Defibrillation is a technique used in emergency medicine to terminate ventricular fibrillation or pulseless ventricular tachycardia. It uses an electrical shock to reset the electrical state of the heart so that it may beat to a rhythm controlled by its own natural pacemaker cells.It is not effective for asystole (complete cessation of cardiac activity, more commonly known as "flatline") and pulseless electrical activity (PEA).
The purpose of defibrillation of ventricular arrhythmias is to apply a controlled electrical shock to the heart, which leads to depolarization of the entire electrical conduction system of the heart.
A defibrillator is a device that gives a high energy electric shock to the heart of someone who is in cardiac arrest.This high energy shock is called defibrillation, and it's an essential part in trying to save the life of someone who’s in cardiac arrest.
4. Difference between Defibrillator and Pacemaker?
A pacemaker is a small device that helps the heart beat at a regular rhythm and rate. The doctor places the pacemaker inside the body (implantation) during a surgical procedure.
A defibrillator (implantable cardioverter defibrillator, or ICD) is similar to a pacemaker, but it sends electrical shocks to the heart if the heart stops beating or beats in a disorganized way (chaotically). A defibrillator is also placed inside the body during a surgical procedure.
5. Why do we need more defibrillators?
To help someone who is in cardiac arrest effectively, a defibrillator needs to be found as quickly as possible. For every minute it takes for the defibrillator to reach someone and deliver a shock, their chances of survival reduce by up to 10%.
6. Who can use a defibrillator?
You don’t need to be trained to use a defibrillator – anyone can use it. There are clear instructions on how to attach the defibrillator pads. It then assesses the heart rhythm and will only instruct you to deliver a shock if it’s needed.
In a recent survey, three quarters of people said they wouldn’t feel confident enough to act if they saw someone having a cardiac arrest. With more CPR training and greater awareness, we can change that.
7. When you need an Defibrillator?
If you have ventricu-lar fibrillation (VF), you will need an ICD. That's when the lower chambers of the heart aren't contracting hard enough to pump blood throughout the body, causing heart arrest. If you have already suffered from cardiac arrest, from VF or another cause, you also need one.
If you don't have a history of these issues but are at increased risk due to a heart attack or another form of heart disease, you may need an echocardiogram to measure the pumping capacity of your heart or the fraction of your ejection. If the ejection fraction is below 35 or 30 %, depending on whether you had a previous heart attack, you probably need an ICD.
8. What is Automated External Defrillator?
An automated external defibrillator (AED) is a lightweight, portable device that delivers an electric shock through the chest to the heart.The shock can potentially stop an irregular heart beat (arrhythmia) and allow a normal rhythm to resume following sudden cardiac arrest (SCA). SCA occurs when the heart malfunctions and stops beating unexpectedly. If not treated within minutes, it quickly leads to death.
9.How do I use a defibrillator/AED?
You can use an AED with no training. The machine analyses someone’s heart rhythm and then uses visual or voice prompts to guide you through each step.
• First, make sure someone has called for an ambulance, and, if an AED isn’t immediately available, give CPR (cardiopulmonary resuscitation) until someone can bring you an AED.
• As soon as you’ve got an AED, switch it on. It will immediately start to give you a series of visual and verbal prompts informing you of what you need to do. Follow these prompts until the ambulance arrives or someone with more experience than you takes over.
• Take the pads out of the sealed pack. Remove or cut through any clothing and wipe away any sweat from the chest
• Remove the backing paper and attach the pads to their chest
• Place the first pad on their upper right side, just below their collarbone as shown on the pad
• Then place the second pad on their left side, just below the armpit. Make sure you position the pad lengthways, with the long side in line with the length of the their body
• Once you’ve done this, the AED will start checking the heart rhythm. Make sure that no-one is touching the person. Continue to follow the voice and/or visual prompts that the machine gives you until help arrives.
10. Why are AEDs important?
AEDs make it possible for more people to respond to a medical emergency where defibrillation is required. Because AEDs are portable, they can be used by nonmedical people (lay-rescuers). They can be made part of emergency response programs that also include rapid use of 9-1-1 and prompt delivery of cardio pulmonary resuscitation (CPR). All three of these activities are vital to improving survival from SCA.
11. Top manufactures and supplier of Defibrillator?