Impairment of heart rate variability during paclitaxel therapy.
Cancer
; 88(9): 2149-53, 2000 May 01.
Article
en En
| MEDLINE
| ID: mdl-10813728
BACKGROUND: Paclitaxel, which has been reported to be effective in treating metastatic breast carcinoma and advanced ovarian carcinoma, has been associated with cardiac side effects. Therefore, the effect of paclitaxel on cardiovascular autonomic regulation was studied. METHODS: Twenty-four-hour ambulatory electrocardiogram measurements were recorded twice from 14 women with breast or ovarian carcinoma: once before paclitaxel treatment and once on the day after the second chemotherapy course. Heart rate variability (HRV) was assessed with spectral analysis. For the frequency domain analysis, HRV was assessed in the very low (0.005-0.040 hertz [Hz]), low (0.040-0.150 Hz), and high frequency (0.150-0.400 Hz) spectral components. RESULTS: The ratio between low frequency and high frequency HRV decreased (daytime values of 2.7% [standard deviation (SD) 1.6] vs. 1.7% [SD 0.91; P = 0.0098) after 2 courses of paclitaxel. The circadian fluctuation of HRV also decreased in all studied frequency components. CONCLUSIONS: The observed changes in spectral characteristics suggest that autonomic modulation of the heart rate is impaired after paclitaxel therapy. However, from these data it is not clear whether the observed changes are permanent or whether autonomic cardiac function returns to normal some time after treatment. Further studies are needed to examine whether these indices based on HRV can be used to detect those patients at risk for cardiac side effects during chemotherapy.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Sistema Nervioso Autónomo
/
Paclitaxel
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Sistema de Conducción Cardíaco
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Frecuencia Cardíaca
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Antineoplásicos Fitogénicos
Tipo de estudio:
Etiology_studies
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Observational_studies
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Prognostic_studies
/
Risk_factors_studies
Límite:
Adult
/
Aged
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Female
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Humans
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Middle aged
Idioma:
En
Revista:
Cancer
Año:
2000
Tipo del documento:
Article
País de afiliación:
Finlandia
Pais de publicación:
Estados Unidos