Circadian Modulation of Ventricular Tachycardia Cycle Length Variability in ICD Patients with Dilated Cardiomyopathy.
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| Title: | Circadian Modulation of Ventricular Tachycardia Cycle Length Variability in ICD Patients with Dilated Cardiomyopathy. |
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| Authors: | Manolis, Athanasios G.1, Katsivas, Apostolos1, Lazaris, Eustathios1, Koutsogeogis, Dimitrios1, Louvros, Nikolaos1 |
| Source: | Pacing & Clinical Electrophysiology. Jan1997, Vol. 20 Issue 1, p203-207. 5p. |
| Subjects: | Tachycardia, Cardiomyopathies, Cardiac patients, Circadian rhythms, Biological rhythms, Heart diseases |
| Abstract: | VT is usually characterized hy stability of the HR intervals after a few cycles from the onset. The aim of this study was to evaluate the VT cycle length (VTCL) variability in patients with dilated cardiomyopathy (DCM), in whom a third-generation ICD was previously implanted. Eighty-three episodes of VT were analyzed in 70 patients (8 male, 2 female, 65 ± 6 years) with DCM, and NYHA Class II (7 patients) or III (3 patients). As an index of VTCL variability, the coefficient of variance of the last 15 consecutive RR intervals (CVRR) of the detected and stored VT by the device was considered. The mean value of the HR intervals and the mean value of CVHR of the VT episodes recorded during day versus night time were compared. Fifty-five VT episodes were recorded during the day and 28 episodes during the night time. The mean HH intervals of VT episodes during day time was 335 ± 29 ms and during the night time was 350 ±22 ms (P = NS). The mean CVHH of VT episodes during day time and night time were 2.83 ± 0.52 and 3.36 ± 0.48, respectively (P = 0.017). In conclusion, a circadian modulation of VTCL variability exists in patients with DCM. The VTCL variability is less during day time compared to night time. A possible explanation is a circadian alteration of sympathovagal balance modifying the electrophysiological properties of the arrhythmogenic substrate. [ABSTRACT FROM AUTHOR] |
| Copyright of Pacing & Clinical Electrophysiology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 17424080 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Circadian Modulation of Ventricular Tachycardia Cycle Length Variability in ICD Patients with Dilated Cardiomyopathy. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Manolis%2C+Athanasios+G%2E%22">Manolis, Athanasios G.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Katsivas%2C+Apostolos%22">Katsivas, Apostolos</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Lazaris%2C+Eustathios%22">Lazaris, Eustathios</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Koutsogeogis%2C+Dimitrios%22">Koutsogeogis, Dimitrios</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Louvros%2C+Nikolaos%22">Louvros, Nikolaos</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Pacing+%26+Clinical+Electrophysiology%22">Pacing & Clinical Electrophysiology</searchLink>. Jan1997, Vol. 20 Issue 1, p203-207. 5p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Tachycardia%22">Tachycardia</searchLink><br /><searchLink fieldCode="DE" term="%22Cardiomyopathies%22">Cardiomyopathies</searchLink><br /><searchLink fieldCode="DE" term="%22Cardiac+patients%22">Cardiac patients</searchLink><br /><searchLink fieldCode="DE" term="%22Circadian+rhythms%22">Circadian rhythms</searchLink><br /><searchLink fieldCode="DE" term="%22Biological+rhythms%22">Biological rhythms</searchLink><br /><searchLink fieldCode="DE" term="%22Heart+diseases%22">Heart diseases</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: VT is usually characterized hy stability of the HR intervals after a few cycles from the onset. The aim of this study was to evaluate the VT cycle length (VTCL) variability in patients with dilated cardiomyopathy (DCM), in whom a third-generation ICD was previously implanted. Eighty-three episodes of VT were analyzed in 70 patients (8 male, 2 female, 65 ± 6 years) with DCM, and NYHA Class II (7 patients) or III (3 patients). As an index of VTCL variability, the coefficient of variance of the last 15 consecutive RR intervals (CVRR) of the detected and stored VT by the device was considered. The mean value of the HR intervals and the mean value of CVHR of the VT episodes recorded during day versus night time were compared. Fifty-five VT episodes were recorded during the day and 28 episodes during the night time. The mean HH intervals of VT episodes during day time was 335 ± 29 ms and during the night time was 350 ±22 ms (P = NS). The mean CVHH of VT episodes during day time and night time were 2.83 ± 0.52 and 3.36 ± 0.48, respectively (P = 0.017). In conclusion, a circadian modulation of VTCL variability exists in patients with DCM. The VTCL variability is less during day time compared to night time. A possible explanation is a circadian alteration of sympathovagal balance modifying the electrophysiological properties of the arrhythmogenic substrate. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Pacing & Clinical Electrophysiology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1111/j.1540-8159.1997.tb04843.x Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 5 StartPage: 203 Subjects: – SubjectFull: Tachycardia Type: general – SubjectFull: Cardiomyopathies Type: general – SubjectFull: Cardiac patients Type: general – SubjectFull: Circadian rhythms Type: general – SubjectFull: Biological rhythms Type: general – SubjectFull: Heart diseases Type: general Titles: – TitleFull: Circadian Modulation of Ventricular Tachycardia Cycle Length Variability in ICD Patients with Dilated Cardiomyopathy. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Manolis, Athanasios G. – PersonEntity: Name: NameFull: Katsivas, Apostolos – PersonEntity: Name: NameFull: Lazaris, Eustathios – PersonEntity: Name: NameFull: Koutsogeogis, Dimitrios – PersonEntity: Name: NameFull: Louvros, Nikolaos IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 01 Text: Jan1997 Type: published Y: 1997 Identifiers: – Type: issn-print Value: 01478389 Numbering: – Type: volume Value: 20 – Type: issue Value: 1 Titles: – TitleFull: Pacing & Clinical Electrophysiology Type: main |
| ResultId | 1 |
