心悸(palpitation)是一个常见症状。患者自觉心跳或心慌，伴有心前区不适感，当心率缓慢常感到心脏搏动强烈，心率加快时可感到心脏跳动，甚至可感到心前区振动。
从病名、病因病机两方面对心悸病的源流进行考证。
From both the name and the etiology and pathogenesis of a disease the origin and development of the palpitation were explored.
背景长-QT综合征（LQTS）是一种潜在的致命性心脏的离子通道病，容易被误认为是心悸，神经心源性晕厥或者癫痫。
Background— Long-QT syndrome (LQTS) is a potentially lethal cardiac channelopathy that can be mistaken for palpitations, neurocardiogenic syncope, and epilepsy.
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。
Symptoms of SSS include: syncope, dizziness, palpitations, exertions dyspnea, fatigability from chronotropic incompetence, heart failure, and angina.
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