Prognostic value of automatically detected early repolarization.

Area of Science:

• Cardiology
• Electrocardiography
• Public Health

Background:

• Early repolarization (ER) is linked to sudden cardiac death, defined by specific ECG criteria.
• Automated electrocardiographic readings (AER) include ST-segment elevation, potentially causing clinical alarm.
• The prognostic significance of AER, especially across diverse populations, requires investigation.

Purpose of the Study:

• To determine the prevalence of AER in a large, diverse patient cohort.
• To assess the prognostic significance of AER concerning all-cause mortality.
• To evaluate if AER findings warrant additional diagnostic testing.

Main Methods:

• A retrospective analysis of 211,920 patients (aged 18-75) from a tertiary medical center.
• Inclusion of the first ECG from 2000-2012, excluding specific conditions like acute coronary syndrome.
• Cardiologist review of AER accuracy and Cox proportional hazards modeling for mortality risk.

Main Results:

• AER was detected in 1.6% of subjects, with significant variations in prevalence by race and gender.
• No significant difference in mortality was observed between patients with and without AER.
• This lack of association with mortality persisted even with the presence of J waves.

Conclusions:

• Automated electrocardiographic readings of early repolarization are not associated with an increased risk of death.
• Prevalence of AER differs across racial and gender groups but does not impact mortality risk.
• AER should not independently trigger further diagnostic investigations in clinical practice.