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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Easy to use, fast to respond || KBA1
Easy to use, fast to respond

Easy to use, fast to respond

The HeartStart MRx has an easy-to-use interface that helps you respond quickly. Communication and collaboration with your hospital care teams is simple. And when it’s time to hand-off from a HeartStart FR3, you don’t need to change pads.
Rich clinical information, driving pa... || KBA1

Rich clinical information, driving patient care

With the DXL 12-Lead ECG algorithm, the HeartStart MRx gives advanced STEMI decision support. There are predictive tools that show the probability that the patient is experiencing acute ischemia or the likely outcome of AMI. These tools help you make confident decisions to speed triage.
Built to endure, designed to evolve || KBA1

Built to endure, designed to evolve

The HeartStart MRx is built tough—tough enough to endure environmental conditions created by water, vibrations, mechanical shocks, drops, and electromagnetic activity. Plus it’s built on a scalable platform, so you can upgrade easily and take advantage of Philips advancements while retaining the same footprint and weight.

Specifications Show all

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)
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).
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)
6.3 Ah, 14.8 V, rechargeable lithium ion
At least 5 hours of continuous 12-lead ECG/SpO2 and CO2 monitoring. With NBP every 15 minutes on one new fully charged battery. hr
6.5" (H) x 3.8" (W) x 1.6" (D) (165 mm x 95 mm x 42 mm)
1.6 lb. (0.73 kg)
Charge Time
Approximately 3 hours from fully depleted to 100%. 90 minutes from fully depleted to 80%
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. hr
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)
End-tidal CO2
0 to 99 mm Hg
1 mmHg (0.1 kPa)
Sample Size
50 ml per minute ml
Alarm Range(h)
Low Limit: 10 to 95 mmHg (Adult/Pediatric) mm Hg
Alarm Range(i)
High Limit: 20 to 100 mmHg (Adult/Pediatric) mm Hg
Environmental & physical requirements
Solids/Water resistance
Operating temperature
0º - 45º C (32º - 113º F)
Storage temperature
-20 - 70º C (-4º - 158º F)
Operating humidity
0% to 95% relative %
Operating altitude
0 to 15000 ft (0 to 4500 m)
Storage altitude
0 to 15000 ft (0 to 4500 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)
TFT color LCD
480 x 640 pixels (VGA)
Wave Viewing Time
5 seconds (ECG) sec
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.
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 sec
Minimum Patient Impedance Range
15 Ohm (internal defibrillation); 25 Ohm (external defibrillation)
Maximum Patient Impedance Range
180 Ohm
AED Mode
Shock advisory sensitivity and specificity meet AAMI DF-39 guidelines
Noninvasive Blood Pressure
Pressure Range(a)
Systolic: 40 to 260 mm Hg
Pressure Range(b)
Diastolic: 20 to 200 mm Hg
Initial Pressure
Adult: 160 mmHg and Pediatric: 120 mm Hg
Maximum Pressure
280 mm Hg
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)
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
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
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%
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
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 sec
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
Compression Depth
Target: -1.50 to -2.00" (-38 to -51 mm)
Compression Rate
Target: 90 to 120 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
Ventilation Rate(b)
Target for breaths delivered beyond 60 seconds since last compression: 9 to 16 vpm
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
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)