Ischemic ATN occurs when the tubular cells do not get enough oxygen, a condition that they are highly sensitive and susceptible to, due to their very high metabolism. Diagnosis. Acute tubular necrosis is classified as a renal (i.e. not pre-renal or post-renal) cause of acute kidney injury. Diagnosis is made by a FENa (fractional excretion of sodium) > 3% and presence of muddy casts (a type of granular cast) in urinalysis.
A Rhyming Couplet is two line of the same length that rhyme and complete one thought. There is no limit to the length of the lines. Rhyming words are words that sound the same when spoken, they don't necessarily have to be spelt the same.
Heroic Couplet. Definition: Heroic couplets are rhyming pairs of verse in iambic pentameter. What on earth did these couplets do to become heroic? Did they pull a cat out of a tree or save an old lady from a burning building? In fact, no. They're called heroic because in the old days of English poetry they were used to talk about the trials and adventures of heroes. Heroic couplets totally ruled the poetry scene for a long time, especially in the 17th and 18th centuries, when a dude named Alexander Pope was rocking the neoclassical world with works like Sound and Sense, which just so happens to be written in heroic couplets.