Does this patient with palpitations have a cardiac arrhythmia?

Area of Science:

• Cardiology
• Diagnostic Accuracy
• Clinical Medicine

Background:

• Palpitations are a common patient complaint presenting to general practitioners.
• Distinguishing benign causes from significant cardiac arrhythmias can be challenging.
• Clinical examination may offer diagnostic clues but requires careful interpretation.

Purpose of the Study:

• To systematically review the diagnostic accuracy of patient history, physical examination, and cardiac testing for identifying cardiac arrhythmias in patients experiencing palpitations.
• To assess the reliability of clinical features in diagnosing or excluding significant arrhythmias.

Main Methods:

• A comprehensive literature search of MEDLINE and EMBASE databases was conducted for English-language articles published between 1950 and 2009.
• Studies comparing clinical features and diagnostic tests against a reference standard for cardiac arrhythmia were selected.
• Seven studies were included for accuracy analysis and 16 for diagnostic yield analysis, with data extracted and quality assessed by multiple reviewers.

Main Results:

• A history of cardiac disease, palpitations during sleep or work, and neck pulsations slightly increase arrhythmia likelihood.
• History of panic disorder or short-duration palpitations decrease arrhythmia likelihood.
• A regular rapid-pounding sensation in the neck strongly suggests atrioventricular nodal reentry tachycardia, but its absence does not rule it out. Loop monitors offer the highest diagnostic yield (34%-84%) for arrhythmia detection.

Conclusions:

• While specific neck sensations can suggest certain arrhythmias like atrioventricular nodal reentry tachycardia, clinical examination alone is insufficient to exclude significant cardiac arrhythmias in most patients.
• Recurrent palpitations often necessitate prolonged electrocardiographic monitoring with symptom-rhythm correlation for accurate diagnosis.
• The diagnostic yield of electrocardiographic monitoring varies based on modality, duration, and symptom occurrence during monitoring.