A nurse is assessing a pregnant client at 28 weeks gestation with a history of mitral valve stenosis. Which assessment finding would be the most concerning and require immediate intervention?
The nurse is monitoring a pregnant client with known cardiac disease for signs of cardiac decompensation during the second trimester.
1Dyspnea at rest with orthopnea (indicating cardiac decompensation)✓ 정답
2Mild ankle edema at the end of the day (common in pregnancy)
3Heart rate of 90 beats per minute (within normal range for pregnancy)
4Weight gain of 2 pounds in one week (expected in second trimester)
해설
Dyspnea at rest with orthopnea indicates cardiac decompensation requiring immediate intervention in mitral stenosis. Other findings (mild edema, HR 90, weight gain) are normal in pregnancy.
Core Nursing ExplanationKey Concept Analysis: This question integrates the pathophysiology of Mitral valve stenosis with the physiological changes of pregnancy to test your ability to identify a sign of cardiac decompensation. In mitral stenosis, the narrowed valve obstructs blood flow from the left atrium to the left ventricle. This leads to increased left atrial pressure, pulmonary venous congestion, and ultimately, pulmonary edema. Pregnancy dramatically increases blood volume and cardiac output, placing a significant strain on a heart with a fixed obstruction like mitral stenosis. This combination makes the client highly susceptible to heart failure.
Answer Rationale: Key Point!Dyspnea at rest with orthopnea is a classic sign of left-sided heart failure and pulmonary congestion. In the context of a pregnant client with a known cardiac lesion, this is not a normal pregnancy symptom but a red flag for cardiac decompensation. It requires immediate intervention to prevent progression to severe pulmonary edema and hypoxemia, which endanger both the mother and fetus.
Distractor Analysis:
• Watch out for confusion!Mild ankle edema at the end of the day (Option 2) is a common finding in pregnancy due to increased venous pressure and hormonal changes. It becomes concerning only if it is sudden, severe, generalized, or accompanied by hypertension and proteinuria (signs of preeclampsia).
• Heart rate of 90 beats per minute (Option 3) is within the expected range for pregnancy. Resting heart rate typically increases by 10-15 bpm during pregnancy. A rate of 90 bpm alone is not indicative of decompensation.
• Weight gain of 2 pounds in one week (Option 4) can be a normal pattern of weight gain in the second trimester. Sudden, excessive weight gain (e.g., more than 3-4 lbs in a week) could signal fluid retention and be concerning, but 2 lbs is generally within acceptable limits and not the most concerning finding here.
Related Concepts: The nurse must differentiate between normal physiological adaptations of pregnancy and pathological signs of cardiac failure. Other signs of cardiac decompensation in pregnancy include worsening or new-onset dyspnea on exertion, paroxysmal nocturnal dyspnea (PND), chest pain, hemoptysis (in severe mitral stenosis), tachycardia >110-120 bpm, a new systolic murmur, or signs of right-sided failure like jugular venous distension (JVD).
Concept Summary
• Mitral Stenosis Patho: Valve narrowing → Left atrial pressure ↑ → Pulmonary venous congestion → Pulmonary edema risk.
• Pregnancy + Cardiac Disease: Increased blood volume (by ~50%) and cardiac output place extreme stress on a compromised heart, highest risk during 28-32 weeks gestation and postpartum.
• Signs of Decompensation: Dyspnea at rest, orthopnea, PND, tachycardia, crackles (rales) on lung auscultation.
• Normal Pregnancy Findings: Mild dependent edema, increased HR (10-15 bpm), steady weight gain.
Side-by-Side Comparison!
Finding
Normal in Pregnancy
Concerning for Cardiac Decompensation
Dyspnea
Mild, with exertion (especially in 3rd trimester due to diaphragm pressure)
At rest, worsening, or accompanied by orthopnea/PND
Edema
Mild, dependent (ankles/feet), late in the day
Sudden, generalized (face/hands), or pitting edema
Heart Rate
Increase of 10-15 bpm from baseline (e.g., 70→85 bpm)
Sustained >110-120 bpm, especially at rest
Weight Gain
Steady: ~1 lb/week in 2nd/3rd trimester
Rapid: >3-4 lbs in one week (suggests fluid retention)
Anatomy, Physiology & Pharmacology Points
• Anatomy/Physiology: The mitral valve (bicuspid valve) lies between the left atrium and left ventricle. Stenosis prevents adequate ventricular filling during diastole, causing a backup into the pulmonary circulation.
• Pregnancy Physiology: Blood volume peaks at 28-32 weeks (increased by 40-50%). Cardiac output increases by 30-50%. This is the period of highest risk for cardiac decompensation.
• Pharmacology: Diuretics like furosemide may be used cautiously for pulmonary edema, but over-diuresis can reduce placental perfusion. Beta-blockers (e.g., metoprolol) may be used to control heart rate and improve diastolic filling time in mitral stenosis.
Memory Tips
• Mnemonic for Cardiac Decompensation in Pregnancy: Decompensation Occurs With New Symptoms (DOWNS): Dyspnea at rest, Orthopnea, Wheezing/crackles, Nocturnal symptoms (PND), Syncope/chest pain.
• Think: "Dyspnea at rest is never a guest" in normal pregnancy. Its presence with a cardiac history is a critical distress signal.
High-Frequency NCLEX Topics
This integrates two high-yield areas: Maternal-Newborn Nursing (normal vs. abnormal pregnancy findings) and Medical-Surgical Nursing (cardiac assessment, heart failure). The NCLEX loves questions that force you to prioritize and differentiate normal physiology from pathology in a vulnerable population.
Watch Out for Question Variations!
• Instead of asking for the "most concerning finding," the question could ask: "The nurse should report which finding to the provider immediately?" (Same answer).
• It could shift to interventions: "Which action should the nurse take first for a pregnant client with mitral stenosis reporting dyspnea at rest?" (Answer: Position in High-Fowler's, administer O2, notify provider).
• It could test knowledge of the highest risk period: "During which trimester is a client with mitral stenosis at greatest risk for cardiac decompensation?" (Answer: Late second to early third trimester, 28-32 weeks).
Nursing Clinical Practice GuideClinical Scenario: You are the nurse on the antepartum unit. Ms. Lopez, 28 weeks pregnant with a history of rheumatic heart disease and mitral stenosis, calls you to her room. She states, "I can't catch my breath, even just sitting here watching TV. Last night, I had to pile up three pillows to sleep."
Nursing Intervention Strategy:
1Immediate Assessment (ABCs)• Airway & Breathing: Assess respiratory rate, effort, O2 saturation. Auscultate lung bases for crackles (rales). Position in High-Fowler's to decrease venous return and improve lung expansion.
• Circulation: Check apical heart rate and rhythm (listen for murmur), blood pressure, and assess for peripheral edema or JVD.
2Immediate Actions• Apply supplemental oxygen as ordered and monitor saturation.
• Notify the provider and obstetrician immediately—this is a potential obstetric emergency.
• Obtain a stat 12-lead ECG and echocardiogram may be ordered.
• Administer medications as ordered (e.g., diuretics, beta-blockers) with careful monitoring of fetal heart rate (FHR) and maternal blood pressure.
3Ongoing Monitoring & Education• Strict intake and output (I&O), daily weights.
• Educate on signs to report immediately: increased shortness of breath, chest pain, palpitations, or decreased fetal movement.
• Coordinate care with cardiology and maternal-fetal medicine (high-risk OB).
Patient Safety and Precautions:
• Key Point! Avoid supine position (can cause supine hypotensive syndrome and worsen dyspnea). Always position laterally or with head elevated.
• Diuretics must be used judiciously. Over-aggressive diuresis can lead to dehydration, electrolyte imbalance, and reduced uteroplacental blood flow.
• Continuous electronic fetal monitoring (EFM) is often initiated during episodes of maternal decompensation to assess fetal well-being.
Nursing Procedure & Medication FlowWhen Administering Furosemide (Lasix) to a Pregnant Client:
1. Verify order, indication (pulmonary edema), and baseline electrolytes (especially potassium).
2. Administer IV push slowly (over 1-2 minutes) to avoid ototoxicity.
3. Monitor for: Rapid diuresis, hypotension, fetal heart rate decelerations (sign of reduced placental perfusion).
4. Replace potassium as ordered (hypokalemia is a major side effect).
5. Document pre- and post-administration lung sounds, weight, and I&O.
A Word from Your Senior Nurse
"Caring for a pregnant patient with cardiac disease requires you to hold two pictures in your mind at once: the normal, amazing physiology of pregnancy and the abnormal, dangerous pathophysiology of the heart condition. Your most powerful tool is astute assessment. That complaint of 'just needing an extra pillow' is not trivial—it's a critical clue. On the NCLEX and in practice, never dismiss the patient's subjective report, especially when it aligns with a known high-risk condition. You are the early warning system."