Benign paroxysmal positional vertigo of the horizontal canal: A form of canalolithiasis with variable clinical features
Benign paroxysmal positional vertigo of the horizontal canal: A form of canalolithiasis with variable clinical features
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DOI：
10.1016/0957-4271(95)02040-3
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发表时间：
1996-05-01
影响因子：
2.3
通讯作者：
Pagnini, P
中科院分区：
文献类型：
--
作者：
Nuti, D;Vannucchi, P;Pagnini, P
良性阵发性水平半规管位置性眩晕是一种以方向改变性水平位置性眼球震颤为特征的明确的综合征。我们报告了5例患者的临床特征，这些患者说明了该综合征的可能变量。在大多数情况下，眼球震颤是向地性的，当病变耳位于最低处时更强烈;很少出现远地性眼球震颤，当患病耳位于最高处时更强烈。同一患者的眼球震颤模式可能随时间变化，即使在短时间内观察也会从远地性变为向地性。在某些患者中，这些特征表明涉及一个以上的运河，无论是同时或连续的，它是持续的，临床表现可以解释为内淋巴的运动引起的耳石在半规管的位移和变异是由于不同的位置耳石在运河。
Benign paroxysmal positional vertigo of the horizontal semicircular canal (HC-BPPV) is a well-defined syndrome characterized by direction-changing horizontal positional nystagmus. We report the clinical features of 5 patients who illustrate the possible variables of the syndrome. In most cases, nystagmus is geotropic and more intense when the pathological ear is lowermost; less often the syndrome presents with apogeotropic nystagmus that is more intense when the affected ear is uppermost, The nystagmus pattern may vary in time in the same patient, changing from apogeotropic to geotropic even in observations at short intervals. In some patients, the features indicate involvement of more than one canal, either simultaneously or in succession, It is sustained that the clinical findings can be explained by movement of endolymph caused by displacement of otoconia in the semicircular canals and that variants are due to different positions of the otoconia within the canals.