I feel a trembling sensation in my chest; could this be premature ventricular contractions (PVCs) and what evaluation and management steps are recommended?

Evaluation and Management of Chest Trembling Sensation from PVCs

If you're experiencing a trembling or shaking sensation in your chest that could be PVCs, you need a 12-lead ECG and exercise stress test as the minimum initial evaluation, with an echocardiogram strongly recommended to exclude structural heart disease before determining if these are benign. 1

Understanding Your Symptoms

A trembling or shaking sensation in the chest can indeed be caused by PVCs. These are premature heartbeats originating from the ventricles that create an abnormal contraction pattern. The sensation you're feeling is likely the combination of:

• The premature beat itself (often with a shorter coupling interval)
• The compensatory pause that follows
• The forceful beat after the pause (which occurs because the ventricle has more time to fill)

PVCs are extremely common—occurring in 50% of people during long-term monitoring—but their significance depends entirely on whether you have underlying heart disease and how your heart responds to them. 2

Initial Evaluation Algorithm

Step 1: Mandatory Basic Testing

You must obtain:

• 12-lead ECG to characterize the PVC morphology, origin, and complexity 1
• Exercise stress test to see if PVCs suppress with exercise (a reassuring sign) or increase (concerning) 1
• Echocardiogram to rule out structural abnormalities and assess left ventricular function 1

Step 2: Risk Stratification Based on Initial Results

Low-risk features (likely benign):

• PVCs that suppress with exercise 1
• Normal echocardiogram
• No symptoms beyond palpitations
• Right ventricular outflow tract origin (LBBB morphology with inferior axis) 3

High-risk features requiring further evaluation:

• PVCs that increase with exercise or convert to runs of non-sustained VT 1
• Any structural heart disease on echo
• Reduced left ventricular ejection fraction
• Symptoms of presyncope, syncope, or significant dyspnea 1

Step 3: Extended Monitoring if Indicated

24-hour Holter monitor is critical to quantify PVC burden 3, 1:

• <100 PVCs/24 hours: 0% risk of structural heart disease 3
• <2,000 PVCs/24 hours: 3% risk of structural heart disease 3
• ≥2,000 PVCs/24 hours: 30% risk of underlying structural heart disease 3

If you have ≥2,000 PVCs per day, episodes of non-sustained VT, or increasing ectopy during exercise, you need cardiac MRI and possibly electrophysiology study. 3

Management Strategy

For Benign PVCs (Low-Risk Features)

If your Holter and echocardiogram are normal and PVCs suppress with exercise, no further evaluation or treatment is needed—simple reassurance is appropriate. 3, 2

For Symptomatic PVCs with Normal Heart Function

First-line options are either β-blockers or non-dihydropyridine calcium channel blockers (verapamil/diltiazem). 2 Patient preference determines which to try first between medical therapy and catheter ablation.

For High PVC Burden (>10,000-20,000/day) or Reduced LVEF

This suggests possible PVC-induced cardiomyopathy, which is reversible with treatment. 2, 4 Both medical suppression and catheter ablation are first-line therapies, with ablation being more definitive but carrying upfront procedural risks.

Critical Pitfalls to Avoid

1. Don't assume all chest sensations are from PVCs: Only 33.6% of patients with frequent PVCs who experience palpitations have symptoms directly correlated with their PVCs 5. Anxiety is present in 44.4% of symptomatic patients versus 14.4% of asymptomatic patients 5.

2. Don't rely on detraining as diagnostic or therapeutic: Although some studies suggested PVC regression with detraining indicates good prognosis, this has not been confirmed and is not recommended 3.

3. Don't ignore high PVC burdens even if asymptomatic: Very frequent PVCs (>10,000-20,000/day) can cause reversible cardiomyopathy 2, 4.

4. Don't use Class I antiarrhythmic drugs (like flecainide) in patients with structural heart disease or prior MI: These increase mortality risk 6.

When to Refer to Electrophysiology

Refer if:

• ≥2,000 PVCs per 24 hours with structural heart disease concerns 3
• Non-sustained VT episodes 3
• Reduced LVEF potentially from PVCs 2
• Failed medical therapy or patient preference for ablation 2
• QRS duration >160 ms in RVOT-origin PVCs (possible early ARVC) 3

The key distinction is whether your PVCs occur in isolation in a structurally normal heart (usually benign) versus in the presence of cardiac abnormalities (potentially serious). 1 The evaluation pathway above will make this determination systematically.