Thoratec Reports 37 Percent Increase in Second Quarter Revenues From Continuing Operations

THORATEC CORPORATION

Reconciliation of GAAP to Non-GAAP  Forward-Looking Guidance from Continuing Operations

(Unaudited)

(in thousands, except for per share data)

For the Fiscal Year Ended 2010

From

To

66.50%

67.50%

Share-based compensation expense

0.50%

0.50%

67.00%

68.00%

For the Fiscal Year Ended 2010

From

To

$                       0.97

$                       1.01

Share-based compensation expense

0.13

0.13

Amortization of purchased intangibles

0.10

0.10

Impact of adoption of ASC 470-20

(0.01)

(0.01)

Income tax effect of non-GAAP income before tax

-

-

$                       1.19

$                       1.23