Heart Defibrillator

AEDs Guide The User With Instructions

Various Forms and Uses of a Defibrillator

In the field of medicine, a defibrillator plays a very essential role. When heartbeat becomes dangerously fast and chaotic due to ventricular fibrillation or ventricular tachycardia, defibrillators deliver an electrical shock to the heart to restore a normal heart rhythm. Using it helps prevent cardiac arrest and cardiac death from happening. Patients with cardiomyopathy, arrhythmogenic right ventricular dysplasia, QT syndrome or survivors of sudden cardiac death require defibrillation.

For life-threatening cardiac arrhythmias ventricular fibrillation and pulseless ventricular tachycardia, defibrillation is the definitive treatment. In this treatment, a defibrillator is used to deliver a therapeutic dose of electrical energy to the affected heart. Before the affected heart suffers from sudden cardiac arrest, defibrillation works to restore normal heart rhythms. It depolarizes a critical mass of the heart muscle, ends the arrhythmia, and reestablishes normal sinus rhythm.

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There are different forms and sizes of defibrillators. Those types you see in a hospital are called manual defibrillators or defibrillator paddles or, and they can only be operated by healthcare professionals. On the other hand, the AED can be used by lay people with only less training, which is handy for emergency purposes where no healthcare professional is around. ICDs or implantable cardio-verter defibrillators are implantable in the patient’s chest.

Manual defibrillators can either be external or internal. External types work with electrocardiogram readers, which allow the clinician to diagnose a cardiac condition. Then, basing on previous knowledge and experience, the clinician will deliver the appropriate charge in joules through pads or paddles on the patient’s chest. Doing so requires detailed medical knowledge, and for this reason, these units are usually found only in hospitals and some ambulances.

Manual internal defibrillators are similar to manual external defibrillators. Only, internal leads which are in direct contact to the heart are used to deliver the shocks. The leads function both ways: either to detect an abnormal rhythm or to deliver the actual shock. Usually, you can find such units in operating rooms, where the chest is likely to be open, or can be easily opened by a surgeon.

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For emergency purposes, automated external defibrillators are available. These units rely on computer technology to analyze the heart rhythm and advise whether a shock is needed. AEDs can be used by lay persons, who call for little training. Generally, they are held by qualified personnel who will attend incidents or are PADs or public access defibrillators that can be found in airports, hotels, shopping centers, and corporate or government offices, among others.

Then, there’re implantable cardioverter defibrillators or ICDs. These units are implanted in the patient’s chest, and they may also perform the pacemaking function. ICDs constantly monitor the patient’s heart rhythm, and if needed, also correct an abnormal heart rhythm or arrhythmia according to the device’s programming. In the event of complex arrhythmias, such devices can be combined with a pacemaker.

Those are the different types and uses of a defibrillator. But although they are different in shape and size, all of them have a specific goal. That is to convert an unhealthy cardiac rhythm into a more normal rhythm. And whether, it is used by medical professionals or lay men, external or internal, automatic or manual, it helps lessen incidences of cardiac arrest or cardiac death.

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