HYPERVENTILATION SYNCOPE
\hˌa͡ɪpəvˌɛntɪlˈe͡ɪʃən sˈɪnkə͡ʊp], \hˌaɪpəvˌɛntɪlˈeɪʃən sˈɪnkəʊp], \h_ˌaɪ_p_ə_v_ˌɛ_n_t_ɪ_l_ˈeɪ_ʃ_ə_n s_ˈɪ_n_k_əʊ_p]\
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A transient loss of consciousness and postural tone caused by diminished blood flow to the brain (i.e., BRAIN ISCHEMIA). Presyncope refers to the sensation of lightheadedness and loss of strength that precedes a syncopal event or accompanies an incomplete syncope. (From Adams et al., Principles of Neurology, 6th ed, pp367-9)
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