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1·Results Vertigo attack of PC-BPPV had such characters as brief period, positioning, latency and fatigability.

结果PC - BPPV患者眩晕发作具有短暂性、变位性、潜伏期和疲劳性等特点。

2·Symptoms of SSS include: syncope, dizziness, palpitations, exertions dyspnea, fatigability from chronotropic incompetence, heart failure, and angina.

病窦综合征的症状包括：晕厥，头昏，心悸，劳力性呼吸困难，变时性功能不全，心衰，和心绞痛导致的易疲劳。