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Query: UMLS:C0036572 (seizures)
 80,221 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Vasovagal syncope precipitating an epileptic seizure has only rarely been described. A patient with known intractable complex partial seizures being evaluated for a left anterior temporal lobectomy experienced a typical seizure with mesial temporal onset precipitated by an observed vasovagal episode. This is the first report of a partial epileptic seizure precipitated by vasovagal syncope and the first example of an epileptic seizure induced by syncope in an adult. Video and intracranial depth electrode and subdural grid recordings documented the event.
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PMID:Complex partial seizure provocation by vasovagal syncope: video-EEG and intracranial electrode documentation. 902 93

On any given day a patient seen by the dental hygienist has the potential of experiencing a life-threatening medical emergency. All dental hygiene practitioners should be aware of potential risks that a patient may present, take steps to prevent life-threatening events from occurring, and plan for problems in advance of their happening. The primary goal of this course is to help dental hygienists carry out the ethical, moral, legal, and professional obligation owed any patient. The course will review the basics of medical emergencies, with particular emphasis on those that are most likely to occur in the dental office. Discussion will center on general aspects of prevention and preparation, and will focus on the recognition and emergency treatment of specific conditions. Vasodepressor syncope, orthostatic hypotension, acute adrenal insufficiency, hyperventilation, asthma, heart failure and acute pulmonary edema, cerebrovascular accident seizures, hyperglycemia, hypoglycemia, myocardial infarction, angina pectoris, and anaphylaxis will be emphasized.
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PMID:Medical emergencies in the oral health care setting. 1131 57

Vasovagal syncope (VVS) is the commonest cause of syncope accounting for up to 60% of all cases. The head-up tilt-table test (HUTT) was first described as a diagnostic test for VVS in 1986 and is now in widespread use as a research and diagnostic tool. Vasovagal syncope was previously thought to be confined to younger patients but with the introduction of HUTT, it is now being diagnosed with greater frequency in the elderly. Research into the physiological changes in susceptible individuals during HUTT has greatly increased our understanding of the pathophysiological processes underlying VVS; in particular, the hypotensive response during VVS is associated with sympathetic withdrawal rather than bradycardia alone. Various provocation agents, including nitrates, isoprotenerol and lower body negative pressure have been described to improve the diagnostic yield of the HUTT. Glyceryl trinitrate is now routinely administered during HUTTs. Individuals with typical presentations and infrequent episodes do not require investigation with HUTT as history alone is often diagnostic. The head-up tilt-table test is, however, required with atypical features, seizure activity, occupational issues, and is more likely to be required in older patients. The practicalities of conducting the HUTT and limitations of HUTTs are also discussed.
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PMID:Head-up Tilt Table Testing: a state-of-the-art review. 1974 86

It is well established that convulsive movements often accompany syncopal events yet many patients with these clinical features are misdiagnosed with seizures and often referred to epilepsy centers because they are refractory to treatment with anticonvulsant medications. Tilt table testing is the gold standard for diagnosing vasodepressor syncope, but it can fail to provide clinical details that help distinguish convulsive syncope from epileptic seizures and psychogenic events. This study evaluates the diagnostic utility of the addition of video and EEG monitoring during tilt table testing for patients with refractory episodes of unexplained loss of consciousness. Retrospective analysis was performed of 40 consecutive patients who were referred to the Emory Epilepsy Center and underwent tilt table testing with concomitant video-EEG between March 1, 2007 and December 1, 2008. EEG was recorded throughout the study in addition to video recording and single channel EKG. Events were classified as vasodepressor syncope, presyncope, or psychogenic. Tilt combined with video EEG was diagnostic in 26/40 (65%) of patients. Vasodepressor syncope was seen in 17/40 (42.5%), 9 of which had associated involuntary movements. Three patients experienced psychogenic non-epileptic events. Antiepileptic drugs (AEDs) were being prescribed for 17 patients, 7 of which were discontinued as a result of the testing. The majority of patients (38/40) had undergone prior neurological and cardiac evaluation with routine EEG, neuroimaging and/or Holter monitoring. Patients with convulsive syncope are often misdiagnosed and treated with AEDs despite prior neurodiagnostic and cardiac evaluation. Tilt table testing with video-EEG is useful in patients with refractory episodes of unexplained loss of consciousness and can avoid expensive non-diagnostic evaluations as well as ongoing treatment with unnecessary AEDs.
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PMID:Tilt table testing with video EEG monitoring in the evaluation of patients with unexplained loss of consciousness. 2187 Apr 74

Severe cardioinhibitory vasovagal syndrome is characterised by syncope accompanied by cardiac asystole which may lead clinically to seizure-like motor activity. Vasovagal syncope usually occurs in erect posture and is often provoked by emotional or physical triggers. We report two patients who presented with severe cardioinhibitory vasovagal syncope accompanied by cardiac asystole resulting in seizure-like motor manifestations in sleep and supine posture. Both cases were initially diagnosed as epilepsy and treated with antiepileptic drugs. We discuss the putative mechanisms of this rare condition and its potential for misdiagnosis as epilepsy.
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PMID:Severe cardioinhibitory vasovagal syncope in sleep and supine posture. 2455 76

Dental hygienists in Poland work in various settings, including public health care institutions, private dental practices, dental clinics, kindergartens, and schools. They can often face medical emergencies, whose rate is increasing owing to comorbidities and aging of dental patients' populations. The aim of the study was to assess the prevalence of medical emergencies in dental hygienists' practice in Poland and the hygienists' preparedness and attitudes toward emergencies.A 10-question authors' own questionnaire was filled in by 613 dental hygienist. It referred to their cardiopulmonary resuscitation training, availability of emergency medical equipment in the workplace, the prevalence of medical emergencies including the need for an emergency medical service (EMS) call, and the management of cardiac arrest.Overall, 613 dental hygienists working in Poland participated in the study; 38.99% had taken part in basic life support (BLS) training within the previous 12 months and 35.89% within 2 to 5 years; 15.17% had experienced at least 1 emergency situation requiring an EMS call within the previous 12 months. Vasovagal syncope was the most common medical emergency (15.97%), followed by moderate anaphylactic reaction (13.87%), seizures (8.81%), hyperventilation crisis (7.50%), and hypoglycemia (7.34%).The most common medical emergency in dental hygienists' practice in Poland is syncope followed by mild anaphylactic reaction. Most of the dental hygienist had participated in a BLS course within the previous 5 years; however, 20% of them have never participated since graduation. Dental hygienists should participate in BLS courses every 2 years to keep the cardiopulmonary resuscitation skills and stay up-to-date with current guidelines. An important part of the study participants declare the lack of availability in their workplaces of life-saving equipment, including self-expanding bag resuscitator, oropharyngeal, and supraglottic airway device and oxygen source. Medical emergency equipment as recommended in the international guidelines should be available in every practice.
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PMID:Medical emergencies in dental hygienists' practice. 3134 10