Correct Answer: B. Panic disorder
Panic disorder is characterized by recurrent, unexpected panic attacks—discrete episodes of intense fear or discomfort with sudden onset, peaking within 10–20 minutes, and lasting 20–30 minutes. This patient's presentation is textbook: 5–6 episodes over 6 months, each lasting 20–30 minutes, with classic autonomic and cognitive symptoms (palpitations, sweating, breathlessness, chest pain, and catastrophic thinking—"impending doom"). The key discriminator is the episodic, time-limited nature and absence of a specific trigger (unlike phobia, which requires an identifiable feared object/situation). According to DSM-5 and ICD-10 criteria adopted in Indian psychiatric practice, panic disorder requires ≥4 panic attacks within a defined period, followed by persistent worry about future attacks or behavioral change. The patient meets this threshold. Autonomic hyperactivity (sympathetic overdrive) during panic attacks is mediated by amygdala hyperactivity and dysregulation of the locus coeruleus–norepinephrine system. In Indian clinical settings, panic disorder is often misdiagnosed as cardiac disease (leading to unnecessary cardiology workup), but the absence of objective cardiac pathology and the stereotyped, recurrent nature of episodes point to panic disorder. Treatment follows Indian guidelines: SSRIs (sertraline, paroxetine) as first-line pharmacotherapy, combined with cognitive-behavioral therapy (CBT) and breathing exercises.
Why the other options are wrong
A. Phobia — Phobia is characterized by persistent, irrational fear of a specific object or situation (e.g., heights, animals, flying). Anxiety in phobia is triggered and predictable—it occurs only when the person encounters or anticipates the feared stimulus. This patient has spontaneous, unexpected panic attacks without an identifiable trigger, ruling out phobia. Additionally, phobic episodes are typically shorter and less severe than panic attacks. C. Generalized anxiety disorder — GAD presents with persistent, excessive worry lasting ≥6 months across multiple life domains (work, health, finances), accompanied by somatic symptoms (muscle tension, sleep disturbance, irritability). Unlike panic disorder, GAD lacks discrete, time-limited episodes; anxiety is chronic and diffuse. This patient's episodic, 20–30 minute attacks with acute autonomic surge are incompatible with GAD's sustained, low-grade worry profile. GAD does not feature the sudden-onset, catastrophic panic attacks seen here. D. Depression — Depression (major depressive disorder) is characterized by persistent low mood, anhedonia, guilt, and neurovegetative symptoms (sleep, appetite, energy changes) lasting ≥2 weeks. While panic attacks can co-occur with depression, the primary presentation here is recurrent panic attacks, not depressed mood or loss of interest. The acute, episodic nature with autonomic hyperactivity is atypical for primary depression. Panic disorder and depression are distinct diagnoses, though comorbidity is common in Indian psychiatric populations.
High-Yield Facts
- Panic attack duration: 10–30 minutes (peak within 10–20 min); distinguishes from prolonged anxiety states.
- Diagnostic threshold: ≥4 panic attacks in a defined period (DSM-5/ICD-10) to diagnose panic disorder.
- Autonomic signature: Sympathetic overdrive (palpitations, sweating, tremor, breathlessness, chest pain, dizziness) due to locus coeruleus hyperactivity.
- Catastrophic cognition: 'Impending doom,' fear of dying, losing control, or having a heart attack—hallmark of panic, not GAD.
- First-line pharmacotherapy in India: SSRIs (sertraline 50–200 mg/day, paroxetine 20–60 mg/day) + CBT and breathing retraining.
- Common misdiagnosis: Cardiac disease (chest pain + palpitations lead to unnecessary angiography); rule out MI, arrhythmia first.
Mnemonics
PAD (Panic Attack Discriminators) Peak in 10–20 min, Autonomic surge (4+ symptoms), Discrete episodes (not continuous). Use when differentiating panic from GAD (which is continuous) or phobia (which is triggered). SCARED (Panic vs. Phobia) Spontaneous onset (panic) vs. Cued/triggered (phobia), Acute autonomic, Recurrent episodes, Episodic (20–30 min), Drama of impending doom. Panic = spontaneous; phobia = cued.
NBE Trap
NBE often pairs chest pain + palpitations with cardiac disease to lure students into ruling out MI first (correct) but then selecting phobia or GAD if cardiac workup is negative. The trap: recognizing the episodic, time-limited, spontaneous nature as the key discriminator for panic disorder, not just the absence of cardiac pathology.
Clinical Pearl
In Indian emergency departments and primary care, panic disorder is frequently misdiagnosed as acute coronary syndrome or arrhythmia. A key bedside clue: the patient's normal vital signs between episodes and normal ECG/troponin combined with stereotyped recurrence strongly suggest panic disorder. Teaching patients breathing techniques (4-7-8 breathing, box breathing) and reassurance about the benign nature of panic attacks are as important as pharmacotherapy in Indian clinical practice.
_Reference: Kaplan & Sadock's Synopsis of Psychiatry (adapted for Indian curricula); ICD-10 Classification of Mental and Behavioural Disorders; DSM-5 Diagnostic and Statistical Manual of Mental Disorders._