Diagnostic Approach and Management of Palpitations

Initial Evaluation and Diagnostic Testing

The European Society of Cardiology recommends obtaining a detailed history focusing on the nature of palpitations, associated symptoms, and potential triggers for patients presenting with palpitations 1, 2
A 12-lead ECG should be performed during the initial evaluation to identify any baseline abnormalities or capture the arrhythmia if present during the visit, as recommended by the European Heart Journal 3, 4
The American College of Cardiology recommends assessing for signs of hemodynamic instability, which would require immediate intervention 5
Patients with symptoms suggesting serious underlying conditions, such as syncope, near-syncope, dyspnea, or chest pain, should be thoroughly evaluated, according to the Journal of the American College of Cardiology 6, 2

The European Heart Journal recommends 48-hour ambulatory ECG monitoring as the first-line diagnostic test for patients with frequent or sustained palpitations 1
For patients with less frequent episodes, an event recorder or wearable loop recorder may be considered, as suggested by the European Heart Journal 3, 7
Echocardiography should be performed to exclude structural heart disease, especially in patients with sustained palpitations or concerning associated symptoms, according to the Journal of the American College of Cardiology and Circulation 6, 4

The American College of Cardiology recommends guideline-directed medical therapy for patients with documented supraventricular tachycardia (SVT), which may include vagal maneuvers, beta-blockers, or catheter ablation 4, 6
Patients with atrial fibrillation require appropriate management with either rate control or rhythm control strategies, and assessment of stroke risk, as recommended by Circulation 4
The American College of Cardiology suggests that patients with ventricular arrhythmias should receive guideline-directed medical therapy, and those with sustained ventricular tachycardia require hospitalization for initiation of antiarrhythmic therapy 4

Patients with palpitations and syncope require more urgent evaluation, including 12-lead ECG, exercise testing, and 48-hour ambulatory ECG monitoring, as recommended by the European Heart Journal 1, 3
The American College of Cardiology recommends prompt referral to an arrhythmia specialist for patients with palpitations associated with severe symptoms, such as syncope or dyspnea 6

The American College of Cardiology and Circulation recommend referral to cardiology/electrophysiology for patients with palpitations and syncope, evidence of structural heart disease, or documented complex arrhythmias 6, 4, 1, 3

Stress testing is most valuable when palpitations occur primarily during or immediately after physical exertion, as recommended by the American Heart Association and the American College of Cardiology 8, 9
Patients with palpitations and syncope/presyncope during exertion should undergo exercise stress testing in a controlled environment with proper advanced life support, according to the American College of Cardiology 10, 8

The primary goal of exercise stress testing is to reproduce the patient's symptoms during controlled exercise to correlate with ECG findings, as stated by the American College of Cardiology 10, 9
Exercise testing can identify ischemia-driven arrhythmias that manifest only during increased cardiac demand, as noted by the American College of Cardiology and the American Heart Association 10, 8
Limitations of exercise stress testing include a low diagnostic yield when palpitations are infrequent or not reproducible during testing, as reported by the European Society of Cardiology and the American College of Cardiology 11, 12

Exercise stress testing should be performed in a controlled environment with proper advanced life support when evaluating exertional palpitations, as recommended by the American College of Cardiology and the American Heart Association 10, 8
The choice of monitoring duration and type should match the frequency of symptoms, according to the American College of Cardiology 12
Mobile cardiac outpatient telemetry is a suitable option for infrequent but concerning symptoms, as suggested by the American College of Cardiology 12

Coughing acts as a vagal maneuver to interrupt the arrhythmia, similar to the Valsalva maneuver, potentially terminating reentrant supraventricular tachycardia (SVT) by increasing vagal tone and slowing AV nodal conduction, as described by the American Heart Association 13

The American College of Cardiology recommends teaching vagal maneuvers (Valsalva, carotid massage) as first-line acute management for supraventricular tachycardia (SVT), since the patient has already demonstrated response to vagal stimulation via coughing 13