The first HC locus was mapped to the long arm of chromosome 14 (14q1) ( 7 ). The gene encodes the β-myosin heavy chain (MYH7) gene, and 50 different mutations have been identified worldwide ( 8 )( 9 )( 10 )( 11 ). [clinchem.aaccjnls.org]

They reported the existence of a disease gene located on the long arm of chromosome 14. Subsequently, they found this to be the gene encoding for beta cardiac myosin heavy chain. [emedicine.medscape.com]

Drug treatments can have several side effects, including low blood pressure, flushing, headache, dizziness, dry mouth, constipation, and nausea. [myresults.org]