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NEW YORK ( TheStreet) -- Thoratec Corporation (Nasdaq: THOR) hit a new 52-week high Friday as it is currently trading at $37, above its previous 52-week high of $36.98 with 560,484 shares traded as of 1:50 p.m. ET. Average volume has been 847,900 shares over the past 30 days. Thoratec has a market cap of $2 billion and is part of the health care sector and health services industry. Shares are up 27.6% year to date as of the close of trading on Thursday. Thoratec Corporation develops, manufactures, and markets proprietary medical devices used for circulatory support. The company has a P/E ratio of 30.8, below the average health services industry P/E ratio of 32.6 and above the S&P 500 P/E ratio of 17.7.