Influence of the Main Filter on QRS-amplitude and Duration in Human Electrocardiogram.
MetadataShow full item record
Accurate measurement of electrocardiograms (ECG) is critical for effective diagnosis of patient’s cardiac functions. Detailed examination of filters’ effects on ECG accuracy, reproducibility and robustness covering a wide range of available commercial products can provide valuable information on the relationship between quality and effectiveness of filters, and assessments of patients’ cardiac functions. In this study, ECG device with 12 leads and built-in filters used for ECG measurements was assessed on human volunteers. Results showed that with respect to measuring QRS wave duration and R-amplitude variation, there was a 4 % inaccuracy when the main filter was ON and OFF, and R-amplitude variation was most pronounced in the V4 lead. Accordingly, variability of R-amplitude and length of QRS wave can be reduced by the use of appropriate lead, and filter activation during the ECG assessment.
Showing items related by title, author, creator and subject.
Gao, Jason (2002)Carrierless amplitude and phase (CAP) modulation is generally regarded as a bandwidth efficient two-dimensional (2-D) passband line code. It is closely related to the pulse amplitude modulation (PAM) and quadrature amplitude ...
Filtering methods to extract the tide height from Global Navigation Satellite Systems (GNSS) signals for Hydrographic applicationsAlsaaq, Faisal; Kuhn, Michael; El-Mowafy, Ahmed ; Kennedy, Paul (2016)Hydrographic surveys have traditionally relied on the availability of tide information for the reduction of sounding observations to a common (chart) datum usually related to a specific tide level. In most cases, tide ...
Clark, D.; Ristić, B.; Vo, Ba-Ngu; Vo, Ba Tuong (2010)In many tracking scenarios, the amplitude of target returns are stronger than those coming from false alarms. This information can be used to improve the multiple-target state estimation by obtaining more accurate target ...