperthyroidism, where the heart pumps more blood to meet increased metabolic demands.

Choice C Reason:
The normal range for cardiac output in adults is typically between 4-6 L/min. This range represents the volume of blood the heart pumps per minute at rest, ensuring adequate perfusion of tissues and organs. Cardiac output can vary based on factors such as age, body size, and physical activity.

Choice D Reason:
A cardiac output of 15-20 L/min is extremely high and would generally be seen only during extreme physical exertion or in pathological conditions. Such high values are not typical for resting adults and indicate a state of increased cardiac demand.

View Question and Answer

Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.

Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today

Which of the following factors directly affects stroke volume?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is caring for a client who has a closed-head injury with elevated ICP readings ranging from 16 to 22 mm Hg. Which of the following actions should the nurse take to decrease the potential for raising the client's ICP?

Correct Answer is C

Explanation

What measurement is the normal range for cardiac output in adults?

Correct Answer is C

Explanation

A nurse is caring for a client who has had a spinal cord injury that resulted in paraplegia. After a week on the unit, the nurse notes that the client is withdrawn and increasingly resistant to rehabilitative efforts by the staff. Which of the following actions should the nurse take?

Susan, the nurse, is caring for a client who has DIC. Which of the following medications should the nurse anticipate administering?

A nurse in an emergency room is caring for a client who sustained partial-thickness burns to both lower legs, chest, face, and both forearms. Which of the following is the priority action the nurse should take?

Which of the following are types of shock and their respective causes? (Select All that Apply.)

A nurse in the emergency department is caring for a client who has extensive partial and full-thickness burns of the head. When planning the client's care, the nurse should identify which of the following risks as the priority for assessment and intervention:

A nurse is assessing a client who sustained a basal skull fracture and notes a thin stream of clear drainage coming from the client's right nostril. Which of the following actions should the nurse take first?

A nurse is assessing a client who is brought to the emergency room with burn injuries. Which of the following findings should the nurse identify as a deep partial-thickness burn?

Which of the following factors directly affects stroke volume?