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Difficulty: MediumAnxiety, OCD, and Trauma-Related Disorders

A 25-year-old primigravida at 14 weeks gestation is evaluated in the emergency department for sudden-onset palpitations, chest tightness, trembling, and a feeling of impending doom that awoke her from sleep. The episode peaked within 10 minutes and has now resolved. She has had three similar unexpected episodes over the past month. She now refuses to leave her house unless accompanied by her husband, fearing she will have an attack in public. Medical history is notable for a hospitalization at age 19 for a manic episode with psychotic features; she had been stable on lithium but discontinued it 6 months prior to conception.

Her temperature is 37.0°C (98.6°F), blood pressure is 112/70 mm Hg, pulse is 92/min, and respirations are 18/min. Pulse oximetry is 99% on room air. She mentions a chronic, mild sensation of breathlessness over the last few weeks. Physical examination is unremarkable.

Laboratory results:
- TSH: 0.2 μ\mu IU/mL (normal: 0.4-4.0 μ\mu IU/mL)
- Free T 4_4: 1.3 ng/dL (normal: 0.8-1.8 ng/dL)

Arterial blood gas analysis on room air:
- pH: 7.45
- PaCO 2_2: 30 mm Hg
- PaO 2_2: 102 mm Hg

The patient's husband is distressed by her avoidance behaviors and demands she be given an intravenous sedative immediately. However, the patient explicitly declines any pharmacotherapy due to fear of teratogenicity. Which of the following is the most appropriate next step in management?

  1. Initiate cognitive-behavioral therapyAnswer
  2. B
    Initiate citalopram therapy
  3. C
    Administer involuntary intravenous lorazepam
  4. D
    Initiate methimazole therapy
  5. E
    Order computed tomography pulmonary angiography

Answer

The most appropriate next step in management is to initiate cognitive-behavioral therapy.
Initiating cognitive-behavioral therapy is the most appropriate next step. The patient's clinical presentation of recurrent, unexpected episodes of intense fear accompanied by physical symptoms and subsequent avoidance behavior confirms a diagnosis of panic disorder with agoraphobia. Because she has a history of bipolar I disorder (which precludes standard SSRI monotherapy) and explicitly refuses pharmacotherapy due to her pregnancy, cognitive-behavioral therapy is the safest and most effective first-line, evidence-based intervention.

Step-by-Step Solution

1
Diagnose the patient's primary psychiatric condition based on the clinical presentation.
The patient has recurrent, unexpected episodes of intense fear with physical symptoms and subsequent avoidance behavior, confirming a diagnosis of Panic Disorder with Agoraphobia.
Accurate diagnosis is required before selecting a treatment modality.
2
Evaluate the patient's comorbidities and their impact on standard treatment options.
The patient has a history of Bipolar I Disorder. This contraindicates the use of SSRI or SNRI monotherapy, which are standard pharmacological treatments for panic disorder, due to the high risk of precipitating a manic switch.
Pharmacological interventions must be safe given the patient's full psychiatric history.
3
Assess the objective laboratory and physiological data to rule out medical mimics.
The mild dyspnea, isolated slightly low TSH, and compensated respiratory alkalosis are all normal physiologic changes of pregnancy. No urgent medical intervention is required for these findings.
It is crucial to differentiate between pathological states (e.g., hyperthyroidism, pulmonary embolism) and normal pregnancy physiology to avoid unnecessary interventions.
4
Incorporate the patient's preferences and ethical principles into the management plan.
The patient is competent and explicitly refuses pharmacotherapy. Her autonomy must be respected, pointing clearly to an evidence-based non-pharmacological treatment.
Patient autonomy allows competent patients to refuse any treatment, guiding the provider toward the best acceptable alternative.

Key Concept

Cognitive-behavioral therapy is the safest and most appropriate first-line treatment for panic disorder in a pregnant patient who has a history of bipolar disorder and who refuses pharmacotherapy.
Estimated Time:1m 30s
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Topics

Anxiety, OCD, and Trauma-Related Disorders

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