Navegando por Palavras-chave "Syncope"

Agora exibindo 1 - 4 de 4
  • Imagem de Miniatura
    Item
    Acesso aberto (Open Access)
    Anatomical and clinical aspects of the blood supply of the sinoatrial node
    (Associação Médica Brasileira, 1998-03-01) Lopes, Antonio Carlos [UNIFESP]; Didio, L.j.a.; Buffolo, Enio [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Universidade de Santo Amaro Faculdade de Medicina Surgical Anatomy
    BACKGROUND: The recent study of the variations of the origin of the sinoatrial node and on the arterial network of the perinodal sinusal area in normal hearts points out the importance of this network. PURPOSE: Report on a case of patient with syncope of ischemic etiology. CONCLUSION: In this patient the arterial network did not protect the node from the ischemia caused by the obstruction of the artery of the sinoatrial node.
  • Nenhuma Miniatura disponível
    Item
    Somente Metadadados
    Heart rate variability during sleep in patients with vasovagal syncope
    (Blackwell Publishing, 2005-12-01) Cintra, Fátima Dumas [UNIFESP]; Poyares, Dalva [UNIFESP]; Amaral, Alessandro do [UNIFESP]; Marchi, Guilherme de [UNIFESP]; Barreto, Simone [UNIFESP]; Tufik, Sergio [UNIFESP]; De Paola, Angelo Amato Vincenzo [UNIFESP]; Guilleminault, Christian; Universidade Federal de São Paulo (UNIFESP); Sleep Disorders Ctr
    Background: There are a few studies showing no significant heart rate variability (HRV) over a 24-hour period in vasovagal syncope (VVS) patients, but no research has examined HRV and its sympathetic and parasympathetic components during rapid eye movement (REM) and non-REM sleep. the authors hypothesized that REM sleep might be a critical state in which VVS patients would show abnormal responses.Objectives: To analyze the sympathetic and parasympathetic components of HRV during REM and SWS in patients with VVS compared to normal subjects, and in patients with positive HUTT compared to negative ones. Methods: Thirty-seven VVS patients and 20 normal age-matched controls were submitted to polysomnography with 24-hour Holter monitoring to assess HRV Time and frequency domain techniques were carefully performed for 24 hours and during Stages 3 and 4 of REM and non-REM sleep. Variation of sympathetic activity index (VSAI) was defined as the difference in the low frequency (LF) component of HRV between REM and Stages 3 and 4 of non-REM sleep. An analysis of variance was performed to compare patients and controls; patients with positive and negative head-up tilt testing.Results: the LF component was lower in syncope compared to normal patients (1,769.54 +/- 1,738.17, 3,225.37 +/- 2,585.05, respectively, P = 0.03). There was a significant decrease in VSAI in the syncope group compared to the control group (-539.39 +/- 1,930.78, 1,268.10 +/- 2,420.20, respectively, P = 0.01). the other sleep variables analyzed including very LF, high frequency, low frequency/high frequency and time domain parameters did not reach statistical significance. Syncope patients also showed an increase in slow wave sleep (28.2 +/- 10.5, 19.7 +/- 7.8, P = 0.01).Conclusions: VVS patients exhibited sympathetic suppression during REM sleep. Possible mechanisms are discussed in this article.
  • Nenhuma Miniatura disponível
    Item
    Somente Metadadados
    Syncope by psychogenic hyperventilation in a patient with Chagas' disease
    (Elsevier B.V., 2014-08-20) Veloso, Henrique Horta [UNIFESP]; Rezende, Andre Gustavo [UNIFESP]; Vincenzo de Paola, Angelo Amato [UNIFESP]; Hosp Rio; Universidade Federal de São Paulo (UNIFESP); Univ Pernambuco
  • Imagem de Miniatura
    Item
    Acesso aberto (Open Access)
    The use of external event monitoring (web-loop) in the elucidation of symptoms associated with arrhythmias in a general population
    (Instituto Israelita de Ensino e Pesquisa Albert Einstein, 2014-09-01) Epifanio, Hindalis Ballesteros; Katz, Marcelo; Borges, Melania Aparecida; Corrêa, Alessandra da Graça; Cintra, Fátima Dumas [UNIFESP]; Grinberg, Rodrigo Leandro; Ludovice, Ana Cristina Pinotti Pedro; Valdigem, Bruno Pereira; Silva, Nilton José Carneiro da; Fenelon, Guilherme; Hospital Israelita Albert Einstein; Universidade Federal de São Paulo (UNIFESP)
    ObjectiveTo correlate arrhythmic symptoms with the presence of significant arrhythmias through the external event monitoring (web-loop). MethodBetween January and December 2011, the web-loop was connected to 112 patients (46% of them were women, mean age 52±21 years old). Specific arrhythmic symptoms were defined as palpitations, pre-syncope and syncope observed during the monitoring. Supraventricular tachycardia, atrial flutter or fibrillation, ventricular tachycardia, pauses greater than 2 seconds or advanced atrioventricular block were classified as significant arrhythmia. The association between symptoms and significant arrhythmias were analyzed. ResultThe web-loop recorded arrhythmic symptoms in 74 (66%) patients. Of these, in only 14 (19%) patients the association between symptoms and significant cardiac arrhythmia was detected. Moreover, significant arrhythmia was found in 11 (9.8%) asymptomatic patients. There was no association between presence of major symptoms and significant cardiac arrhythmia (OR=0.57, CI95%: 0.21-1.57; p=0.23). ConclusionWe found no association between major symptoms and significant cardiac arrhythmia in patients submitted to event recorder monitoring. Event loop recorder was useful to elucidate cases of palpitations and syncope in symptomatic patients.