J wave patterns--morphology, prevalence and nomenclature.

Area of Science:

• Cardiology
• Electrophysiology

Background:

• Early repolarization (ER) is experiencing renewed research interest.
• Existing studies show significant variations in ER prevalence.
• This inconsistency stems from differing definitions of the ER pattern.

Purpose of the Study:

• To highlight the impact of definition variations on ER prevalence.
• To compare ER prevalence with Brugada Syndrome prevalence.
• To emphasize the need for standardized measurement definitions in ER research.

Main Methods:

• Review of existing literature on early repolarization definitions and prevalence.
• Comparison of prevalence data based on the inclusion or exclusion of ST elevation.
• Comparative analysis with reported prevalence rates of Brugada Syndrome.

Main Results:

• ER prevalence ranges widely: 35% (males) and 21.5% (females) without ST elevation, versus 3.3% (males) and 0.5% (females) with ST elevation.
• Brugada Syndrome prevalence is low (0.1%-0.2% in Japan), varying geographically.
• Significant discrepancies in reported ER prevalence exist across studies.

Conclusions:

• Inconsistent definitions of early repolarization lead to highly variable prevalence rates.
• Standardization of measurement definitions for early repolarization is urgently required.
• Standardization will improve diagnostic accuracy and comparability in cardiovascular research.