In a 24-year-old male with anxiety (GAD‑7 score 4) who presents with brief palpitations on awakening and an ECG showing normal sinus rhythm with sinus arrhythmia, borderline PR interval, normal QRS and QTc, and possible right‑ventricular conduction delay (RSR′ in V1/V2), what is the appropriate management?

Management of Palpitations in a Young Adult with Anxiety and Benign ECG Findings

This patient requires reassurance and anxiety management rather than cardiac workup, as his ECG shows only benign findings (sinus arrhythmia and possible incomplete RBBB) and his presentation is classic for anxiety-related palpitations in the context of known anxiety disorder.

ECG Interpretation and Risk Stratification

Your patient's ECG findings are reassuring and do not indicate pathology requiring intervention:

• The sinus arrhythmia is a normal variant, particularly common in young adults and often exacerbated by anxiety 1
• The borderline PR interval (198 ms) does not meet criteria for first-degree AV block (which requires >200 ms) and has no clinical significance 1
• The RSR' pattern in V1/V2 with QRS duration of 98 ms represents incomplete right bundle branch block, which is a benign finding in young adults without structural heart disease 1
• All other intervals (QRS 98 ms, QTc 372 ms) are completely normal 1

Clinical Context Strongly Suggests Anxiety-Related Palpitations

Several features point away from arrhythmia and toward anxiety as the primary etiology:

• Patients with anxiety disorders are significantly more likely to report palpitations without demonstrable cardiac arrhythmias 2, 3
• His GAD-7 score of 4 indicates mild anxiety symptoms, though this may underestimate his burden given his history of declining SSRI treatment and requiring CBT 4
• Palpitations occurring upon awakening are characteristic of panic disorder, which was found in 27.6% of patients presenting with palpitations in one study 3
• Patients with panic disorder describe palpitations as "racing" or "pounding" and are more likely to be awakened by them, yet their 24-hour monitoring shows no more arrhythmias than controls 3
• His previous workup in [DATE] already demonstrated only benign findings (sinus arrhythmia with occasional PVCs and early repolarization), making new pathology unlikely 5

Recommended Management Algorithm

Immediate Management (Today's Visit)

Provide direct reassurance based on objective findings:

• Explain that his ECG is normal for his age and shows no dangerous rhythms 5
• Clarify that sinus arrhythmia is a normal variant, not a disease 1
• Explain that the RSR' pattern is an incomplete bundle branch block, which is benign in young people without heart disease 1

Do NOT order additional cardiac testing at this time because:

• His symptoms are brief, isolated, and not associated with syncope, near-syncope, or chest pain 5
• Ambulatory monitoring is indicated when palpitations are unpredictable or daily, but his single episode this morning does not meet this threshold 5
• Up to 16% of patients with palpitations have no identifiable cause, and extensive workup in anxious patients often reinforces health anxiety 5

Short-Term Management (Next 2-4 Weeks)

Address the underlying anxiety disorder:

• His anxiety is undertreated—a GAD-7 score of 4 with PHQ-9 of 7 and previous refusal of SSRIs suggests suboptimal management 4, 6
• Restart the conversation about pharmacotherapy, specifically SSRIs (first-line for generalized anxiety disorder) or SNRIs 6
• Ensure he is engaged in evidence-based psychotherapy, particularly cognitive behavioral therapy or third-wave CBT, which have proven efficacy for generalized anxiety disorder 6

Provide symptom monitoring instructions:

• If palpitations recur and are associated with dizziness, near-syncope, syncope, or chest pain, he should seek immediate evaluation 5
• If palpitations become daily or unpredictable and frequent, consider 2-week event monitoring (more cost-effective than Holter for intermittent symptoms) 5

Follow-Up Strategy

Schedule follow-up in 2-4 weeks to:

• Reassess anxiety symptoms with repeat GAD-7 and PHQ-9 4
• Evaluate response to anxiety treatment if initiated 6
• Determine if palpitations have recurred and their pattern 5

Common Pitfalls to Avoid

• Do not over-investigate benign palpitations in anxious patients, as this reinforces illness behavior and health anxiety 2, 3
• Do not dismiss the patient's concerns—acknowledge that palpitations feel real and uncomfortable, but explain they are not dangerous 2
• Do not ignore the previous cardiologist's advice to return for chest pain, palpitations, or dyspnea—this was appropriate for initial evaluation but does not mean every palpitation requires ER evaluation 5
• Recognize that patients with anxiety have poor heartbeat perception accuracy despite heightened awareness, meaning their symptom reports may not correlate with actual arrhythmias 2, 3