Exhibit 21.1 LIST OF SUBSIDIARIES Bio-Detek, Incorporated, incorporated in Massachusetts ZMI France, S.A.R.L., incorporated in France ZMD Corporation, incorporated in Delaware ZOLL International, Inc., incorporated in U.S. Virgin Islands ZOLL Medical (U.K.) Ltd, incorporated in United Kingdom Westech Mobile Solutions. Inc., incorporated in Vancouver, B.C., Canada ZOLL Medical Deutchland (GmbH), incorporated in Germany ZOLL Medical Canada, incorporated in Canada. Pinpoint Technologies, Inc., incorporated in Delaware. ZOLL Medical France S.A., incorporated in France ZOLL Medical Australia Pty Limited, incorporated in Australia ZOLL International Holding BV, incorporated in the Netherlands Page 33 of 34