Focal Seizure with Impaired Awareness

Key Diagnostic Features Supporting Focal Seizure with Impaired Awareness

The European Heart Journal guidelines suggest that a typical epileptic aura consists of a rising sensation in the abdomen (epigastric aura) and/or an unusual unpleasant smell, which is consistent with this patient's symptoms 1, 2, 3, 4, 5
Focal seizures are characterized by arising within networks of a single cerebral hemisphere and can have motor or nonmotor onset symptoms with impaired awareness, as seen in this patient 6
The staring spell is a non-motor manifestation indicative of focal impaired awareness, which is consistent with this patient's presentation 6

Absence seizures typically last only 5-15 seconds, not 30 seconds, and do not have an aura or prodrome, making this diagnosis less likely for this patient 1, 2
Post-ictal sleep does not occur with absence seizures; patients return immediately to baseline, which is not consistent with this patient's symptoms 1, 2
The epigastric aura is not characteristic of vasovagal syncope; syncope prodrome typically includes lightheadedness, blurring of vision, nausea, and feeling of cold sweating 1, 2, 3, 4, 5
The 30-second duration of unresponsiveness is too long for typical syncope; loss of consciousness in syncope is usually brief (seconds) 7
Post-event sleep for 2 minutes is not characteristic of syncope; patients with syncope typically regain clearheadedness immediately 1, 2, 3, 4, 5

Neurological evaluation is indicated as this patient is suspected to have epilepsy, according to the European Heart Journal guidelines 1, 2, 5
EEG should be obtained, though a normal interictal EEG cannot rule out epilepsy and must be interpreted in clinical context, as recommended by the European Heart Journal 1, 2, 5
Do not dismiss the epigastric sensation as "just anxiety" or gastrointestinal symptoms, as it may be a characteristic of focal seizures 1, 2, 3, 4, 5
Do not confuse the brief post-ictal sleep with normal tiredness after a stressful event, as it may be a sign of a seizure 1, 2, 3, 4, 5
Do not assume a normal interictal EEG rules out epilepsy; clinical diagnosis takes precedence, according to the European Heart Journal guidelines 1, 2, 5

Focal seizures originate in a specific area of the brain, affecting only one hemisphere initially, though they may spread to become more widely distributed, as defined by the International League Against Epilepsy's (ILAE) operational classification system 8, 9
The American College of Radiology recommends categorizing focal seizures based on awareness level, including focal aware seizures and focal impaired awareness seizures, with a strength of evidence based on the ILAE's 2017 revision 9, 10

The American Heart Association, as published in Circulation, notes that motor manifestations of focal seizures can include jerking of one extremity or one side of the body, abnormal facial movements, and small repetitive movements 11
Non-motor manifestations can include staring spells, which are indicative of focal impaired awareness, as reported in Circulation 11

The frequency of recurrence of focal seizures can be up to 94%, which is considerably higher than that for generalized seizures, according to the Journal of the American College of Radiology 9

The Journal of the American College of Radiology recommends using MRI for neuroimaging, as it is more sensitive than CT for detecting brain abnormalities, with a detection rate of up to 55% in children with seizures 9
MRI findings in focal seizures can detect developmental abnormalities, hemorrhage, neoplasm, and gliosis, and requires optimized epilepsy protocol with adequate spatial resolution and multiplanar reformatting, as stated in the Journal of the American College of Radiology 9

The American Heart Association, as published in Circulation, recommends that first aid providers activate EMS for first-time seizures, seizures lasting >5 minutes, multiple seizures without return to baseline, or seizures with complications, and minimize risk of injury by helping the person to the ground and clearing the area around them 11