SALT LAKE CITY — A pair of Salt Lake companies this week announced that they have regained compliance with Nasdaq rules and will remain listed on the exchange. Dynatronics Corp. said it now complies with a requirement to have a $1 minimum bid price. The company manufactures, markets and distributes medical devices, orthopedic soft goods and supplies and rehabilitation equipment. WorldHeart Corp. said Friday it now complies with a rule requiring the company to have at least three independent directors on its audit committee for continued listing on the Nasdaq Capital Market. WorldHeart develops mechanical circulatory support systems.