Benzinga's Top #PreMarket Losers

Thoratec THOR fell 26.01% to $24.10 in pre-market trading after the company reported downbeat second-quarter sales and issued a disappointing 2014 earnings outlook.. PhotoMedex PHMD shares declined 5.91% to $10.18 in pre-market trading after the company reported weaker-than-expected Q2 results. Atmel ATML shares slipped 5.70% to $8.11 in pre-market trading after the company reported in-line Q2 earnings. Bank of America downgraded Atmel from Buy to Neutral. Melco Crown Entertainment MPEL dropped 4.02% to $28.81 in pre-market trading after the company reported Q2 earnings of $0.26 per share on revenue of $1.20 billion.