Distance correction in the electrocardiographic estimation of left ventricular mass

Machado, Rogelio A.; Vázquez, M Lestón; Nordaby, Roberto A.; Campo, Anibal; Esper, Ricardo J.

doi:10.1016/j.jelectrocard.2004.09.011

Cited by 2 publications

(2 citation statements)

References 25 publications

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“…A handful of studies, in non-athletic populations, have explored the relation between surface ECG voltage and the impact of the CWLV distance 5–7 15. In an early study by Horton et al ,5 100 subjects (54% male) aged 3–79 years were included, of whom only 25 were free from cardiovascular disease.…”

Section: Discussionmentioning

confidence: 99%

“…In the following years, a Japanese paediatric centre published two studies in subjects <18 years of age, where they found the square of CWLV PLAX multiplied by the sum of SV1+RV5 or V6 to be positively associated with LVM in boys (r=0.712) and in girls (r=0.469) 6 7. More recently, Machado et al 15 examined 220 adults (43% male) aged 20–85 years of whom 175 were free from cardiovascular disease. They found that CWLV PLAX was an independent predictor of LVM in a model including ECG voltage and anthropometric variables, although most of the variability could be explained by BMI.…”

Section: Discussionmentioning

confidence: 99%

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Impact of the distance from the chest wall to the heart on surface ECG voltage in athletes

Hedman

Patti

Moneghetti

et al. 2020

BMJ Open Sport Exerc Med

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ObjectiveAvailable ECG criteria for detection of left ventricular (LV) hypertrophy have been reported to have limited diagnostic capability. Our goal was to describe how the distance between the chest wall and the left ventricle determined by echocardiography affected the relationship between ECG voltage and LV mass (LVM) in athletes.MethodsWe retrospectively evaluated digitised ECG data from college athletes undergoing routine echocardiography as part of their preparticipation evaluation. Along with LV mass and volume, we determined the chest wall–LV distance in the parasternal short-axis and long-axis views from two-dimensional transthoracic echocardiographic images and explored the relation with ECG QRS voltages in all leads, as well as summed voltages as included in six major ECG-LVH criteria.Results239 athletes (43 women) were included (age 19±1 years). In men, greater LV–chest wall distance was associated with higher R-wave amplitudes in leads aVL and I (R=0.20 and R=0.25, both p<0.01), while in women greater distance was associated with higher R-amplitudes in V5 and V6 (R=0.42 and R=0.34, both p<0.01). In women, the chest wall–LV distance was the only variable independently (and positively) associated with R V5 voltage, while LVM, height and weight contributed to the relationship in men.ConclusionsThe chest wall–LV distance was weakly associated with ECG voltage in athletes. Inconsistent associations in men and women imply different intrathoracic factors affecting impedance and conductance between sexes. This may help explain the poor relationship between QRS voltage and LVM in athletes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%