A Phi-based electrocardiographic index predicting small left ventricular mass alterations. Influence of hypertension, overweight, and sex

Un índice electrocardiográfico basado en Phi previendo pequeñas alteraciones de la masa ventricular izquierda. Influencia de la hipertensión, sobrepeso, y el sexo

Abstract

Background: The current cutoff value for left ventricular hypertrophy (LVH) does not accurately discriminate against minor changes in ventricular mass. Objective: To verify whether an electrocardiographic index can detect a 15 % increase in left ventricular mass (LVM) based on ideal chest diameter (ICD) using a Phi-based formula approach. Methodology: We assessed the records of 471 patients undergoing routine cardiac check-ups in a cross-sectional study, grouped by hypertension, overweight, and sex. The index was the sum of the leads (DI, DII, DIII), with a threshold of less than 23 mm. The ideal cardiothoracic diameter (ICD) was defined as height(H)/8.1 for men and H/7.8 for women. The LVM was calculated as 16*((ICD/10)^3). The groups were compared using the Chi-Square test, T-test, and logistic multinomial regression, as appropriate.