May 11, 2004

FOR: ZOLL Medical Corporation

INVESTOR CONTACT: A. Ernest Whiton
Chief Financial Officer
ZOLL Medical Corporation
(978) 421-9655
PRESS CONTACT: Robert Minicucci
Corporate Communications Manager
ZOLL Medical Corporation
+1 (978) 421-9832
rminicucci@zoll.com



FOR IMMEDIATE RELEASE

ZOLL MEDICAL INTRODUCES CODENET FOR HOSPITALS -- FIRST CODE EVENT DATA MANAGEMENT SYSTEM

Tuesday, May 11, 2004 – CHELMSFORD, MASS.—ZOLL Medical Corporation (NASDAQ: ZOLL), a manufacturer of non-invasive cardiac resuscitation devices, will unveil CodeNet™, the first software system that allows hospital teams to better document, manage, and review cardiac arrest event and resuscitation information. CodeNet brings new improvements and efficiencies in data capture, event time synchronization, and case and aggregate reporting. It is the only system that time stamps logged events and synchronizes these times with defibrillator data, providing clinicians with a complete and accurate timeline of an entire cardiac arrest event.

CodeNet consists of two software applications: CodeNet Writer™, which is installed on a Pocket PC-based PDA and used to log code events, and CodeNet Central™, which is a database management system on a desktop or laptop computer. ZOLL will demonstrate CodeNet in its booth (#2149) at the 2004 National Teaching Institute™ and Critical Care Exposition (NTI) May 18-20 in Orlando, Florida.

“CodeNet is the first system that provides us with fast and easy electronic documentation of code events,” said Judy Boehm, M.S.N., R.N., CPR Program Clinical Nurse Specialist at Dartmouth-Hitchcock Medical Center, which is one of the first facilities to implement CodeNet hospital wide for adult cardiac arrest patients. “For the first time, we can synchronize defibrillator data with other events, so everything is on one complete, accurate timeline. Having this quality of information in one place significantly improves how we generate reports and analyze trends such as the time to first epinephrine, defibrillation, or invasive airway placement. Analyzing these trends will help us make ongoing improvements to our resuscitation efforts and improve patient care.”

To further enhance resuscitation efforts, ZOLL CodeNet will also feature an interface to the National Registry of Cardiopulmonary Resuscitation (NRCPR)*, a database established by the American Heart Association, allowing hospitals to validate and submit resuscitation data for review with the click of an icon. Hospitals that choose to participate in the NRCPR gain better measures of their resuscitation processes—from in-house trend reports to benchmarking against national averages.

CodeNet Writer: Data Completeness and Accuracy
CodeNet Writer allows clinicians to easily record event data (i.e., patient assessments, interventions, and outcomes) by tapping on icons organized by the ABCDs (Airway, Breathing, Circulation, Defibrillation) of resuscitation. This recording method allows for fast documentation of code events, which are automatically time stamped for improved accuracy. Additional features, such as time counters for both epinephrine and atropine, provide increased decision-support during a code event.

CodeNet Writer also allows defibrillator data to be downloaded into the PDA immediately following a code. All relevant data (i.e., ECG and parameter waveforms, shock levels, and shock sequences) can be downloaded via a serial cable or Bluetooth® wireless connection. Post-event quality information can also be easily documented via the CodeNet Writer PDA interface.

CodeNet Central: Time Synchronization and Reporting

After uploading individual code event files from CodeNet Writer, CodeNet Central automatically synchronizes time stamps between defibrillator data and logged code event data. For the first time, clinicians have a complete record of all code events on one timeline, stored in one electronic file.

Once data is uploaded to CodeNet Central, clinicians can easily review and edit case reports and prepare them for signature. Aggregate reports also are easily generated to monitor trends such as Survival by Arrest Type, Location, Initial Rhythm, or Time to First CPR, Epinephrine, Intubation, or Shock. These reports help to measure the quality of existing resuscitation programs so that clinicians can determine where program improvements can be made, as well as easily prepare for JCAHO audits.

Direct Interface with the NRCPR

CodeNet also allows clinicians who choose to participate in the NRCPR to validate and submit code event data to the NRCPR with the click of an icon. The NRCPR is a national database of in-hospital CPR events established by the American Heart Association. Based in part on the in-hospital Utstein guidelines, it is the largest registry of its kind. The NRCPR facilitates improvements in in-hospital resuscitation programs through quarterly benchmark reports, allowing participating hospitals to compare their resuscitation outcomes to aggregate results from hospitals of a similar size.

“As hospitals join the NRCPR and are able to better measure and record resuscitation data, a roadmap is established that can lead to additional research, improved practices and ultimately improved outcomes,” said Jerry Potts, Ph.D., Director of Science at the AHA’s Emergency Cardiovascular Care Programs.

About the NRCPR

The National Registry of Cardiopulmonary Resuscitation (NRCPR) is a national database of in-hospital resuscitation data, developed by the American Heart Association and Tri-Analytics, Inc. The NRCPR allows hospitals to collect and analyze data that can lead to more efficient evaluation and use of equipment, resources and training, and to the overall improvement of resuscitation practices and quality of care. The NRCPR also provides a dataset large enough to help researchers explore and answer questions about in-hospital resuscitation interventions.

About the American Heart Association

Since 1924, the American Heart Association has helped protect people of all ages and ethnicities from the ravages of heart disease and stroke. These diseases, the nation’s No. 1 and No. 3 killers, claim more than 930,000 American lives a year. The association invested more than $348 million in fiscal year 2002-03 for research, professional and public education, and advocacy so people across America can live stronger, longer lives.

About ZOLL Medical Corporation

ZOLL Medical Corporation (NASDAQ: ZOLL), with worldwide headquarters in Chelmsford, Massachusetts, designs, manufactures, and markets non-invasive cardiac resuscitation solutions. These solutions include pacing and defibrillation devices (ZOLL’s M Series™ and AED Plus™, and LIFECOR, Inc.’s LifeVest™ Wearable Defibrillator), circulatory assist devices (Advanced Circulatory Systems, Inc.’s ResQPOD™ Circulatory Enhancer and Revivant Corporation’s AutoPulse™); and a unique fluid resuscitation product called the Power Infuser®, manufactured by Infusion Dynamics, a division of ZOLL. These devices help health care professionals, emergency medical service providers, and first responders diagnose and treat cardiac arrest wherever it occurs. Through its subsidiary ZOLL Data Systems, ZOLL also designs and markets software that automates the collection and management of both clinical and non-clinical data.

ZOLL has sales operations in Australia, Austria, Canada, China, France, Germany, India, The Netherlands, Russia, the United Kingdom, and the United States, and business partners in all of the world’s major markets. For more information, visit www.zoll.com or call 978-421-9655.

Certain statements contained in this press release, including statements regarding the anticipated development of the Company’s business, our ability to differentiate our products from others on the market, and other statements contained herein regarding matters that are not historical facts, are "forward-looking" statements (as defined in the Private Securities Litigation Reform Act of 1995). Because such statements are subject to risks and uncertainties, actual results may differ materially from those expressed or implied by such forward-looking statements. Factors that could cause actual results to differ materially from those expressed or implied by such forward-looking statements include, but are not limited to, those factors discussed in the section entitled "Risk Factors" in the Company’s Quarterly Report on Form 10-Q filed with the SEC on February 18, 2004.
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Copyright © 2004 ZOLL Medical Corporation. All rights reserved. 269 Mill Road, Chelmsford, MA 01824-4105. AED Plus, CodeNet, CodeNet Central, CodeNet Writer, M Series, and ZOLL Data Systems are trademarks of ZOLL Medical Corporation. The LifeVest System is a trademark of LIFECOR, Inc. The ResQPOD is a trademark of Advanced Circulatory Systems, Inc. The AutoPulse Resuscitation System is a trademark of Revivant Corporation. Power Infuser is a registered trademark of Infusion Dynamics. ZOLL is a registered trademark of ZOLL Medical Corporation. All trademarks are property of their respective owners.

*This software is compatible with the NRCPR. This statement does not convey or imply the American Heart Association endorsement, or suggestion of superiority of this or any product or equipment. Additional subscription to the NRCPR is required.