A study on detecting high frequency components of QRS complex by subtraction method and its application for intraventricular conduction disturbance.

Q: What does this research mean for the field?

High-frequency components of the QRS complex, detected via a subtraction method, can differentiate modes of intraventricular excitation propagation by revealing that normal conduction has short duration and large potential fluctuations, whereas conduction disturbances exhibit prolonged duration and smaller fluctuations. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Toshihiko Nanke

doi:10.5105/jse.13.301

January 1, 1993Japanese Journal of ElectrocardiologyOpen Access

A study on detecting high frequency components of QRS complex by subtraction method and its application for intraventricular conduction disturbance.

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Why the study?

Can the subtraction method for detecting high-frequency QRS components differentiate modes of intraventricular excitation propagation?

Structured PICO

Can the subtraction method for detecting high-frequency QRS components differentiate modes of intraventricular excitation propagation?

P

Population

Healthy individuals, cases with right and left bundle branch block, and cases with right and left bundle branch block-type ventricular premature contractions

I

Intervention

Detection of high-frequency components of QRS complex using the subtraction method

C

Comparator

Comparison among healthy individuals and patients with different conduction disturbances

O

Outcome

Morphological changes, duration, and amplitude of high-frequency components within the QRS intervalsurrogate

The subtraction method for detecting high-frequency QRS components can successfully differentiate normal from abnormal intraventricular excitation propagation modes.

Implication

Subtraction of high-frequency QRS components may differentiate normal from abnormal conduction; leaves open prospective validation before clinical use.

Abstract

QRS区間内の微小高周波成分を検出し, その経時的な形態変化から心室内興奮伝播様式の解析を行った.検出には時間情報の歪みが小さく, 濾波特性の変更が容易なsubtraction法を用い最適な濾波特性を求めた.対象は健常例 (N群) , 右, 左脚ブロック例 (R, L群) , 右, 左脚ブロック型心室期外収縮例 (VR, VL群) とした.N群は初期低振幅, 中期高振幅, 後期低振幅の3成分を形成した.R群はN群より中期の振幅は低く, 後期の持続時間は延長した.L群は中, 後期の分離は不明瞭で, 持続時間は著明に延長し振幅は低値を示した.VR, VL群は初期の持続時間は延長し振幅は低値を示した.以上より伝導系を介する興奮は持続時間は短く, 電位変動が大で高周波成分を多く含んでいた.伝導障害, 興奮発生・進行の異常による心室筋内伝導の場合は持続時間は延長し, 電位変動が小さいと考えられた.本研究により心室内興奮伝播様式の鑑別が可能と考えられた.

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Cite This Study

Toshihiko Nanke (1993) studied this question.

synapsesocial.com/papers/6a1bd50127b545b111a9182e https://doi.org/10.5105/jse.13.301

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A study on detecting high frequency components of QRS complex by subtraction method and its application for intraventricular conduction disturbance.

Structured PICO

Implication

Abstract

Discussion

Cite This Study

A study on detecting high frequency components of QRS complex by subtraction method and its application for intraventricular conduction disturbance.

Structured PICO

Implication

Abstract

Discussion

Cite This Study

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