What question did this study set out to answer?

This study aims to establish normal p wave values from signal-averaged electrocardiograms and assess the reproducibility of measurements.

November 1, 1996Pacing and Clinical Electrophysiology

Analysis of the P Wave in the Signal‐Averaged Electrocardiogram: Normal Values and Reproducibility

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Why the study?

How do different filter techniques affect the normal values and reproducibility of P wave analysis in signal-averaged electrocardiograms?

Population

40 healthy volunteers, ages 23-37 years

Comparison

Signal-averaged electrocardiogram of the p wave… vs Comparison among the different filter techniques

Design

Cohort

Follow-up

1 month

Authors

MHMonika HofmannUniversity of Pisa LGL Goedel-MeinenDeutsches Herzzentrum München ABANGELIKA BECKHOFFDeutsches Herzzentrum München

Discussion

Member takes

Implication

P-wave duration on SAECG varies by filter; leaves open standardized protocols before clinical or research adoption.

Key Points

This study aims to establish normal p wave values from signal-averaged electrocardiograms and assess the reproducibility of measurements.
Performed p wave analysis on 40 healthy volunteers using different filtering methods.
Repeated measurements after 1 week and 1 month to verify reproducibility.
Evaluated p wave duration and derived parameters using unidirectional, bidirectional, FIR, and LSQ filters.
Average p wave durations varied significantly across filter techniques: unidirectional 135 ± 7 ms, bidirectional 97 ± 8 ms, FIR 109 ± 8.5 ms, LSQ 126 ± 10 ms (P = 0.001).
Reproducibility of the data analyzed with the Simson method was good (R = 0.80-0.91).
FIR and LSQ filtering methods exhibited considerably greater variability in measurements.

Structured PICO

How do different filter techniques affect the normal values and reproducibility of P wave analysis in signal-averaged electrocardiograms?

Population

40 healthy volunteers, ages 23-37 years

Intervention

Signal-averaged electrocardiogram (SAECG) of the p wave analyzed with Simson method (unidirectional and bidirectional filters), finite impulse response (FIR), and least squares fit (LSQ) filters

Comparator

Comparison among the different filter techniques

Outcome

Duration of the p wave and reproducibility of measurementssurrogate

Different filtering techniques yield significantly different normal values for P wave duration on SAECG, with the Simson method providing the most reproducible results.

Cite This Study

Hofmann et al. (1996) studied this question.

synapsesocial.com/papers/6a718b1af44fa9f079df5331 https://doi.org/10.1111/j.1540-8159.1996.tb03255.x

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Analysis of the P Wave in the Signal‐Averaged Electrocardiogram: Normal Values and Reproducibility

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Analysis of the P Wave in the Signal‐Averaged Electrocardiogram: Normal Values and Reproducibility

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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