Fundamentals · chapter 19 · Oxygenation and Perfusion
Factors Affecting Cardiopulmonary Function
The 14 things this section of the textbook says that you are most likely to be asked about — quoted word for word, not retold. Then 6 practice questions with the reasoning.
Key points
Nonmodifiable and modifiable risks
Nonmodifiable risk factors for impaired cardiopulmonary function include advancing age, genetics, race, family history, and health status. Modifiable risk factors include physical inactivity, smoking, diet, and obesity.
Age-related baroreceptor changes
In the blood vessels, baroreceptors can become less sensitive with aging, causing dizziness or orthostatic hypotension.
Aging lung mechanics
Aging lungs lose elastic recoil, causing small airway collapse and decreased alveolar surface area, decreasing lung compliance.
Genetic aortic aneurysm risk
However, Marfan syndrome also frequently impacts blood vessels, including the aorta. The risk of aortic aneurysm and possible dissection is a major concern with this genetic diagnosis (Musunuru et al., 2020).
Cystic fibrosis secretions
CF causes mucus to become thick and sticky, with respiratory secretions among those affected; this can cause airway limitations and difficulty breathing.
Metabolic syndrome cardiac risk
The metabolic syndrome is an example of a cluster of diseases (including hypertension, high blood sugar levels, a large waistline or apple shape, high triglycerides, and low HDL cholesterol) that occur together, increasing the likelihood of developing heart disease.
Key cardiopulmonary comorbidities
The four cardiopulmonary diagnoses isolated in this research were HF, peripheral arterial disease (PAD), coronary heart disease (CHD), and stroke. DM, COPD, and low vision were identified as the comorbidities with the most statistically significant impact on the development of the disorders.
Medication adverse effects
Drugs have desired effects and side effects. Sometimes, side effects are negative or even dangerous, referred to as adverse effects.
Smoking respiratory infection risk
Smoking causes a disruption of the mucociliary elevator in the lungs, which can lead to increased colonization of bacteria in the lower respiratory tract and frequent infections.
Sodium and fluid retention
Sodium retention is associated with water retention, so elevated plasma sodium tends to cause hypervolemia and hypertension.
Potassium and dysrhythmias
Potassium can cause devastating problems if it is not kept in range: if elevated or decreased, minor symptoms may be apparent, or ultimately dysrhythmias are possible, and may be deadly.
Recommended aerobic activity
At least 150 minutes of moderate aerobic exercise activity weekly is recommended by the AHA (2023) to maintain and possibly improve health status and avoid complications.
Environmental stressor susceptibility
Examples of environmental stressors include air pollution, noise and light pollution, wildfires, and climate change (Münzel et al., 2021). The cardiovascular and pulmonary systems are both susceptible to these environmental influences.
Purpose of cultures
Cultures are obtained to identify whether an infection of some sort is present by growing particular microbes in the laboratory.
Terms to know
- Homeostasis
- Homeostasis is a delicate balance, and minute changes can lead to slight or major changes physiologically.
- comorbidities
- Conversely, someone whose baseline is poor health, as reflected by multiple comorbidities (multiple medical diagnoses), is at a disadvantage as far as withstanding the challenging event.
- metabolic syndrome
- The metabolic syndrome is an example of a cluster of diseases (including hypertension, high blood sugar levels, a large waistline or apple shape, high triglycerides, and low HDL cholesterol) that occur together, increasing the likelihood of developing heart disease.
- adverse effects
- Sometimes, side effects are negative or even dangerous, referred to as adverse effects.
- Cultures
- Cultures are obtained to identify whether an infection of some sort is present by growing particular microbes in the laboratory.
- mycobacterium
- Other microbes may also be cultured, including mycobacterium (the specific type of bacteria that causes tuberculosis), viruses, and fungi.
Practice questions
Stuck on select-all-that-apply? How to take them one option at a time.
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Every question here, with the answer
An older adult reports dizziness when getting out of bed in the morning. Which age-related cardiovascular change should the nurse consider as a likely contributor?
- The aorta becomes more elastic, lowering blood pressure.
- Capillary walls become thinner, speeding gas and nutrient exchange.
- Baroreceptors can become less sensitive with aging.
- Red blood cells are produced at a faster rate with aging.
Answer: Baroreceptors can become less sensitive with aging.
The section states that aging can make baroreceptors less sensitive, which can cause dizziness or orthostatic hypotension. The other options contradict the section: red blood cells are produced more slowly, capillary walls may thicken, and the aorta can thicken and stiffen, increasing BP.
A nurse is reviewing a patient’s cardiopulmonary risk profile and suspects metabolic syndrome. Which findings are part of the cluster described in the section? Select all that apply.
- A large waistline or apple shape
- Hypertension
- High HDL cholesterol
- High blood sugar levels
- High triglycerides
Answer: A large waistline or apple shape, Hypertension, High blood sugar levels, High triglycerides
The section identifies hypertension, high blood sugar levels, a large waistline or apple shape, high triglycerides, and low HDL cholesterol as the cluster of metabolic syndrome. High HDL cholesterol is not listed; the concern is low HDL cholesterol.
A 15-year-old who has been vaping says, “I suppose you’re going to lecture me,” after several visits for a “cold” that does not improve. Which nursing response best reflects the communication approach in the section?
- “You need to stop vaping immediately because your parents are right to be upset.”
- “What seems like a cold may be your lungs trying to recover after each time you vape; we can help you cut down and stop when you are ready.”
- “There is nothing to discuss until you decide to quit completely.”
- “If your friends do not have symptoms, vaping is probably not related to your problem.”
Answer: “What seems like a cold may be your lungs trying to recover after each time you vape; we can help you cut down and stop when you are ready.”
The patient conversation models avoiding a lecture, explaining the relationship between vaping and persistent symptoms, and offering help to cut down and stop. The other responses are judgmental, dismiss the patient’s symptoms, or close off follow-up support.
The nurse is reviewing medications discussed in the section as having potential cardiopulmonary effects. Which concerns should the nurse include in monitoring or teaching? Select all that apply.
- Cyclophosphamide has the potential to cause pulmonary fibrosis and cardiotoxicity.
- Amiodarone has a risk for cardiac rhythm changes.
- Amiodarone may affect the pulmonary system, including pulmonary fibrosis and acute respiratory distress syndrome.
- Most antidysrhythmic drugs may cause other dysrhythmias.
- Daunorubicin can be used without considering past total dose because its effect is not cumulative.
Answer: Cyclophosphamide has the potential to cause pulmonary fibrosis and cardiotoxicity., Amiodarone has a risk for cardiac rhythm changes., Amiodarone may affect the pulmonary system, including pulmonary fibrosis and acute respiratory distress syndrome., Most antidysrhythmic drugs may cause other dysrhythmias.
The section states that many antidysrhythmics may cause dysrhythmias, and specifically notes cardiac rhythm and pulmonary risks with amiodarone. It also identifies pulmonary fibrosis and cardiotoxicity as possible effects of cyclophosphamide; daunorubicin is described as having a cumulative effect with dosing, so past total dose matters.
A sedentary adult asks what activity goal is recommended to help maintain or improve cardiopulmonary health. Which teaching should the nurse provide?
- Aim for at least 150 minutes of moderate aerobic exercise activity weekly and try to make exercise habitual.
- Physical activity affects weight but has no effect on circulation, blood pressure, lipids, or atherosclerotic plaque.
- Exercise is useful only after cardiopulmonary symptoms have already developed.
- Avoid aerobic exercise and focus only on rest to prevent cardiopulmonary strain.
Answer: Aim for at least 150 minutes of moderate aerobic exercise activity weekly and try to make exercise habitual.
The section identifies at least 150 minutes of moderate aerobic exercise weekly as the AHA recommendation and emphasizes making exercise habitual. The other options conflict with the section’s focus on proactive prevention and the benefits of activity for circulation, BP, lipids, and atherosclerotic plaque formation.
A community health nurse is teaching city residents about environmental stressors that can negatively affect cardiopulmonary health. Which examples should the nurse include? Select all that apply.
- Wildfires
- Noise and light pollution
- Climate change
- Air pollution
- High HDL cholesterol
Answer: Wildfires, Noise and light pollution, Climate change, Air pollution
The section lists air pollution, noise and light pollution, wildfires, and climate change as environmental stressors that can negatively affect cardiopulmonary health. High HDL cholesterol is not identified as an environmental stressor in the section.
Where every quote comes from
Section 19.3 Factors Affecting Cardiopulmonary Function of Fundamentals of Nursing by Christy Bowen, Lindsay Draper, Heather Moore, OpenStax, 2024. Read the whole section free at openstax.org.
The textbook is licensed under CC BY-NC-SA 4.0. This page quotes it word for word and adds the headings, the order and the practice questions; references to the book's figures and stray spaces left by its formatting are removed. The page is shared under the same licence. Nothing here is sold.