Advanced life support solutions

HeartStart MRx for EMS


As the first advanced networked monitor/defibrillator, HeartStart MRx incorporates many of the same algorithms, patient connections, and configuration choices as Philips premier bedside monitors.

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Discovery-to-Treatment approach

Discovery-to-Treatment approach saves time

We’ve enhanced our unique Discovery-to-Treatment approach to STEMI to provide cutting-edge STEMI Decision Support tools and reliable, cost-effective transmission capabilities from the pre-hospital team to your emergency department, chest pain observation center, or cath lab. Designed to speed appropriate care for suspected STEMI and N-STEMI patients.
Next generation Q-CPR

Next generation Q-CPR to enhance CPR quality

Philips and partner Laerdal Medical, innovated the Q-CPR™ measurement and feedback tool.* Next-generation Q-CPR offers the award-winning Q-CPR meter, configurable “voice prompts off” when silence is best, and visual feedback displayed directly on the meter and near the caregiver’s hands.
Advanced transmission

Advanced transmission to support teamwork

Based on our open systems approach, we offer Periodic Clinical Data Transmission of vitals and waveforms along with the 12-lead ECG. This allows EMS caregivers to send advance notification to the hospital using objective data for a range of patients to foster a higher level of teamwork.
Complete STEMI solution

Complete STEMI solution to streamline care

A complete STEMI solution from 12-lead transmission pre-hospital to cardiographs in the emergency department and cath lab solutions, all to benefit more seamless patient care.
Enhanced DXL 12-Lead ECG Algorithm

Enhanced DXL 12-Lead ECG Algorithm enhances women's care

This device features the enhanced DXL 12-lead ECG algorithm which detects the STEMI Culprit Artery (CA) and offers enhanced criteria to better recognize and interpret cardiac symptoms in women.
Critical Value statements

Critical Value statements to speed delivery of urgent care

Critical Value summary statements are boldly displayed to to highlight life-threatening conditions requiring immediate clinical attention. This has the potential to reduce the time from discovery to treatment.


Physical dimensions Defibrillator model HeartStart MRx (M3536A)
Physical dimensions Defibrillator model HeartStart MRx (M3536A)
Size without external paddles
  • 12.4" (W) x 7.7" (D) x 11.7" (H) (313 mm x 195 mm x 295 mm) "/mm
Physical dimensions
Physical dimensions
Size with external paddles
  • 12.4" (W) x 7.7" (D) x 13.4" (H) (313 mm x 195 mm x 340 mm) "/mm
  • 13.2 lbs. (6 kg): base unit with 1 battery/pads and pads cable. 13 lbs. (5.9 kg) with optional 75 mm strip chart printer. Paddle tray and external standard paddles add less than 2.5 lbs. (1.1 kg). Carrying case adds 4.1 lbs. (1.86 kg). lbs/kg
Environmental & physical requirements
Environmental & physical requirements
Solids/Water resistance
  • IP24
Operating temperature
  • 0º - 45º C (32º - 113º F) ° C/° F
Storage temperature
  • -20 - 70º C (-4º - 158º F) ° C/° F
Operating humidity
  • 0% to 95% relative %
Operating altitude
  • 0 to 15000 ft (0 to 4500 m) ft/m
Storage altitude
  • 0 to 15000 ft (0 to 4500 m) ft/m
Mechanical shock
  • Bump: IEC 68-2-29
  • Freefall: IEC 68-2-32
Operating vibration
  • MIL STD 810E 514.4 Category 6 Helicopter
General storage vibration
  • UH60 Non-Operating: IEC 68-2-6 Swept Sine Vibration and IEC 68-2-64 Random Vibration
  • Meets EN 60601-1, UL 2601-1/CSA C22.2 No. 601-1
  • 8.4’’ diagonal (128 mm x 171 mm) "/mm
  • TFT color LCD
  • 480 x 640 pixels (VGA) VGA
Wave Viewing Time
  • 5 seconds (ECG) seconds
  • Truncated Exponential Biphasic.Waveform parameters adjusted as a function of patient impedance.
Output Energy
  • Manual (selected): 1-10/15/20/30/50/70/100/120/150/170/200 Joules into a 50 Ohm load AED Mode (single energy output): 150 Joules into a 50 ohm load. Joules/Ohm
Charge Time
  • Less than 5 seconds to 200 Joules with a new/ fully charged lithium ion battery at 25º C
Shock Delivery
  • Via multifunction defib electrode pads or paddles
Shock-to-Shock Cycle Time
  • Typically less than 20 seconds seconds
Minimum Patient Impedance Range
  • 15 Ohm (internal defibrillation); 25 Ohm (external defibrillation) Ohm
Maximum Patient Impedance Range
  • 180 Ohm Ohm
AED Mode
  • Shock advisory sensitivity and specificity meet AAMI DF-39 guidelines
  • 6.3 Ah, 14.8 V, rechargeable lithium ion Ah/V
  • 6.5" (H) x 3.8" (W) x 1.6" (D) (165 mm x 95 mm x 42 mm) "/mm
  • 1.6 lb. (0.73 kg) lb/kg
Charge Time
  • Approximately 3 hours from fully depleted to 100%. 90 minutes from fully depleted to 80% hours/%
  • At least 5 hours of continuous 12-lead ECG/SpO2 and CO2 monitoring. With NBP every 15 minutes on one new fully charged battery. hours
  • At least 3.5 hours of continuous 12-lead ECG/SpO2 and CO2 monitoring. With NBP every 15 minutes and pacing at 180 ppm at 160 mA on one new fully charged battery. hours
Battery Indicators
  • Battery gauge on battery/capacity indicator on display. Flashing RFU indicator/chirp and ‘Low Battery’ message appears on display for low battery condition when 10 minutes of monitoring time and 6 maximum energy discharges remain (with a new battery at room temperature of 25º C)
Strip Chart Recorder
Strip Chart Recorder
  • Standard: 50 mm (paper width) thermal array printer mm
  • Optional: 75 mm (paper width) thermal array printer mm
Continuous ECG Strip
  • Prints primary ECG lead with event annotations and measurements in real-time or with 10-second delay
Auto Printing
  • Recorder can be configured to print marked events/charge/ shock and alarms
  • Event Summary, 12-Lead/Operational Check/ Configuration/Status Log and Device Information
Paper Size
  • 1.97” (50 mm) W by 100 ft. (30 m) L and 2.95” (75 mm) W by 100 ft. (30 m) L "/ft/mm/m
Data storage
Data storage
  • 12 hours of continuous ECG waveforms and events. Plus 50 12-lead ECG reports
Data Card
  • 12 hours of continuous ECG waveforms and events. Plus 50 12-lead ECG reports on a CompactFlash memory card
ECG and arrhythmia monitoring
ECG and arrhythmia monitoring
  • Up to 4 ECG waves displayed and up to 3 ECG waves print simultaneously.
  • Lead I, II, or III obtained through 3-lead ECG cable and separate monitoring electrodes. With 5-lead cable, obtain leads I/II/III/aVR/aVL/ aVF or V. Pads ECG obtained through 2 multifunction defibrillation electrode pads.
Lead Fault
  • ‘Lead Off ’ message and dashed line displayed if an electrode or lead wire becomes disconnected.
Pads Fault
  • Dashed line displayed if a pad becomes disconnected.
Heart Rate Display
  • Digital readout on display 15 to 300 bpm with accuracy ±10% bpm/%
Heart Rate/Arrhythmia Alarms
  • HR/Asystole/VFIB/VTACH/VTACH/extreme tachycardia/extreme bradycardia/PVC rate.
ECG Size
  • 2.5/5/10/20/40 mm/mV autogain mm/mV
SpO2 pulse oximetry
SpO2 pulse oximetry
  • 0 to 100% %
  • 0.01 %
Alarm Range(a)
  • Low Limit: 50 to 99% (Adult/Pediatric) %
Alarm Range(b)
  • High Limit: 51 to 100% (Adult/Pediatric) %
Alarm Delay
  • 10 seconds
Noninvasive Blood Pressure
Noninvasive Blood Pressure
Pressure Range(a)
  • Systolic: 40 to 260 mmHg mmHg
Pressure Range(b)
  • Diastolic: 20 to 200 mmHg mmHg
Initial Pressure
  • Adult: 160 mmHg and Pediatric: 120 mmHg mmHg
Maximum Pressure
  • 280 mmHg mmHg
Alarm Range(d)
  • Systolic high limit: 30 - 270 (Adult) and 35 - 180 (Pediatric)
Alarm Range(e)
  • Systolic low limit: 30 - 265 (Adult) and 30 - 175 (Pediatric)
Alarm Range(f)
  • Diastolic high limit: 18 - 240 (Adult) and 18 - 150 (Pediatric)
Alarm Range(g)
  • Diastolic low limit: 10 - 240 (Adult) and 10 - 145 (Pediatric)
End-tidal CO2
End-tidal CO2
  • 0 to 99 mmHg mmHg
  • 1 mmHg (0.1 kPa) mmHg/kPa
Sample Size
  • 50 ml per minute ml
Alarm Range(h)
  • Low Limit: 10 to 95 mmHg (Adult/Pediatric) mmHg
Alarm Range(i)
  • High Limit: 20 to 100 mmHg (Adult/Pediatric) mmHg
12-Lead ECG
12-Lead ECG
  • 12-Lead cable: leads I/II/III/aVR/aVL/ aVF and V/C1-V/C6
Display View
  • All 12-lead ECG waves display simultaneously
Strip Recorder
  • All 12-leads print on the strip chart printer in 3x4 format
  • CompactFlash data card; Bluetooth® dial-up Internet connection, Bluetooth® FTP
CPR feedback and measurement
CPR feedback and measurement
Compression Depth
  • Target: -1.50 to -2.00" (-38 to -51 mm) "/mm
Compression Rate
  • Target: 90 to 120 cpm cpm
Ventilation Volume
  • Graphic indicator: empty/one-third full/two-thirds full/full
Ventilation Rate(a)
  • Target for breaths delivered before 60 seconds since last compression: 6 to 16 vpm seconds/vpm
Ventilation Rate(b)
  • Target for breaths delivered beyond 60 seconds since last compression: 9 to 16 vpm seconds/vpm
Noninvasive pacing
Noninvasive pacing
  • Monophasic Truncated Exponential
Current Pulse Amplitude
  • 10 mA to 160 mA (5 mA resolution); accuracy 10 mA to 50 mA ± 5 mA, 50 mA - 160 m A ± 10% mA
Pulse Width
  • 40 ms with ± 10% accuracy ms/%
  • 30 ppm to 180 ppm (10 ppm increments); accuracy ± 1.5% ppm
  • Demand or Fixed Rate
Refractory Period
  • 340 msec (30 to 80 ppm); 240 msec (90 to 180 ppm) msec/ppm
  • * Q-CPR is a trademark of Laerdal Medical.