The body surface QRST isointegral maps in infants with right ventricular overload.

Izumida, Naomi; Kiyohara, Koji; Asano, Yuh; Tsuchiya, Shirou; Hosaki, Junro; Kawano, Seiko; Sawanobori, Tohru; Hiraoka, Masayasu

doi:10.1253/jcj.57.123

Cited by 12 publications

(6 citation statements)

References 12 publications

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“…Clinical evaluation of QT dispersion is used for the risk assessment for serious ventricular tachyarrhythmias [27,28]. ARI recorded from epicardial surface reflects local APD quite accurately [18]. Our method was applied from body surface and was not as accurate as the direct recording from the epicardium.…”

Section: Discussionmentioning

confidence: 99%

“…ARI maps are believed to represent the distribution of local action potential duration [18], while BSM is not as accurate as epicardial mapping. Prolonged ARI was noted on upper right anterior chest, which corresponded to the area of conduction delay in VAT map.…”

Section: Discussionmentioning

confidence: 99%

“…If QRS was QS pattern and R wave was absent in some leads, the interval between onset of QRS and the onset of QS on these leads was measured as VAT, which was based on the report by Kasanuki et al [6]. ARI maps were constructed by drawing isochronal lines of ARI values of each lead, which was defined as the interval between the minimum first derivative during QRS and maximum first derivative during ST-T [18] (Fig. 1, right).…”

Section: Methodsmentioning

confidence: 99%

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Changes in body surface potential distributions induced by isoproterenol and Na channel blockers in patients with the Brugada syndrome

Izumida

Asano

Doi

et al. 2004

International Journal of Cardiology

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Changes in body surface potential distributions induced by isoproterenol and Na channel blockers in patients with the Brugada syndrome

Izumida

Asano

Doi

et al. 2004

International Journal of Cardiology

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“…19,20 We previously showed characteristic findings on QRST isointegral maps (QRST-I maps), depending on the type of RV overload in children with congenital heart diseases. 21 The presence of residual RV overload also could be detected using QRST-I maps in postoperative patients with right bundle branch block complications. 22 In this study, we examined BSMs of children with ASD before and after intracardiac repair and evaluated the resolution of depolarization and repolarization abnormalities after reduction of RV volume overload.…”

Section: Introductionmentioning

confidence: 98%

“…BSM is useful not only for detecting local repolarization abnormality but also for discriminating between primary and secondary changes in ventricular recovery properties 19,20 . We previously showed characteristic findings on QRST isointegral maps (QRST‐I maps), depending on the type of RV overload in children with congenital heart diseases 21 . The presence of residual RV overload also could be detected using QRST‐I maps in postoperative patients with right bundle branch block complications 22 …”

Section: Introductionmentioning

confidence: 99%

Resolution of Abnormal Body Surface Maps in Children with Atrial Septal Defect after Intracardiac Repair

Asano

Izumida

Kawano³

et al. 2004

Cardiovasc electrophysiol

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Introduction: The genesis of repolarization abnormalities of ECG waveforms in atrial septal defect (ASD), which typically is characterized by right ventricular (RV) volume overload, has not been explored, particularly in association with postoperative hemodynamic improvement. The aim of this study was to evaluate the effects of reduced RV overload after ASD closure on depolarization and repolarization abnormalities on body surface maps (BSMs). Methods and Results: BSMs of 14 children with ASD were recorded preoperatively and at early postoperative (1–6 months) and late postoperative (>9 months) stages. BSMs of 31 age‐matched healthy children were studied as normal controls. Before intracardiac repair, QRS isopotential maps of children with ASD showed delayed RV breakthrough and subsequent rightward enlargement of the positive area with a maximum shifting to the right. Delayed conduction of the RV, particularly at the outflow tract area, was noted. The preoperative QRST isointegral maps exhibited the two‐maximum pattern reflecting repolarization abnormality. The delayed appearance of breakthrough and delayed RV conduction on the QRS isopotential maps persisted from the preoperative to the late postoperative stage, whereas the two‐maximum pattern on the QRST isointegral maps normalized to the one‐dipole pattern at an early stage after repair. Conclusion: Abnormal repolarization parameters in ASD patients showed rapid improvement postoperatively, despite the persistence of depolarization abnormalities. Therefore, the two‐maximum pattern on the QRST isointegral maps indicates a primary T wave change due to hemodynamic RV volume overload.

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Study on electrode array sheet for electrocardiogram mapping

Uto

Yuno

Wakimoto

World Congress on Medical Physics and Biomedical Engineering 2006

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The body surface QRST isointegral maps in infants with right ventricular overload.

Cited by 12 publications

References 12 publications

Changes in body surface potential distributions induced by isoproterenol and Na channel blockers in patients with the Brugada syndrome

Changes in body surface potential distributions induced by isoproterenol and Na channel blockers in patients with the Brugada syndrome

Resolution of Abnormal Body Surface Maps in Children with Atrial Septal Defect after Intracardiac Repair

Study on electrode array sheet for electrocardiogram mapping

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