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Electrophysiological study for the diagnosis and prognosis of syncope of unknown origin


, : Electrophysiological study for the diagnosis and prognosis of syncope of unknown origin. Presse Medicale 24(8): 387-392

To evaluate, on the basis of long-term outcome, the value of electrophysiologic exploration for determining the cause of syncope of unknown origin after clinical examination and standard laboratory tests. In 1985 and 1986, 109 consecutive patients with syncope of unknown origin underwent electrophysiologic exploration. The patients were divided into two groups. Baseline electrocardiogram was abnormal in 59 patients: cardiopathy (32%), ischemia (17%). In 44 of these patients, electrophysiologic exploration revealed major abnormalities requiring treatment (Group 1). No aetiology could be defined in 65 patients (Group 2). Patients were followed for 37 +/- 11 months. Three were lost to follow-up and 106 were retained for analysis. Morbidity and mortality were 25% and 16% respectively at the end of follow-up. Two sudden deaths were recorded, both in Group 1. Total mortality was greater in Group 1 (10 vs 6) so electrophysiologic exploration had defined a population at lower risk of sudden death and overall mortality. Relapse of syncope was observed in 27 patients (25% and 26% in Groups 1 and 2 respectively) due to rhythm disorders in 8, vasodepression in 1 and unknown origin in 18. The rate of recurrent syncope suggests these patients should have a second work-up in order to diagnose initially false negatives. Relapse raises the problem of electrophysiologic abnormalities and multifactorial mechanisms causing syncope of unknown origin.

US$29.90

PMID: 7899417


Other references

Anonymous, 1990: European Scientific User Conference SOMATOM Plus. 2-3 March 1990, Zurich. Der Radiologe 30(5 Europ Sci ): 1-16

Gao, B.; Jia, Y.; Zhang, Y.; Li, Q.; Yue, Q., 2011: Performance of dithiocarbamate-type flocculant in treating simulated polymer flooding produced water. Produced water from polymer flooding is difficult to treat due to its high polymer concentration, high viscosity, and emulsified characteristics. The dithiocarbamate flocculant, DTC (T403), was prepared by the amine-terminated polyoxypropane-ether...

Olsho, L.; Harkins, S.; Lenhardt, M., 1985: Aging and the auditory system. Handbook of the psychology of aging editors James E Birren K Warner Schaie with the assistance of asssociate editors Vern Bengtson Lissy Jarvik Timothy Salthouse: 377

Tzelepis, F.; Paul, C.L.; Wiggers, J.; Kypri, K.; Bonevski, B.; McElduff, P.; Hill, M.Ann.; Morgan, P.J.; Lynagh, M.; Collins, C.E.; Campbell, E.; Courtney, R.J.; Chapman, K.; Wolfenden, L.; Guillaumier, A.; Searles, A., 2015: Targeting multiple health risk behaviours among vocational education students using electronic feedback and online and telephone support: protocol for a cluster randomised trial. Technical and Further Education (TAFE) colleges are the primary provider of vocational education in Australia. Most TAFE students are young adults, a period when health risk behaviours become established. Furthermore, high rates of smoking, risky...

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Keldermann, H., 1954: Pathological changes of stumps in patients wearing thigh prostheses with different methods of attachment. Die Medizinische 38: 1276-1277

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Rosenlöf, K.; Kivivuori, S.M.; Grönhagen-Riska, C.; Teppo, A.M.; Slimes, M.A., 1995: Iron availability is transiently improved by intravenous iron medication in patients on chronic hemodialysis. Iron deficiency is common in hemodialysis patients, particularly if they are on recombinant human erythropoietin (rHuEPO) therapy. Ten anemic patients (hemoglobin concentration 89 +- 2.2 g/l, mean +- SEM) on hemodialysis with either storage (serum...

Pauker, N.E.; Folstein, M.F.; Moran, T.H., 1978: The clinical utility of the hand-held tachistoscope. A hand-held tachistoscope for use at the bedside was constructed and used to examine 40 normal controls and 170 psychiatric and neurological patients. This instrument quickly provided an index (perception time) which distinguished between idiopath...

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