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A 71-year-old woman is brought to the emergency department due to not feeling well and worsening right leg weakness. The patient had a stroke 2 years ago and has mild residual right leg weakness. Over the last 2 days, her weakness has gotten worse compared to her baseline, and she can hardly ambulate with a cane. The patient has a history of persistent atrial fibrillation and takes daily warfarin.
Her temperature is 38.3 C (101 F) , blood pressure is 150/90 mm Hg, pulse is 94/min, and respirations are 14/min. Pulse oximetry shows 97% on room air. Neurologic examination shows spastic right lower extremity weakness and hyperreflexia. A noncontrast head CT reveals an old infarct in the left anterior cerebral artery territory.
Laboratory results are as follows:
Which of the following is the most likely explanation for this patient's symptoms?
Voltage
The measure of electrical potential difference between two points in an electric field, driving electric current between those points.
Magnetic Polarity
Refers to the orientation of the magnetic field, denoted by north and south poles, determining the direction in which a magnetic field is applied.
Electromagnetic Field
A physical field produced by electrically charged objects, affecting the behavior of charged objects in its vicinity.
CEMF
Counter Electromotive Force, which is the voltage generated by a running motor or generator that opposes the applied voltage.
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