Esophageal PP intervals for analysis of short-term heart rate variability in patients with atrioventricular block before and after insertion of a temporary ventricular inhibited pacemaker

Hsiao, Hsiang Chiang; Chiu, Hung Wen; Lee, Shiao Chuan; Kao, Tsair; Chang, Hsin Ya; Kong, Chi Woon

doi:10.1016/s0167-5273(98)00078-3

Cited by 11 publications

(11 citation statements)

References 24 publications

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“…Condition also restricted the analysis of HRV is the presence of atrioventricular block because the impulse is not conducted properly to the ventricle, avoiding an analysis of RR intervals [53].…”

Section: Limitations On Usementioning

confidence: 99%

Noções básicas de variabilidade da frequência cardíaca e sua aplicabilidade clínica

Vanderlei

Pastre

Hoshi

et al. 2009

Rev Bras Cir Cardiovasc

638

499

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Autonomic nervous system (ANS) plays an important role in the regulation of the physiological processes of the human organism during normal and pathological conditions. Among the techniques used in its evaluation, the heart rate variability (HRV) has arising as a simple and non-invasive measure of the autonomic impulses, representing one of the most promising quantitative markers of the autonomic balance. The HRV describes the oscillations in the interval between consecutive heart beats (RR interval), as well as the oscillations between consecutive instantaneous heart rates. It is a measure that can be used to assess the ANS modulation under physiological conditions, such as wakefulness and sleep conditions, different body positions, physical training and also pathological conditions. Changes in the HRV patterns provide a sensible and advanced indicator of health involvements. Higher HRV is a signal of good adaptation and characterizes a health person with efficient autonomic mechanisms, while lower HRV is frequently an indicator of abnormal and insufficient adaptation of the ANS, provoking poor patient's physiological function. Because of its importance as a marker that reflects the autonomic nervous system activity on the sinus node and as a clinical instrument to assess and identify health involvements, this study reviews conceptual aspects of the HRV, measurement devices, filtering methods, indexes used in the HRV analyses, limitations in the use and clinical applications of the HRV.Descriptors: Autonomic nervous system. Heart rate. Parasympathetic nervous system. Sympathetic nervous system. ResumoO sistema nervoso autônomo (SNA) desempenha um papel importante na regulação dos processos fisiológicos do organismo humano tanto em condições normais quanto patológicas. Dentre as técnicas utilizadas para sua avaliação, a variabilidade da frequência cardíaca (VFC) tem emergido como uma medida simples e não-invasiva dos impulsos autonômicos, representando um dos mais promissores marcadores quantitativos do balanço autonômico. A VFC descreve as oscilações no intervalo entre batimentos cardíacos consecutivos (intervalos R-R), assim como oscilações entre frequências cardíacas instantâneas consecutivas. Trata-se de uma medida que pode ser utilizada para avaliar a modulação do SNA sob condições fisiológicas, tais como em situações de vigília e sono, diferentes posições do corpo, treinamento físico, e também em condições patológicas. Mudanças nos padrões da VFC fornecem um indicador sensível e antecipado de comprometimentos na

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Section: Limitations On Usementioning

confidence: 99%

Noções básicas de variabilidade da frequência cardíaca e sua aplicabilidade clínica

Vanderlei

Pastre

Hoshi

et al. 2009

Rev Bras Cir Cardiovasc

638

499

View full text Add to dashboard Cite

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“…The analysis of the ventricular rate variability permits the study of the mechanisms implied in its control 3,11 . If both, atrial and ventricular rhythms are known (PP and RR series), the analysis of atrial rate variability and its relationships with ventricular variability can be studied for this pathology.…”

Section: Figure 1 Electrocardiographic Signal Showing Type III Avb mentioning

confidence: 99%

“…Therefore, P-wave detectors based on relative positions between R and P waves cannot be used 13,25,27 . Esophageal or intracavitarial electrodes have been used to obtain an isolated atrial activity that allows the P wave 11 to be detected. When noninvasive electrocardiographic surface leads are used (as in Holter records), other techniques such as pattern detection fail when the P wave is overlapped with the QRS complex or the T wave 10 .…”

Section: Figure 1 Electrocardiographic Signal Showing Type III Avb mentioning

confidence: 99%

P and R Wave Detection in Complete Congenital Atrioventricular Block

et al. 2008

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Complete atrioventricular block (type III AVB) is characterized by an absence of P wave transmission to ventricles. This implies that QRS complexes are generated in an autonomous way and are not coordinated with P waves. This work introduces a new algorithm for the detection of P waves for this type of pathology using non-invasive electrocardiographic surface leads.The proposed algorithm is divided into three stages. In the first stage, the R waves located by a QRS detector are used to generate the RR series and time references for the other stages of the algorithm. In the second stage, the ventricular activity (QT segment) is removed by using an adaptive filter that obtains an averaged pattern of the QT segment. In the third stage, a new P wave detector is applied to the residual signal obtained after QT cancellation in order to detect P wave locations and get the PP time series.Eight Holter records from patients with congenital type III AVB were used to verify the proposed algorithm. Although further improvements should be made to improve the algorithm's performance, the results obtained show high average values of sensitivity (90.52 %) and positive prediction (90.98%). KeywordsComplete congenital atrioventricular block, P and R wave detection, QRS, adaptive impulse correlated filter, SNEO.2 2

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“…An esophageal lead was used to non-invasively record the atrial ECG, PP intervals on the atrial ECG were acquired with the method used in a previous study [6].…”

Section: Methodsmentioning

confidence: 99%

“…Simantirakis et al indicated that AV delay might change the HRV in patients with heart failure, paced under VDD mode [5]. Recently, we used the PP intervals obtained from an esophageal lead for analysis of HRV in patients with AV block [6]. It was shown that AV block patients had ARV differing from normal subjects.…”

Section: Introductionmentioning

confidence: 99%

Atrial rate variations in atrioventricular block patients: influences of ventricular rate and atrioventricular delay

Chiu

Kao

Hsiao

et al.

Computers in Cardiology 1999. Vol.26 (Cat. No.99CH37004)

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Atrial rate variations (AR v) of nine atrioventricular (AV) block patients loaded with VDD pacemakers were analyzed with pacemaker-of mode, programmed at different fuced ventricular pacing rates (60, 90, 120 bpm) and with different AV delays in VDD pacing (80, 120, 160, 200 ms) to stu& the infuences of ventricular rate and AV delay. ARV were measured by PP intervals on the atrial electrocardiogram (ECG) that was non-invasive& recordedfrom an esophageal lead In results, all ARV measures had no signiJicant dtference under d@erent AV delays. Although no sign$cant difference existed among all ARV frequency domain measures, the locations of the major powers were very diverse for diflerent individuals under diflerent pacing rates. Howevec during pacemakeroff mode, the major spectral powers of ARV were centered on the band above 0.4 Hz.

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Esophageal PP intervals for analysis of short-term heart rate variability in patients with atrioventricular block before and after insertion of a temporary ventricular inhibited pacemaker

Cited by 11 publications

References 24 publications

Noções básicas de variabilidade da frequência cardíaca e sua aplicabilidade clínica

Noções básicas de variabilidade da frequência cardíaca e sua aplicabilidade clínica

P and R Wave Detection in Complete Congenital Atrioventricular Block

Atrial rate variations in atrioventricular block patients: influences of ventricular rate and atrioventricular delay

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