Heart Defibrillator

AEDs Guide The User With Instructions

Various Forms and Uses of a Defibrillator

A defibrillator plays a very important role in the field of medicine. It is used to restore a normal heart rhythm through sending an electrical shock to the heart when heartbeat becomes dangerously fast due to ventricular fibrillation or ventricular tachycardia. Both conditions may be life-threatening, and could lead to cardiac arrest, and even cardiac death. Other conditions that require defibrillation are long QT syndrome, cardiomyopathy, and arrhythmogenic right ventricular dysplasia and survivors of sudden cardiac death.

Defibrillation is the ultimate treatment for life-threatening cardiac arrhythmias ventricular fibrillation and pulseless ventricular tachycardia. To deliver a therapeutic jolt of electrical energy to the affected heart, a defibrillator is used. Such treatment restores normal heart rhythms before cardiac arrest occurs. It works by depolarizing a critical mass of the heart muscle, stopping the arrhythmia, and reestablishing 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.

There’re two types of manual defibrillators: external and internal. External units work together with electrocardiogram readers. Through the device, the clinician can diagnose a cardiac condition, decide on the right amount of charge in joules, and send the shock through pads or paddles. However, such process necessitates thorough medical knowledge and experience. Because of that, you can only see these units in hospitals and some ambulances, generally.

Manual internal defibrillators are just about identical to the external version. The difference is that the charge is delivered through internal leads attached to the heart. The leads are used to detect when the heart is experiencing a rhythm that demands a shock, and to deliver the shock. Generally, you can find these units exclusively in operating rooms, where the chest is likely to be open, or can be quickly opened by a surgeon.

REVIEW ARTICLE: Current Concepts: Implantable Cardioverter-Defibrillators after Myocardial Infarction (New England Journal of Medicine)REVIEW ARTICLE: Current Concepts: Implantable Cardioverter-Defibrillators after Myocardial Infarction (New England Journal of Medicine)
Patients with a history of myocardial infarction and a reduced ejection fraction are at increased risk for life-threatening ventricular arrhythmias. Which of these patients are the most appropriate candidates for implantable cardioverter-defibrillator (ICD) therapy is unclear. Factors influencing the decision are discussed.

Automated external defibrillators are available for emergency purposes. They are preprogrammed units using computer technology that are designed to analyze the heart rhythm and advise whether a shock is required. Lay persons can operate AEDs with minimal training. They are either PADs or public access defibrillators and can be found in corporate or government offices, hotels, airports and shopping centers. Or, they could be held by skilled personnel who will attend incidents.

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.

A defibrillator can come in various forms and uses. However, no matter how different they are in shape and size, they all aim to restore an unhealthy cardiac rhythm into a more normal rhythm. So, whether it’s automatic or manual, internal or external, or used only by medical professionals or lay men, it plays a significant role in saving lives of people.

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When there is any cardiac arrest, a device called defibrillator is used to give electrical energy to the heart to release it from the arrest. With the advancement in the technology automatic defibrillator leads are developed and fitted ...

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