Circuits are grounded for the. purpose of limiting the voltage upon the circuit which might. otherwise occur through exposure to lightning or other voltages. higher than that for which the circuit is designed; or to limit. the maximum potential to ground due to normal voltage. (b) Exposed Enclosures.
More important, there are differences in the underlying cause of these two types of heart attack and, therefore, in the initial treatment. A STEMI heart attack is caused when a blood clot suddenly forms, completely blocking an artery in the heart. This can result in damage that covers a large area of the heart and extends deep into the heart muscle.
In these patients, post-operative inflammation promotes the leakage of fluid from tiny blood vessels in the macula. Other common causes of CME include diabetic retinopathy, wet age-related macular degeneration, uveitis, and retinal vascular disease. CME can also occur due to mechanical traction from a macular pucker. Less common causes include past exposure to radiation, retinitis pigmentosa, and intraocular tumors.