Philips Healthcare Inc.: Philips HeartStart MRx Monitor/Defibrillator, Model numbers M3535A, M3536A, M3536J, M3536M, M3536MC, M3536M2, M3536M4, M3536M5, M3536M6 The device is for use by qualified medical personnel trained in the operation of the device and qualified by training in basic life support, advanced cardiac support, or defibrillation. It must be used by or on the order of a physician

Recall number

Z-1797-2013

Recalling firm

Philips Healthcare Inc.

Product

Philips HeartStart MRx Monitor/Defibrillator, Model numbers M3535A, M3536A, M3536J, M3536M, M3536MC, M3536M2, M3536M4, M3536M5, M3536M6 The device is for use by qualified medical personnel trained in the operation of the device and qualified by training in basic life support, advanced cardiac support, or defibrillation. It must be used by or on the order of a physician

Status

Terminated

Initiated

2013-06-19

Posted

2013-07-24

Terminated

2016-12-16

Reason

The MRx may deliver a non-synchronized cardioversion shock resulting in the delivery of incorrect therapy, which may induce ventricular fibrillation.

Root cause

Software design

Action

Philips sent an Urgent Medical Device Correction letter on June 19, 2013, to all affected customers. The letter informed customers of the issue, identified details of the units affected, gave instructions on actions to be taken by the customer and identified what action Philips planned to take to remedy the issue. Philips will perform a software upgrade and replace the label on the unit that outlines the steps for Synchronized Cardioversion with a revised label for all affected units at no charge to the customer. Philips is asking customers to follow the Action to be Taken by Customer/User section of the Urgent Medical Device Correction notification/Field Safety Notice: You can continue to use your MRx prior to receiving the software upgrade and device label revision, provided that you follow the instruction provided. Customers with questions were instructed to contact their local Philips representataive or call 1-800-722-9377. For questions regarding this recall call 978-687-1501.

Quantity

66,150 units

Distribution

Worldwide Distribution - USA (nationwide) and countries of: AFGHANISTAN ALBANIA ARGENTINA ARUBA AUSTRALIA AUSTRIA AZERBAIJAN BAHRAIN BANGLADESH BELGIUM BOLIVIA BOSNIA AND HERZEGOWINA BRAZIL BRUNEI DARUSSALAM BULGARIA CAMBODIA CHILE CHINA COLOMBIA COSTA RICA CROATIA (local name: Hrvatska) CYPRUS CZECH REPUBLIC DENMARK ECUADOR EGYPT EL SALVADOR ESTONIA ETHIOPIA FINLAND FRANCE GERMANY GREECE GUADELOUPE HONG KONG ICELAND INDIA INDONESIA IRAQ IRELAND ISRAEL ITALY JAPAN JORDAN KAZAKHSTAN KENYA KOREA, REPUBLIC OF KUWAIT LAOS LATVIA LEBANON LIBYAN ARAB JAMAHIRIYA LITHUANIA LUXEMBOURG MACAU MACEDONIA MALAYSIA MALTA MEXICO MONGOLIA MOROCCO NAMIBIA NEPAL NETHERLANDS NETHERLANDS ANTILLES NEW CALEDONIA NEW ZEALAND NICARAGUA NIGERIA NORWAY OMAN PAKISTAN PALESTINE PANAMA PAPUA NEW GUINEA PARAGUAY PERU PHILIPPINES POLAND PORTUGAL PUERTO RICO QATAR REUNION ROMANIA RUSSIAN FEDERATION SAUDI ARABIA SERBIA SINGAPORE SLOVENIA SOUTH AFRICA SPAIN SRI LANKA SWEDEN SWITZERLAND TAIWAN, PROVINCE OF CHINA TANZANIA, UNITED REPUBLIC OF THAILAND TRINIDAD AND TOBAGO TUNISIA TURKEY UGANDA UKRAINE UNITED ARAB EMIRATES UNITED KINGDOM UZBEKISTAN VENEZUELA VIET NAM and YEMEN.

Lot, serial or model codes

Serial numbers ranging from: US00100100 to US00567299 (serial numbers of the HeartStart MRx monitor/defibrillator are printed on the primary label on the back of the MRx in battery bay B)

510(k) numbers

["K051134"]

PMA numbers

not on file

Product code

MKJ

Firm FEI

1218950

Firm city

Andover

Firm state

MA

Firm country

not on file

Cite as

FDA Medical Device Recalls (openFDA) (U.S. Food and Drug Administration (openFDA)), device-recall-0001-of-0001.json.zip, sha256 b87518bfe2e8, published 2026-09-28

Copy