Letter by Chhabra et al Regarding Article, “Prevalence and Prognostic Significance of Abnormal P Terminal Force in Lead V1 of the Electrocardiogram in the General Population”

Eranti et al1 report an interesting correlation between an underappreciated electrocardiogram parameter, that is, P terminal force (PTF), and mortality. Indeed, PTF magnitude ≥0.04 mm·ms, if present along with an interatrial block (P-wave duration >110 ms), is considered highly specific and reasonably sensitive for diagnosing left atrial enlargement.2 The determination of PTF is restricted to lead V1, wherein lead placement error has a significant potential …