Are Palpitations and Tachycardia the Same?
No, palpitations and tachycardia are not the same—palpitations are a subjective symptom (the uncomfortable awareness of one's heartbeat), while tachycardia is an objective finding (heart rate >100 beats per minute). 1, 2
Key Distinctions
Palpitations: A Symptom
- Palpitations represent the patient's subjective perception of an abnormal or uncomfortable awareness of their heartbeat 2, 3, 4
- Patients may describe palpitations as sensations of a rapid, irregular, strong, or "skipped" heartbeat 2, 3
- Palpitations can occur with normal heart rhythms during exercise, emotional stress, or after consuming stimulants (caffeine, nicotine) 3
- Many patients with documented arrhythmias do not experience palpitations, instead presenting with syncope, shock, chest pain, or sudden death 2, 3
Tachycardia: An Objective Finding
- Tachycardia is defined as a heart rate >100 beats per minute, representing an objective electrocardiographic or clinical measurement 1
- Tachycardia can be physiologically appropriate (fever, dehydration, infection) or pathologic (arrhythmia) 1
- Most tachycardias do not cause symptoms unless the rate exceeds 150 beats per minute or ventricular dysfunction is present 1
The Relationship Between the Two
When They Overlap
- Any arrhythmia can cause palpitations, including sinus tachycardia, atrial fibrillation, premature ventricular contractions, or ventricular tachycardia 2, 5
- Patients with supraventricular tachycardia commonly present with palpitations as their primary symptom 6
- Regular palpitations with abrupt onset and termination suggest re-entrant tachycardias (AVNRT, AVRT), while irregular palpitations suggest premature beats, atrial fibrillation, or multifocal atrial tachycardia 6, 7
When They Diverge
- Up to 16% of patients with palpitations have no identifiable cardiac cause 2
- Palpitations can result from non-arrhythmic cardiac conditions (mitral valve prolapse, pericarditis, heart failure) or non-cardiac causes (hyperthyroidism, hypoglycemia, anxiety) 2, 4
- Sinus tachycardia accelerates and decelerates gradually, unlike paroxysmal tachycardias, yet both may produce palpitations 6
Clinical Implications
Diagnostic Approach
- A 12-lead ECG is mandatory for every patient presenting with palpitations to determine if tachycardia or another arrhythmia is present 7
- The rhythm pattern guides diagnosis: regular palpitations suggest re-entrant SVT, while irregular palpitations point toward premature beats or atrial fibrillation 6, 7
- Capture a 12-lead ECG during symptoms whenever possible, as automated interpretation systems are unreliable 6, 7
Risk Stratification
- Palpitations associated with syncope, near-syncope, or hemodynamic instability warrant urgent evaluation for potentially life-threatening arrhythmias 2, 5
- Pre-excitation (Wolff-Parkinson-White pattern) with irregular palpitations indicates atrial fibrillation conducting over an accessory pathway and requires immediate electrophysiology evaluation due to sudden death risk 6, 7
Common Pitfalls to Avoid
- Do not assume palpitations equal tachycardia—many patients with palpitations have normal heart rates or non-tachycardic arrhythmias 2, 3
- Do not dismiss palpitations as benign without proper workup—in one cohort, 67% of patients with unrecognized SVT met criteria for panic disorder, and symptoms were incorrectly attributed to stress 7
- Do not overlook physiologic causes of sinus tachycardia (infection, volume depletion, hyperthyroidism, anemia) when evaluating palpitations 1, 7
- Do not rely solely on patient symptom description—many patients with documented arrhythmias and tachycardia do not report palpitations 2, 3