晕厥的临床辨别诊断(国外英文资料).docVIP

晕厥的临床鉴别诊断 Clinical differential diagnosis of syncope Syncope: it is because of the present comprehensive brief loss of consciousness caused by insufficient supply, attack patients disappeared as muscle tension cant keep the normal position and fall on the ground. Usually sudden onset, rapid recovery, few sequelae. Causes and classification of syncope: Reflexive syncope: due to vasomotor obstruction. Vasovagal syncope (simple syncope) : Pathogenesis: due to various stimulation mediated via the vagus nerve reflex, vascular bed expansion and bradycardia, sudden expansion, peripheral vascular venous blood backflow heart, make the heart to speed up and strengthen the contraction of reflex action, some people will because of excessive stimulate the vagus nerve and parasympathetic nerve, resulting in a heartbeat suddenly slow, peripheral vascular expansion, resulting in lower blood pressure and oxygen to the brain, characterized by arterial hypotension accompanied by a brief loss of consciousness, can restore automatically, without nerve localization signs of a syndrome. Case characteristics: seizures often have obvious triggers (such as pain, emotional tension, fear, minor bleeding, various punctures and minor surgery). Whether can have a short dizziness, inattention, pale, visual, hearing loss, nausea, vomiting, sweating, unstable and so on premonitory symptoms, for several minutes and then all of a sudden loss of consciousness, often accompanied by drop in blood pressure, weak pulse, lasts for a few seconds or minutes after can awaken naturally, without sequelae. Identify key points: ask if there is a trigger for the onset of the disease, and whether there is an increase in vagal tone and an increased level of parasympathetic arousal. An upright low-blood pressure syncope Case characteristics: it manifests itself in a sudden change in position, mainly caused by the syncope that occurs when the position of the bench or the position of a squat position suddenly occurs. I