QT intervals and QT dispersion determined from a 12-lead 24-hour Holter recording in patients with coronary artery disease and patients with heart failure.

S. Hansen; V. Rasmussen; C. Torp-Pedersen; Gorm Boje Jensen; Stig Henrik Strange Hansen; Verner Rasmussen; Christian Torp-Pedersen; Gorm Boje Jensen

doi:10.1111/j.1542-474X.2007.00197.x

QT intervals and QT dispersion determined from a 12-lead 24-hour Holter recording in patients with coronary artery disease and patients with heart failure.

S. Hansen, V. Rasmussen, C. Torp-Pedersen, Gorm Boje Jensen, Stig Henrik Strange Hansen, Verner Rasmussen, Christian Torp-Pedersen, Gorm Boje Jensen

13 Citations (Scopus)

Abstract

BACKGROUND: QT dispersion is considered an index of spatial inhomogeneity of repolarization duration and increased dispersion of ventricular repolarization is supposed to increase the risk of ventricular arrhythmia. Circadian variation in QT dispersion was investigated. METHODS: Three different modes of lead selection was used: all 12-leads (QTdisp 12), only precordial leads (QTdisp 6), and one pair of preselected leads (QTdisp 2) in a 24-hour Holter recording every fourth hour each comprising 10 consecutive measurements in 54 healthy subjects, 29 patients with coronary artery disease (CAD), and 29 patients with heart failure (HF). RESULTS: A significant circadian variation was observed in healthy subjects when modes QTdisp 12 and QTdisp 6 were used (Mean +/- SD 35.58 +/- 16.48 ms; P < 0.0001; and 28.82 +/- 16.02 ms; P < 0.0001, respectively), and in patients with CAD (Mean +/- SD 37.86 +/- 17.87 ms; P < 0.01; and 28.72 +/- 17.06 ms; P < 0.0001, respectively), whereas no circadian variation was observed in QTdisp 2. No circadian variation was observed in patients with HF irrespectively of lead selection. Patients with CAD without myocardial infarction (MI) had a circadian variation in QTdisp 12 (Mean +/- SD 33.13 +/- 14.86 ms; P < 0.05), whereas no circadian variation was observed in patients with MI (Mean +/- SD 40.35 +/- 18.80 ms; P = NS). CONCLUSIONS: Circadian variation of QT dispersion was detected in healthy subjects and in patients with uncomplicated CAD, but not in those who had suffered a previous MI and in patients with HF. The number of leads among which selection of the longest and shortest QT intervals took place was critical for the disclosure of circadian variation of QT dispersion.

Original language	English
Journal	Annals of Noninvasive Electrocardiology (Online)
Volume	13
Issue number	1
Pages (from-to)	22-30
Number of pages	8
ISSN	1542-474X
DOIs	https://doi.org/10.1111/j.1542-474X.2007.00197.x https://doi.org/10.1111/j.1542-474X.2007.00197.x
Publication status	Published - 2008

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Hansen, S., Rasmussen, V., Torp-Pedersen, C., Jensen, G. B., Hansen, S. H. S., Rasmussen, V., Torp-Pedersen, C., & Jensen, G. B. (2008). QT intervals and QT dispersion determined from a 12-lead 24-hour Holter recording in patients with coronary artery disease and patients with heart failure. Annals of Noninvasive Electrocardiology (Online), 13(1), 22-30. https://doi.org/10.1111/j.1542-474X.2007.00197.x, https://doi.org/10.1111/j.1542-474X.2007.00197.x

QT intervals and QT dispersion determined from a 12-lead 24-hour Holter recording in patients with coronary artery disease and patients with heart failure. / Hansen, S.; Rasmussen, V.; Torp-Pedersen, C. et al.

In: Annals of Noninvasive Electrocardiology (Online), Vol. 13, No. 1, 2008, p. 22-30.

Research output: Contribution to journal › Journal article › Research › peer-review

Hansen, S, Rasmussen, V, Torp-Pedersen, C, Jensen, GB, Hansen, SHS, Rasmussen, V, Torp-Pedersen, C & Jensen, GB 2008, 'QT intervals and QT dispersion determined from a 12-lead 24-hour Holter recording in patients with coronary artery disease and patients with heart failure.', Annals of Noninvasive Electrocardiology (Online), vol. 13, no. 1, pp. 22-30. https://doi.org/10.1111/j.1542-474X.2007.00197.x, https://doi.org/10.1111/j.1542-474X.2007.00197.x

Hansen S, Rasmussen V, Torp-Pedersen C, Jensen GB, Hansen SHS, Rasmussen V et al. QT intervals and QT dispersion determined from a 12-lead 24-hour Holter recording in patients with coronary artery disease and patients with heart failure. Annals of Noninvasive Electrocardiology (Online). 2008;13(1):22-30. doi: 10.1111/j.1542-474X.2007.00197.x, http://dx.doi.org/10.1111/j.1542-474X.2007.00197.x

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title = "QT intervals and QT dispersion determined from a 12-lead 24-hour Holter recording in patients with coronary artery disease and patients with heart failure.",

abstract = "BACKGROUND: QT dispersion is considered an index of spatial inhomogeneity of repolarization duration and increased dispersion of ventricular repolarization is supposed to increase the risk of ventricular arrhythmia. Circadian variation in QT dispersion was investigated. METHODS: Three different modes of lead selection was used: all 12-leads (QTdisp 12), only precordial leads (QTdisp 6), and one pair of preselected leads (QTdisp 2) in a 24-hour Holter recording every fourth hour each comprising 10 consecutive measurements in 54 healthy subjects, 29 patients with coronary artery disease (CAD), and 29 patients with heart failure (HF). RESULTS: A significant circadian variation was observed in healthy subjects when modes QTdisp 12 and QTdisp 6 were used (Mean +/- SD 35.58 +/- 16.48 ms; P < 0.0001; and 28.82 +/- 16.02 ms; P < 0.0001, respectively), and in patients with CAD (Mean +/- SD 37.86 +/- 17.87 ms; P < 0.01; and 28.72 +/- 17.06 ms; P < 0.0001, respectively), whereas no circadian variation was observed in QTdisp 2. No circadian variation was observed in patients with HF irrespectively of lead selection. Patients with CAD without myocardial infarction (MI) had a circadian variation in QTdisp 12 (Mean +/- SD 33.13 +/- 14.86 ms; P < 0.05), whereas no circadian variation was observed in patients with MI (Mean +/- SD 40.35 +/- 18.80 ms; P = NS). CONCLUSIONS: Circadian variation of QT dispersion was detected in healthy subjects and in patients with uncomplicated CAD, but not in those who had suffered a previous MI and in patients with HF. The number of leads among which selection of the longest and shortest QT intervals took place was critical for the disclosure of circadian variation of QT dispersion.",

author = "S. Hansen and V. Rasmussen and C. Torp-Pedersen and Jensen, {Gorm Boje} and Hansen, {Stig Henrik Strange} and Verner Rasmussen and Christian Torp-Pedersen and Jensen, {Gorm Boje}",

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doi = "10.1111/j.1542-474X.2007.00197.x",

language = "English",

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T1 - QT intervals and QT dispersion determined from a 12-lead 24-hour Holter recording in patients with coronary artery disease and patients with heart failure.

AU - Hansen, S.

AU - Rasmussen, V.

AU - Torp-Pedersen, C.

AU - Jensen, Gorm Boje

AU - Hansen, Stig Henrik Strange

AU - Rasmussen, Verner

AU - Torp-Pedersen, Christian

AU - Jensen, Gorm Boje

PY - 2008

Y1 - 2008

N2 - BACKGROUND: QT dispersion is considered an index of spatial inhomogeneity of repolarization duration and increased dispersion of ventricular repolarization is supposed to increase the risk of ventricular arrhythmia. Circadian variation in QT dispersion was investigated. METHODS: Three different modes of lead selection was used: all 12-leads (QTdisp 12), only precordial leads (QTdisp 6), and one pair of preselected leads (QTdisp 2) in a 24-hour Holter recording every fourth hour each comprising 10 consecutive measurements in 54 healthy subjects, 29 patients with coronary artery disease (CAD), and 29 patients with heart failure (HF). RESULTS: A significant circadian variation was observed in healthy subjects when modes QTdisp 12 and QTdisp 6 were used (Mean +/- SD 35.58 +/- 16.48 ms; P < 0.0001; and 28.82 +/- 16.02 ms; P < 0.0001, respectively), and in patients with CAD (Mean +/- SD 37.86 +/- 17.87 ms; P < 0.01; and 28.72 +/- 17.06 ms; P < 0.0001, respectively), whereas no circadian variation was observed in QTdisp 2. No circadian variation was observed in patients with HF irrespectively of lead selection. Patients with CAD without myocardial infarction (MI) had a circadian variation in QTdisp 12 (Mean +/- SD 33.13 +/- 14.86 ms; P < 0.05), whereas no circadian variation was observed in patients with MI (Mean +/- SD 40.35 +/- 18.80 ms; P = NS). CONCLUSIONS: Circadian variation of QT dispersion was detected in healthy subjects and in patients with uncomplicated CAD, but not in those who had suffered a previous MI and in patients with HF. The number of leads among which selection of the longest and shortest QT intervals took place was critical for the disclosure of circadian variation of QT dispersion.

AB - BACKGROUND: QT dispersion is considered an index of spatial inhomogeneity of repolarization duration and increased dispersion of ventricular repolarization is supposed to increase the risk of ventricular arrhythmia. Circadian variation in QT dispersion was investigated. METHODS: Three different modes of lead selection was used: all 12-leads (QTdisp 12), only precordial leads (QTdisp 6), and one pair of preselected leads (QTdisp 2) in a 24-hour Holter recording every fourth hour each comprising 10 consecutive measurements in 54 healthy subjects, 29 patients with coronary artery disease (CAD), and 29 patients with heart failure (HF). RESULTS: A significant circadian variation was observed in healthy subjects when modes QTdisp 12 and QTdisp 6 were used (Mean +/- SD 35.58 +/- 16.48 ms; P < 0.0001; and 28.82 +/- 16.02 ms; P < 0.0001, respectively), and in patients with CAD (Mean +/- SD 37.86 +/- 17.87 ms; P < 0.01; and 28.72 +/- 17.06 ms; P < 0.0001, respectively), whereas no circadian variation was observed in QTdisp 2. No circadian variation was observed in patients with HF irrespectively of lead selection. Patients with CAD without myocardial infarction (MI) had a circadian variation in QTdisp 12 (Mean +/- SD 33.13 +/- 14.86 ms; P < 0.05), whereas no circadian variation was observed in patients with MI (Mean +/- SD 40.35 +/- 18.80 ms; P = NS). CONCLUSIONS: Circadian variation of QT dispersion was detected in healthy subjects and in patients with uncomplicated CAD, but not in those who had suffered a previous MI and in patients with HF. The number of leads among which selection of the longest and shortest QT intervals took place was critical for the disclosure of circadian variation of QT dispersion.

U2 - 10.1111/j.1542-474X.2007.00197.x

DO - 10.1111/j.1542-474X.2007.00197.x

M3 - Journal article

C2 - 18234003

SN - 1082-720X

VL - 13

SP - 22

EP - 30

JO - Annals of Noninvasive Electrocardiology

JF - Annals of Noninvasive Electrocardiology

IS - 1

ER -

QT intervals and QT dispersion determined from a 12-lead 24-hour Holter recording in patients with coronary artery disease and patients with heart failure.

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