New Precordial T Wave Inversions in Hospitalized Patients.

Background: The incidence of precordial T changes has been described in athletes and in specific populations, while the etiology in a large patient population admitted to the hospital has not previously been reported.

Methods: All electrocardiograms (ECGs) read by the same physician with new (compared to prior ECGs) or presumed new (no prior ECGs) precordial T wave inversions of >1 mm (0.1 mV) in multiple precordial leads were retrospectively reviewed and various ECG, patient-related, and imaging parameters assessed. A total of 226 patients and their ECGs were initially selected for analysis. Of these, 35 were eliminated leaving 191 for the final analysis.

Results: Patients and their ECGs were divided into 5 groups based on diagnosis and incidence including Wellens syndrome, takotsubo, type 2 myocardial infarction, other (including multiple diagnoses), and unknown. Although subtle differences including number of T inversion leads, depth of T waves, QTc intervals, and other variables were present between some groups, diagnosis in individual cases required appropriate clinical, laboratory, or imaging studies. For example, although Wellens syndrome was identified in <20% of cases, a presenting history of chest discomfort with precordial T changes either on the admission or next-day ECG was highly sensitive and specific for this diagnosis. In some cases, type 2 myocardial infarction can also have a Wellens-like ECG phenotype without significant left anterior descending disease.

Conclusions: Precordial T wave changes in hospitalized patients have various etiologies, and in individual cases, the changes on the ECG alone cannot easily distinguish the presumptive diagnosis and additional data are required.