Postural tension disappears

In severe symptomatic hypotension, there may be a sudden, transient loss of consciousness with the disappearance of postural tension, that is, the occurrence of syncope. Syncope refers to a transient loss of consciousness caused by a sudden, transient and widespread insufficiency of the brain. Mostly caused by physical factors, but also secondary to blood circulation disorders in the brain. Its clinical features are acute onset and transient loss of consciousness. Patients often have prodromal symptoms about one minute before the onset of syncope, manifested as general discomfort, blurred vision, tinnitus, nausea, pale complexion, cold sweats, and weakness in the extremities, followed by syncope quickly. During syncope, loss of voluntary movement and sensation, sometimes apnea, slowed heart rate, and even cardiac arrest, it is difficult to touch the radial and carotid pulses. Examination of the nervous system reveals that the pupils are dilated, the light and corneal reflections disappear, the tendon reflexes are reduced or disappeared, and pathological reflexes can occur, often accompanied by salivation and urinary incontinence. It usually lasts 2-3 minutes, and then all functions gradually recover. After waking up, the patient may have cloudy consciousness for a short time, abdominal discomfort, nausea, vomiting, constipation, or even incontinence, extreme fatigue, drowsiness, lasting several minutes to half an hour, and there may be no positive signs after examination.