Study on CPR During Ambulance Transport of Cardiac Arrest Patients Named "Best EMS Professional Research Presentation” at NAEMSP Conference

Zoll Medical Corporation (NasdaqGS: ZOLL) announced today that a study entitled, "Increased CPR Variability During Ground Ambulance Transport of Patients in Cardiac Arrest” presented by Ben Bobrow, M.D., Medical Director for the Arizona Department of Health Services, Bureau of Emergency Medical Services & Trauma System and the Maricopa Medical Center Resuscitation Science Center, was named the "Best EMS Professional Research Presentation” at the National Association of EMS Physicians (NAEMSP^®) 2010 Conference in Phoenix, Arizona. With data supplied from ZOLL E Series^® devices, the study concluded that healthcare providers are able to perform more consistent compressions when treating cardiac arrest patients at the scene as opposed to in the back of a moving ambulance.

This study was conducted with Guardian Medical Transport in Flagstaff, Arizona, and the Mesa Fire Department in Mesa, Arizona, as part of a larger Resuscitation Quality Improvement Program. The aim was to quantify and compare the quality of chest compressions at the scene of a resuscitation attempt and during transport. The research was undertaken in response to questions that had been raised about the safety and efficacy of performing manual chest compressions during the ambulance transport of patients in cardiac arrest.

Dr. Bobrow stated, "We found an increase in the variability of chest compression quality for the rate and depth of compressions in our two EMS agencies during the ground transport of cardiac arrest patients. Further investigation is needed to determine the causes of the increased variability along with the optimal timing and method of delivering manual chest compressions.”

The EMS agencies participating in the project utilized ZOLL E Series monitor-defibrillators with an accelerometer to continuously record chest compression quality during resuscitation both at the scene and during ambulance transport. The device’s built-in Real CPR Help^®, which provides real-time audiovisual feedback on the correct rate and depth of chest compressions, was inactivated. ZOLL’s Code Review software was used to collect data on chest compression quality during the time a patient was treated at the scene and in transport. The time during which the patient had spontaneous circulation was excluded from analysis as CPR would not have been required during those minutes. Variability was defined as the average of minute-by-minute standard deviations in depth or rate.

A total of 90 adult cardiac arrest events were electronically recorded, of which 45 included chest compressions both at the scene and in the ambulance. Variability in chest compression rate and chest compression depth was significantly greater during transport compared with at the scene. Absolute chest compression depth and chest compression rate tended to be lower during transport. Although not reaching statistical significance, the percentage of chest compressions in compliance with AHA 2005 guidelines for depth (1.5-2 in) and rate (100±10 compressions/minute) was nearly double at the scene compared with during transport.

"We are pleased that ZOLL technology was used in this study,” said Jonathan A. Rennert, President of ZOLL. "We are very committed to helping agencies conduct research that may ultimately result in improving outcomes from cardiac arrest.”

About Sudden Cardiac Arrest

SCA, an abrupt disruption of the heart’s function, which causes a lack of blood flow to vital organs, claims more than 1 million lives each year. It is the leading cause of unexpected death in the world and strikes without warning. Currently, only about 5 percent of victims survive; 95 percent will die from SCA.

About ZOLL Medical Corporation

ZOLL Medical Corporation develops and markets medical devices and software solutions that help advance emergency care and save lives, while increasing clinical and operational efficiencies. With products for defibrillation and monitoring, circulation and CPR feedback, data management, fluid resuscitation, and therapeutic temperature management, ZOLL provides a comprehensive set of technologies which help clinicians, EMS and fire professionals, and lay rescuers treat victims needing resuscitation and critical care.

A NASDAQ Global Select company and a Forbes 100 Most Trustworthy Company for the past three years, ZOLL develops and manufactures its products in the United States, in California, Colorado, Illinois, Massachusetts, Pennsylvania, and Rhode Island. More than 400 direct sales and service representatives, 1,100 business partners, and 200 independent representatives serve our customers in over 140 countries around the globe. For more information, visit www.zoll.com.

Certain statements contained in this press release, including statements regarding the future business of the Company, 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 11, 2010. You should not place undue reliance on the forward looking statements in this press release, and the Company disavows any obligation to update or supplement those statements in the event of any changes in the facts, circumstances, or expectations that underlie those statements.

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