Philips HeartStart XL M4735A Defibrillator

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HeartStart XL M4735A Features

The Philips HeartStart XL M4735A defibrillator and monitor is designed to meet your resuscitation and monitoring needs. The HeartStart XL is lightweight, portable, and a semi-automatic external defibrillator. It offers two modes of operation; Automated External Defibrillation (AED) Mode and Manual Mode. Both modes incorporate low-energy SMART Biphasic waveform for defibrillation. When in AED mode, the HeartStart analyzes the patient’s ECG and advises you whether or not to deliver a shock.

In AED Mode, the HeartStart analyzes the patient’s ECG and advises you whether or not to deliver a shock. Voice prompts guide you through the defibrillation process by providing instructions and patient information. Voice prompts are reinforced by messages that appear on the display.

In Manual Mode, the M4735A HeartStart turns control of the defibrillation process over to you. You assess the patient’s ECG and select the energy settings for defibrillation if necessary. Manual Mode also allows you to perform synchronized cardioversion and offers noninvasive pacing (optional).

The HeartStart is powered by AC power and a rechargeable sealed lead-acid (SLA) battery which allows charging to 200 joules in less than three seconds. Proper care of your batteries will ensure that they have the energy required to operate the M4735A and to deliver the appropriate therapy.

  • Manual or AED defibrillation modes.
  • The HeartStart Delivers up to 200 joules in less than three seconds.
  • ECG Monitoring with 3 or 5 lead patient cables on the HeartStart.
  • Up to 100 hours of monitoring, or 50, 200-joule charge-shock cycles on the HeartStart battery power.
  • EL or LCD Display.

HeartStart XL M4735A Specifications

HeartStart Dimensions

  • Height: 7.5 in (19 cm)
  • Width: 14.8 in (37.6 cm)
  • Depth: 13.7 in (34.6 cm)
  • Weight: 13.2 lbs (6 kg)

HeartStart Battery

  • Type: HeartStart Rechargeable Sealed lead acid
  • Operating Time: About 100 minutes
  • Charging Time: About 14.5 hours
  • Power: 2 Ah, 1

HeartStart Display (EL)

  • Type: EL – Electroluminescent
  • Size: 4.5″ x 3.4″ (11.5 cm x 8.6 cm)
  • Resolution: 320 x 240
  • Sweep Speed: 29 mm/s nominal
  • Viewing Time: 4 Seconds

HeartStart Display (LCD)

  • Type: LCD – TFT Color Liquid Crystal Display
  • Size: 4.3″ x 3.3″ (11.1 cm x 8.4 cm) on the HeartStart
  • Resolution: 320 x 240
  • Sweep Speed: 29 mm/s nominal
  • Viewing Time: 4 Seconds


  • AC Line Powered: 100-240 VAC, 50/60 Hz, 1.5 A

HeartStart ECG Monitoring

  • Size: 2.5, 5, 10, 20, 40 mm/mV
  • Heart Rate: 15 to 300 bpm
  • Inputs: 3 or 5-lead patient cable

SpO2 Monitoring

  • Range: SpO2: 0 to 100%; Pulse Rate: 30 to 300 bpm
  • Pulse Rate Accuracy: 2% or 1 bpm (whichever is greater)
  • Wavelength Range: 500 to 1000 nm
  • Emitted Light Energy: = to 15 mW
  • Display Update Interval: = 60 seconds
  • Resolution: 1%

Synchronized Cardioversion

  • Yes in manual mode

Noninvasive Pacing on the

  • Waveform: Monophasic Truncated Exponential
  • Current Pulse Amplitude: 10 mA to 200 mA (5 mA Resolution); Accuracy 10 mA to 50mA ± 5mA, 50 mA – 200mA ± 10%
  • Pulse Width: 20 ms with accuracy of +0, -5 ms
  • Rate: 30 ppm to 180 ppm (10ppm increments); accuracy ± 1.5%
  • Modes: Demand or Fixed Rate
  • Refractory Period: 340 msec (30 to 80 ppm); 240 msec (90 to 180 ppm)

Event Storage

  • Internal storage up to 300 events and 50 ECG strips at 11 seconds each
  • Events can be marked with a Mark symbol and, if configured for dug annotation, the following labels can be added: Epinephrine (Adrenaline in U.K. & Australia, Atropine, Lidocaine, or other.
  • Data Card Event Summary: One Data Card can store a minimum of 2 hours of continuous ECG waveforms and events.

Thermal Array Printer

  • Continuous Real-Time Strip: The user starts and stops the strip. The strip prints the selected ECG lead.
  • Event Printing: Mark key automatically documents ECG and events during defibrillation episodes. The Mark key can annotate the event with one of the following labels: Epinephrine (Adrenaline), Atropine, Lidocaine, and other
  • Auto Printing: The printer can be configured to automatically print on Mark, Charge, Shock, and Alarm
  • Delayed Printing: The printer can be configured to run in real-time or with a 6-second delay
  • Speed: 25 mm/s with an accuracy of ± 5%
  • Amplitude Accuracy: ± 10% or ± 50 uV, whichever is greater
  • Paper Size: 50 mm by 30 m (100 ft)



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