AED Features

Regardless of the AED you select, the Food & Drug Administration has had to given the product clearance to be sold in the US. This mean the device has met some basic criteria.  All AED’s, regardless of brand, will be:

AED's provide rescuers with the ability to analyze a patient's heart rhythm without needing to know how to read an EKG trace.  A microcomputer determines whether or not the patient needs the therapy.  If the patient does not meet the criteria for electrical therapy, the unit refuses to discharge.  There is virtually no potential to harm a patient with unnecessary exposure to electricity with this unit.

AED's provide verbal instruction on the steps necessary to operate the device.  When turned on, the AED will immediately begin to talk to the rescuer and to provide instructions such as “connect electrodes to patient” and “analyzing – do not touch patient”.

AED's are configured from the manufacturer to test themselves at periodic intervals.  When a red flag (such as low battery life) comes up during a self-test, a visible indicator will be discernable on the device.

Modern AED’s are almost exclusively biphasic waveform.  This means when electrical discharge occurs, it travels in both directions from electrode to electrode.  While it would be generous to say that monophasic defibrillation (the previous standard) is obsolete, it is definitely dated technology and replacement should be considered if possible.

Another waveform decision is high energy delivery vs. low energy delivery.  Some AED’s will deliver a higher therapeutic dose of electricity (360 joules) vs others that deliver a lower maximum dose (150 or 200 joules).  Interestingly, both high energy and low energy devices produce similar survival statistics, and there is no preference for either treatment modality by the lead scientific agencies in the field such as the American Heart Association.  We favor low energy devices based on the theory that low doses of energy may cause less complications and side effects (such as heart tissue burning) as a result of the therapy.  Both devices that LSIS sells (see below) are low energy devices.


The ZOLL AED PLUS is ZOLL Corporation’s Automated External Defibrillator for the public-access market.  It represents the work of the second biggest defibrillator manufacturer in the world at coming up with an AED unit for the non-professional rescuer.

The ZOLL AED PLUS unit is incorporates Rectilinear Biphasic Technology - branded by the FDA as superior to monophasic waveforms in converting ventricular fibrillation in high-impedance patients.  Unlike some competing units, the ZOLL AED PLUS uses low-energy biphasic impulses with a maximum delivery of 200 joules to convert ventricular fibrillation without the undue damage to heart muscle that is possible with higher energy shocks.

The ZOLL AED PLUS does more than just deliver electrical therapy.  It coaches the rescuer through the assessment for CPR. Procedures such as calling EMS and checking for breathing and circulation are depicted in the flashing graphics and through verbal prompts.  When performing CPR, the ZOLL AED PLUS gives feedback to the rescuer by measuring the amount of pressure applied to the patient's chest and providing corrective advice such as "PUSH HARDER" or "GOOD COMPRESSIONS".  The unit's metronome will beep at the recommended 100 compressions per minute rate to keep rescuers on the correct pace for chest compressions.  No other AED has so many CPR resuscitation features.

For groups with good EKG skills, the ZOLL AED PLUS can be configured to display an EKG trace.  This allows clinical facilities to have some insight on the activity of the heart during the resuscitation process.  The unit's CPR enhancement features are also helpful as research suggests that saturation and fatigue tend to cause even professional rescuers to perform less-than-perfect CPR as resuscitation time goes on.

The ZOLL AED PLUS works on consumer Lithium 123 batteries.  This makes the cost of ownership of the unit significantly less than competing units with proprietary batteries.  Consider that most occupational settings end up not using their AED on a patient for years - the $100 - $250 cost of each proprietary battery that is consumed every 2 or so years (batteries have a 5-7 shelf life, but they get used up more quickly in a machine dues to self testing) tend to drive up the cost of owning a traditional AED.

The consumer lithium batteries are also very reliable.  The ZOLL unit runs on 10 batteries that provide 300 shocks in a resuscitation.  Even with if 5 individual batteries failed (an astronomically unlikely scenario), the unit would be able to deliver 150 shocks (more than enough to work many average resuscitations).

Current Special: AED, one set of electrodes, batteries, soft case, accessory kit, prescription
$1850.00 – Shipping included


The ZOLL AED PLUS retails for under $2000.  With batteries and pads, the unit lists for around $2100. 






Heartsine Technologies is a research and manufacturing firm with several respectable patents in cardiac therapies.  Their revolutionary Samaritan PAD AED is sleek, easy to use AED with a revolutionary battery system.

The most striking feature of the Samartian PAD AED is the small size of the unit.  It weighs 2 lbs / 1kg and it’s dimensions are 8” x 7.25” x 1.9”.  It will easily fit into a purse, response bag, glove compartment, desk drawer or other small area. In it’s carrying case, the unit is about the same height and width, and about 4” deep.

The Samaritan PAD AED has a cartridge system that integrates both the battery and the electrodes into one unit called a “PAD PAK”.  The PAD PAK has a 3 year shelf life, which results in only one date to track for each AED.  This smart design is not only more convenient, but also economical -  the PAD PAK retails for $99, making cost-of-ownership $33/year for each PAD PAK in the unit.  This is far below the combined battery and electrode cost of most other AED’s.

The Samaritan PAD AED is much more professional looking than competing AED’s in it’s price class.  It’s sharp exterior, pictorial prompting, and centralized button layout clearly suggests that it is of higher caliber and quality than competing units. 


The HEARTSINE SAMARITAN PAD retails for $1595.00 with softcase, accessory kit, and 2 sets of pads/batteries.  You can email us for the most current SAMARITAN PAD AED special pricing at .

Online Demo of the Samaritan PAD AED available by clicking here

Technical Details available by clicking here (PDF)

Zoll AED PlusGeneral Machine Info

Samaritan PAD General Machine Info

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