Epidemiology of reflex syncope

Colman, Nancy; Nahm, K.; Ganzeboom, Karin S.; Shen, Win‐Kuang; Reitsma, Johannes B.; Linzer, Mark; Wieling, Wouter; Kaufmann, Horacio

doi:10.1007/s10286-004-1003-3

Cited by 235 publications

(194 citation statements)

References 45 publications

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“…Our results remain in line with those previously described in the literature [24,30,47]. In the analysis of signal complexity in a 250 beat window, ApEn is as effective as SampEn and both of the entropy measures lead to identical conclusions despite the values of ApEn being higher than the values of SampEn.…”

Section: Discussionsupporting

confidence: 92%

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Entropy in Investigation of Vasovagal Syndrome in Passive Head Up Tilt Test

Buszko

Piątkowska

Koźluk

et al. 2017

Entropy

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This paper presents an application of Approximate Entropy (ApEn) and Sample Entropy (SampEn) in the analysis of heart rhythm, blood pressure and stroke volume for the diagnosis of vasovagal syndrome. The analyzed biosignals were recorded during positive passive tilt tests-HUTT(+). Signal changes and their entropy were compared in three main phases of the test: supine position, tilt, and pre-syncope, with special focus on the latter, which was analyzed in a sliding window of each signal. In some cases, ApEn and SampEn were equally useful for the assessment of signal complexity (p < 0.05 in corresponding calculations). The complexity of the signals was found to decrease in the pre-syncope phase (SampEn (RRI): 1.20-0.34, SampEn (sBP): 1.29-0.57, SampEn (dBP): 1.19-0.48, SampEn (SV): 1.62-0.91). The pattern of the SampEn (SV) decrease differs from the pattern of the SampEn (sBP), SampEn (dBP) and SampEn (RRI) decrease. For all signals, the lowest entropy values in the pre-syncope phase were observed at the moment when loss of consciousness occurred.

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Section: Discussionsupporting

confidence: 92%

“…The unequal proportion in gender reflects the occurrence of syncope in the general population [47,48]. We are also aware that the hemodynamic parameters and their complexity are age-dependent [49,50].…”

Section: Limitationsmentioning

confidence: 99%

Entropy in Investigation of Vasovagal Syndrome in Passive Head Up Tilt Test

Buszko

Piątkowska

Koźluk

et al. 2017

Entropy

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“…Las lipotimias y síncopes afectan en mayor proporción a jóvenes y en especial a mujeres 5,6 para luego disminuir su frecuencia por sobre los 30 años 5 .…”

Section: Resultsunclassified

“…A toda edad y con ambos protocolos (excepto después de los 80 años) el predominio del sexo femenino es notorio 5,6 . Se postula que se debe a la mayor frecuencia de hiperlaxitud ligamentosa en las mujeres [10][11][12] , lo que las predispone a los sínco-pes.…”

Section: Edad Y Sexounclassified

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Prueba de basculación (Tilt Table Testing): Comparación de dos protocolos: isoproterenol versus nitroglicerina

et al. 2015

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Did This Patient Have Cardiac Syncope?

Albassam

Redelmeier

Shadowitz

et al. 2019

JAMA

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IMPORTANCE Syncope can result from a reduction in cardiac output from serious cardiac conditions, such as arrhythmias or structural heart disease (cardiac syncope), or other causes, such as vasovagal syncope or orthostatic hypotension.OBJECTIVE To perform a systematic review of studies of the accuracy of the clinical examination for identifying patients with cardiac syncope.STUDY SELECTION Studies of adults presenting to primary care, emergency departments, or referred to specialty clinics.DATA EXTRACTION AND SYNTHESIS Relevant data were abstracted from articles in databases through April 9, 2019, and methodologic quality was assessed. Included studies had an independent comparison to a reference standard. Sensitivity, specificity, and likelihood ratios (LRs). MAIN OUTCOMES AND MEASURESRESULTS Eleven studies of cardiac syncope (N = 4317) were included. Age at first syncope of at least 35 years was associated with greater likelihood of cardiac syncope (n = 323

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Epidemiology of reflex syncope

Cited by 235 publications

References 45 publications

Entropy in Investigation of Vasovagal Syndrome in Passive Head Up Tilt Test

Entropy in Investigation of Vasovagal Syndrome in Passive Head Up Tilt Test

Prueba de basculación (Tilt Table Testing): Comparación de dos protocolos: isoproterenol versus nitroglicerina

Did This Patient Have Cardiac Syncope?

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