Correcting precordial voltage for the distance from the chest wall to the mid-left ventricle improved its correlation with echocardiographically determined left ventricular mass (r=0.846 vs r=0.686).
Cross-Sectional (n=100)
Effect estimate: r = 0.846
This study was undertaken to assess both the relation between echocardiographic measurement of left ventricular (LV) mass and commonly used electrocardiographic criteria for LV hypertrophy and the effect of the distance from the center of LV mass to the anterior chest wall on precordial voltage. Echocardiograms and standard 12-lead electrocardiograms were obtained on 100 persons, ages 3 to 79. The correlation coefficients of echocardiographically determined LV mass with ECG precordial voltage (SV1 + RV5 or V6), the Estes point score system, and a VL4 wave voltage were .686, .721, and .531, respectively. Extrapolating from the dipole nature of the heart, the precrodial voltage was multiplied by the square of the chest wall to mid-LV distance to correct for the loss of energy across the distance from LV to recording electrode. Utilizing this correction, a much improved precordial voltage estimation of LV mass (r = .846) was obtained. We conclude that the distance of the center of LV mass from the chest wall influences the amplitude of recorded precordial voltage and that correction for this influence improved the correlation of precordial voltage with LV mass.
Horton et al. (Tue,) conducted a cross-sectional in Left ventricular mass estimation (n=100). Distance correction for precordial voltage vs. Standard uncorrected ECG criteria was evaluated on Correlation of precordial voltage with echocardiographically determined LV mass (r = 0.846). Correcting precordial voltage for the distance from the chest wall to the mid-left ventricle improved its correlation with echocardiographically determined left ventricular mass (r=0.846 vs r=0.686).
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