CHELMSFORD, Mass.--(BUSINESS WIRE)--ZOLL Medical Corporation (Nasdaq GS: ZOLL), a manufacturer of resuscitation devices and software solutions, today announced that preliminary revenues for the second quarter were approximately $90 - $92 million, down approximately 8% from revenues in the same period last year. The Company’s revenues fell short of expectations primarily due to lower than expected sales to the North American hospital market including less than expected military revenues. Additionally, revenues from the sale of AEDs were lower than anticipated. The Company estimates that earnings per share for the quarter will be in the range of $0.05 to $0.10, falling below the consensus earnings estimate of $0.24.