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Cervical shock. Bradycardia and hypotension resulting from cervical stimulation or instrumentation is referred to as "cervical shock". It may result from the presence of products of conception in the cervix during miscarriage, which should be removed if present. More commonly, in primary care settings, cervical shock can occur during Vasovagal syncope is typically triggered by seeing blood, pain, emotional stress, or prolonged standing. [11] Situational syncope is often triggered by urination, swallowing, or coughing. [2] Carotid sinus syncope is due to pressure on the carotid sinus in the neck. [2] National Center for Biotechnology Information The vasovagal reaction consists of vasodilatation and bradycardia. During a prolonged standing period, the vasovagal reaction is triggered by a reduction of the central blood volume because of pooling in the lower body veins. In some instances, it is combined with other provocative factors. The muscle vasodilator system may become activated Paolo Alboni, Michele Brignole, Ettore C. degli Uberti, Is vasovagal syncope a disease?, EP Europace, Volume 9, Issue 2, February 2007, Pages 83-87, during haemorrhagic shock, the vasovagal reaction can be observed in subjects with no history of syncope; about 20% of astronauts, This PDF is available to Subscribers Only. 2.4 Vasovagal Reflex During Hemorrhagic Shock in Animals. The vasovagal reflex during hemorrhagic shock has been observed in mammals such as rats, rabbits, cats, dogs, and rhesus monkeys, as well as in humans [67-74]. It appears to be due to thoracic hypovolemia which triggers afferent stimuli from the cardiopulmonary system. AVasovagal episode(faint) is relatively common after the vaccination of adults and adolescents, but infants and children rarely faint. Anaphylaxisfollowing routine vaccination is very rare, but can be fatal. Sudden loss of consciousness in young children should be presumed to be anaphylaxis, Diagnosis. Diagnosing vasovagal syncope often begins with a physical examination. During the physical exam, your doctor will listen to your heart and take your blood pressure. He or she may also massage the main arteries in your neck to see if that causes you to feel faint. Your doctor may also recommend several tests to rule out other possible anaphylactic shock and convulsion . Sample consisted of 102 men , 147 women and 121 respondents did not report sex . Sincope vasovagal n % Anafilaxia 28 15.3 15 8.0 43 11.6 Angina Pectoris 20 10.9 8 4.3 28 7.6 AVC 1 0.5 0 0.0 1 0.3 Convulsão e epilepsia 1 0.5 1 0.5 2 0.5 The objective of this study was to give a systematic overview of the current evidence (01/1990-11/2019) surrounding the aetiology and management of syncope in dental practices by answering the above-mentioned focused research questions via an electronic and hand literature search. Alongside, the occurrence of syncope, the practitioner's Constitutionalpredisposition to vasovagalsyncope 285 ventricular escapeat 17 seconds anda nodal escape at 29 seconds. After 33secondsa spontaneous sinus impulsewas seen butanothersinus arrest followed. Electrical cardiac activity then was restored by a blowto the chest andexternal cardiac compression. During the next three days no arrhythmias or car- • Initial s