Abstract 2652: Another Normal Variant With ST Elevation and Inverted T Wave Mimicking ST-elevation Myocardial Infarction: The Prevalence, Age and Gender Distribution
Background: Early repolarization pattern (ERP) is a well known normal variant. There is another kind of ST elevation in the mid precordial leads as a normal variant (Fig 1⇓), which is distinctively different from ERP in that the T waves are inverted in these leads while they are upright and tall in ERP. These findings can be easily mistaken for myocardial infarction (MI) or pericarditis. The purpose of this study is to popularize this entity and to determine its prevalence, age and gender distributions.
Methods: All ECGs taken at Hennepin Medical Center in Minneapolis in 2007 were reviewed personally by the first author and individuals with these ECG findings were identified: 1–3 mm ST elevation ending with an inverted T wave in mid precordial leads with preserved R waves. (Acute anterior MI would be associated with Q waves in these leads by the time T waves are inverted).
Results: 11424 individuals (5997 men, 5427 women) had one or more ECGs in 2007. This entity was seen in 101 individuals, 97 (96%) of whom were black (77 men, 20 women). 77 of 2084 (3.7%) black men and 20 of 2020 (1%) black women had the entity. The prevalence according to race and gender are shown in Figure 1⇓.
Conclusions: This entity is seen almost exclusively in blacks (3.7% of men, 1% of women), and is evenly distributed throughout the age.