hyperkalemic periodic paralysis (redirected from Impressive Syndrome)

hy·per·ka·le·mic periodic paralysis (hpr-k-lmk)

n.

An inherited form of periodic paralysis in which the serum potassium concentration is elevated during attacks. Onset occurs in infancy and condition is marked by frequent but mild attacks with myotonia often present.

---

hyperkalemic periodic paralysis

inherited autosomal dominant defect in Quarter horses, probably as a result of selective breeding for muscling. A form of exertional rhabdomyolysis manifest by episodic weakness, muscle tremor and sometimes paresis, or pharyngeal and laryngeal dysfunction. There is an abnormality in the sodium channel and disturbance in flux of sodium and potassium across the muscle wall. Called also episodic muscular weakness.