Signal averaged electrocardiogram SAECG in patients with normal hearts

ABSTRACT

This work aimed to detect the quantitative parameters of signal averaged electrogram in patients without heart disease. 50 patients, admitted in Al-Husain University Hospital for non-cardiac problem, who had normal cardiovascular examination and resting electrogram were included in this study in the period between October and December 1995. Signal averaged electrogram [SAECG] was detected in time domain using PPG Hellige [model EK 56]. The band pass filter was set at 40 HZ, correlation coefficient 98%, 200 cycles and 1.O uV noise end point. Late potential analysis was performed on the orthogonal leads X, Y and Z. C1 was put on the back opposite the site of C2, potential different between C1 and C2 results in z. C3 site is below the clavicle in a parasternal position, potential difference between C3 and C4 results in Y. C5 site is in the fifth intercostal space at right mid axillary line, potential difference between C5 and C6 results in X. Careful skin preparation and adhesive electrodes were attached just before recording the SAECG