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European Heart Journal 1987 8(6):587-591;
Copyright © 1987 by the European Society of Cardiology.
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© 1987 The European Society of Cardiology

Factors affecting the relationship between precordial electrocardiographic voltage and left ventricular wall thickness

M. DANCY*

Cardiac Department, St George‘s Hospital Blackshaw Road, London SW17 0QT, U.K.

Received 13 August 1986; revised 22 December 1986; .

*Present address: Cardiac Department, Central Middlesex Hospital, Acton Lane, London NW10 7NS, England.

Abstract

The relationship between left ventricular wall thickness and precordial electrocardiographic voltage was explored in thirty male subjects to determine the influence of two independent variables, precordial lead positions and skin thickness. The correlation coefficient of the relationship between Sv2 + Rv3 and mean left ventricular wall thickness was 0.41. When the precordial voltages were measured from two modified leads, one parasternal and one apical, whose positions were determined by locating the heart with ultrasound, the correlation coefficient was 0.57.

Using multiple regression, a significant relationship was demonstrated between chest wall thickness and precordial voltage, and this relationship was explained by variations in skin thickness measured by calipers. The relationship between left ventricular wall thickness and precordial voltage is significantly influenced by skin thickness and lead placement.

Key Words: Ventricular hypertrophy • electrocardiograph • constitutional variables.


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