A. What are the symptoms or circumstances related to the syncope? 1. Dizziness preceding syncope is highly associated with a psychological cause (24%) versus syncope without preceding dizziness (5%).

晕厥相关症状或情况1。与无头晕性晕厥相比，头晕后晕厥与精神性诱因关联很大，前者占5%，后者则占24%。

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The patients had no special clinical symptoms but were with hyponatremia-associated clinical symptoms of lassitude, asthenia, anorexia, nausea, apathy and dizziness.

患者无特殊临床症状，低钠血症的相关临床症状主要为倦怠、乏力、纳差、恶心、淡漠和头昏。

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Approximately 2 months earlier, while walking to work, the patient had the sudden onset of dizziness and the sensation of falling to the left, associated with diaphoresis and palpitations.

大约2个月前，当步行上班时，该病人突然出现头晕并感觉要向左侧跌倒，同时伴有出汗和心悸。

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Dizziness is the most common side effect associated with memantine.

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