Integral value of JT interval in magnetocardiography is sensitive to coronary stenosis and improves soon after coronary revascularization

Kei On; Shigeyuki Watanabe; Satsuki Yamada; Noriyuki Takeyasu; Yoshitsugu Nakagawa; Hidetaka Nishina; Takafumi Morimoto; Hideaki Aihara; Taizo Kimura; Yoko Sato; Keiji Tsukada; Akihiko Kandori; Tsuyoshi Miyashita; Kuniomi Ogata; Daisuke Suzuki; Iwao Yamaguchi; Kazutaka Aonuma

doi:10.1253/circj.71.1586

Integral value of JT interval in magnetocardiography is sensitive to coronary stenosis and improves soon after coronary revascularization

Kei On, Shigeyuki Watanabe, Satsuki Yamada, Noriyuki Takeyasu, Yoshitsugu Nakagawa, Hidetaka Nishina, Takafumi Morimoto, Hideaki Aihara, Taizo Kimura, Yoko Sato, Keiji Tsukada, Akihiko Kandori, Tsuyoshi Miyashita, Kuniomi Ogata, Daisuke Suzuki, Iwao Yamaguchi, Kazutaka Aonuma

Cardiovascular Medicine

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Background: Magnetocardiography (MCG) is sensitive to minute cardiac electric abnormalities, but its clinical utility in diagnosing ischemic heart disease (IHD) has not been established. The present study examined the usefulness of an integral MCG value of ventricular repolarization in patients with IHD. Methods and Results: MCG was performed at rest in 14 patients with coronary stenosis >75% confirmed by coronary angiography (IHD group) using a 64-channel system, and then the sum of the 64-channel integral values of the QRS or JT intervals (QRSi and JTi, respectively) was calculated. The JTi/QRSi value indicated the total power of currents in JT compared with those in QRS. These measurements were repeated within 2 weeks after coronary revascularization. The Control group comprised 30 healthy volunteers. The baseline value of JTi/QRSi was significantly smaller in the IHD than in the Control group, but after revascularization it increased and did not significantly differ from the Control group. No significant difference in ST deviation was identified by electrocardiography (ECG) before and after coronary revascularization. Analysis of the Control group revealed that JTi/QRSi was not affected by age. Conclusions: The JTi/QRSi of the MCG is more sensitive to coronary stenosis than ECG, and this parameter improves soon after coronary revascularization.

Original language	English (US)
Pages (from-to)	1586-1592
Number of pages	7
Journal	Circulation Journal
Volume	71
Issue number	10
DOIs	https://doi.org/10.1253/circj.71.1586
State	Published - 2007

Keywords

Coronary artery disease
Diagnosis
Mapping
Revascularization

ASJC Scopus subject areas

Cardiology and Cardiovascular Medicine

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10.1253/circj.71.1586

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On, K., Watanabe, S., Yamada, S., Takeyasu, N., Nakagawa, Y., Nishina, H., Morimoto, T., Aihara, H., Kimura, T., Sato, Y., Tsukada, K., Kandori, A., Miyashita, T., Ogata, K., Suzuki, D., Yamaguchi, I., & Aonuma, K. (2007). Integral value of JT interval in magnetocardiography is sensitive to coronary stenosis and improves soon after coronary revascularization. Circulation Journal, 71(10), 1586-1592. https://doi.org/10.1253/circj.71.1586

On, K, Watanabe, S, Yamada, S, Takeyasu, N, Nakagawa, Y, Nishina, H, Morimoto, T, Aihara, H, Kimura, T, Sato, Y, Tsukada, K, Kandori, A, Miyashita, T, Ogata, K, Suzuki, D, Yamaguchi, I & Aonuma, K 2007, 'Integral value of JT interval in magnetocardiography is sensitive to coronary stenosis and improves soon after coronary revascularization', Circulation Journal, vol. 71, no. 10, pp. 1586-1592. https://doi.org/10.1253/circj.71.1586

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title = "Integral value of JT interval in magnetocardiography is sensitive to coronary stenosis and improves soon after coronary revascularization",

abstract = "Background: Magnetocardiography (MCG) is sensitive to minute cardiac electric abnormalities, but its clinical utility in diagnosing ischemic heart disease (IHD) has not been established. The present study examined the usefulness of an integral MCG value of ventricular repolarization in patients with IHD. Methods and Results: MCG was performed at rest in 14 patients with coronary stenosis >75% confirmed by coronary angiography (IHD group) using a 64-channel system, and then the sum of the 64-channel integral values of the QRS or JT intervals (QRSi and JTi, respectively) was calculated. The JTi/QRSi value indicated the total power of currents in JT compared with those in QRS. These measurements were repeated within 2 weeks after coronary revascularization. The Control group comprised 30 healthy volunteers. The baseline value of JTi/QRSi was significantly smaller in the IHD than in the Control group, but after revascularization it increased and did not significantly differ from the Control group. No significant difference in ST deviation was identified by electrocardiography (ECG) before and after coronary revascularization. Analysis of the Control group revealed that JTi/QRSi was not affected by age. Conclusions: The JTi/QRSi of the MCG is more sensitive to coronary stenosis than ECG, and this parameter improves soon after coronary revascularization.",

keywords = "Coronary artery disease, Diagnosis, Mapping, Revascularization",

author = "Kei On and Shigeyuki Watanabe and Satsuki Yamada and Noriyuki Takeyasu and Yoshitsugu Nakagawa and Hidetaka Nishina and Takafumi Morimoto and Hideaki Aihara and Taizo Kimura and Yoko Sato and Keiji Tsukada and Akihiko Kandori and Tsuyoshi Miyashita and Kuniomi Ogata and Daisuke Suzuki and Iwao Yamaguchi and Kazutaka Aonuma",

year = "2007",

doi = "10.1253/circj.71.1586",

language = "English (US)",

volume = "71",

pages = "1586--1592",

journal = "Circulation Journal",

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TY - JOUR

T1 - Integral value of JT interval in magnetocardiography is sensitive to coronary stenosis and improves soon after coronary revascularization

AU - On, Kei

AU - Watanabe, Shigeyuki

AU - Yamada, Satsuki

AU - Takeyasu, Noriyuki

AU - Nakagawa, Yoshitsugu

AU - Nishina, Hidetaka

AU - Morimoto, Takafumi

AU - Aihara, Hideaki

AU - Kimura, Taizo

AU - Sato, Yoko

AU - Tsukada, Keiji

AU - Kandori, Akihiko

AU - Miyashita, Tsuyoshi

AU - Ogata, Kuniomi

AU - Suzuki, Daisuke

AU - Yamaguchi, Iwao

AU - Aonuma, Kazutaka

PY - 2007

Y1 - 2007

N2 - Background: Magnetocardiography (MCG) is sensitive to minute cardiac electric abnormalities, but its clinical utility in diagnosing ischemic heart disease (IHD) has not been established. The present study examined the usefulness of an integral MCG value of ventricular repolarization in patients with IHD. Methods and Results: MCG was performed at rest in 14 patients with coronary stenosis >75% confirmed by coronary angiography (IHD group) using a 64-channel system, and then the sum of the 64-channel integral values of the QRS or JT intervals (QRSi and JTi, respectively) was calculated. The JTi/QRSi value indicated the total power of currents in JT compared with those in QRS. These measurements were repeated within 2 weeks after coronary revascularization. The Control group comprised 30 healthy volunteers. The baseline value of JTi/QRSi was significantly smaller in the IHD than in the Control group, but after revascularization it increased and did not significantly differ from the Control group. No significant difference in ST deviation was identified by electrocardiography (ECG) before and after coronary revascularization. Analysis of the Control group revealed that JTi/QRSi was not affected by age. Conclusions: The JTi/QRSi of the MCG is more sensitive to coronary stenosis than ECG, and this parameter improves soon after coronary revascularization.

AB - Background: Magnetocardiography (MCG) is sensitive to minute cardiac electric abnormalities, but its clinical utility in diagnosing ischemic heart disease (IHD) has not been established. The present study examined the usefulness of an integral MCG value of ventricular repolarization in patients with IHD. Methods and Results: MCG was performed at rest in 14 patients with coronary stenosis >75% confirmed by coronary angiography (IHD group) using a 64-channel system, and then the sum of the 64-channel integral values of the QRS or JT intervals (QRSi and JTi, respectively) was calculated. The JTi/QRSi value indicated the total power of currents in JT compared with those in QRS. These measurements were repeated within 2 weeks after coronary revascularization. The Control group comprised 30 healthy volunteers. The baseline value of JTi/QRSi was significantly smaller in the IHD than in the Control group, but after revascularization it increased and did not significantly differ from the Control group. No significant difference in ST deviation was identified by electrocardiography (ECG) before and after coronary revascularization. Analysis of the Control group revealed that JTi/QRSi was not affected by age. Conclusions: The JTi/QRSi of the MCG is more sensitive to coronary stenosis than ECG, and this parameter improves soon after coronary revascularization.

KW - Coronary artery disease

KW - Diagnosis

KW - Mapping

KW - Revascularization

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DO - 10.1253/circj.71.1586

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AN - SCOPUS:34948906335

SN - 1346-9843

VL - 71

SP - 1586

EP - 1592

JO - Circulation Journal

JF - Circulation Journal

IS - 10

ER -

Integral value of JT interval in magnetocardiography is sensitive to coronary stenosis and improves soon after coronary revascularization

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