myotonic syndrome potassium-aggravated myotonia https://github.com/monarch-initiative/mondo/issues/4521 https://www.malacards.org/card/myotonia_potassium_aggravated K-aggravated myotonia UMLS:C2931826 OMIM:608390 icd11.foundation:1707250468 SCTID:702355008 NANDO:1200500 Potassium-aggravated myotonia (PAM) is a muscular channelopathy presenting with a pure myotonia dramatically aggravated by potassium ingestion, with variable cold sensitivity and no episodic weakness. This group includes three forms: myotonia fluctuans, myotonia permanens, and acetazolamide-responsive myotonia. GARD:0004459 Orphanet:612 myotonia congenita, atypical, acetazolamide-responsive MEDGEN:444151 Potassium aggravated myotonia NCIT:C122788 PAM MESH:C538353 MONDO:0018959 K+-aggravated myotonia hereditary skeletal muscle disorder SCN4A-related channelopathy