不明原因晕厥的时间节律

Research progress of the time rhythm of unexplained syncope

不明原因晕厥（UPS）是临床上常见的疾病,可发生在各个年龄阶段.但UPS的确切发病机制尚不清楚.国内外很多研究报道,心血管系统的功能具有昼夜节律,可用自主神经、动态血压、心率变异性等来反映.心脑血管恶性事件多发生在早晨,为了更好地防治UPS,研究其时间节律具有重要意义.

Unexplained syncope （UPS） is a common clinical disease.It may occur at all ages.But the pothogenisis of UPS is still unclear.There are many researches at home and abroad reporting that the cardiovascular system has endogenous circadian rhythm.And the circadian variations of autonomic nervous system,ambulatory blood pressure,and heart rate variability may contribute to the observed circadian rhythm of cardiovascular.Sudden cardiac and cerebral events are most common in the morning.The time rhythm of UPS may have potential implications for management.