Tilt testing results are influenced by tilt protocol.
Europace
; 18(7): 1108-12, 2016 Jul.
Article
en En
| MEDLINE
| ID: mdl-26443446
ABSTRACT
AIMS:
It is unknown how the return to supine position influences duration of loss of consciousness (LOC) and cardioinhibition during tilt test. METHODS ANDRESULTS:
Retrospective analysis of two datasets containing records of patients who underwent tilt testing for unexplained syncope in two centres was performed. Patients, totalling 1232, were included in the study 262 in a Swedish centre and 970 patients in a Polish centre. In Sweden, tilt table with tilt-down time (TDT) of 18 s was used (Group II). In Poland, two different tilt tables were used, one of them with TDT of 10 s (Group I, n = 325), and the other with TDT of 47 s (Group III, n = 645). Cardioinhibitory reflex occurred most frequently in Group III, whereas number of pauses >3 s, frequency of very long asystole ≥30 s, and the total duration of pauses >3 s demonstrated a trend to increase from Group I to III. Duration of LOC in Groups II and III was significantly longer compared with Group I (32.0 and 33.7 s vs. 16.4 s). In the multivariate-adjusted regression model, cardioinhibitory reflex was predicted by tilt-table model (odds ratio per model with increasing TDT 1.40; 95% confidence interval, 1.19-1.64; P < 0.0001), whereas LOC duration was longer with increasing TDT (P < 0.0001) and age (P < 0.0001).CONCLUSION:
Longer TDT during induced vasovagal syncope increases the prevalence of cardioinhibitory reflex and prolongs the duration of LOC. Tilt-down time does not affect asystolic pause duration but delay may lead to occurrence of multiple pauses, higher frequency of very long asystole, and longer total asystole duration.Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Inconsciencia
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Muerte Súbita Cardíaca
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Pruebas de Mesa Inclinada
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Síncope Vasovagal
Tipo de estudio:
Etiology_studies
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Observational_studies
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Prognostic_studies
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Risk_factors_studies
Límite:
Adult
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Aged
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Female
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Humans
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Male
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Middle aged
País/Región como asunto:
Europa
Idioma:
En
Año:
2016
Tipo del documento:
Article