DEFIBRILLATOR basics to advanced concepts in quick review
- 2. 03
- 3. 03
- 4. An act or process of forming fibers or fibrils. 02 Fibrillations
- 5. Defibrillators are devices that restore a normal heartbeat by sending an electric pulse or shock to the heart. 02
- 6. Fibrillation is the rapid, irregular, and unsynchronized contraction of muscle fibers. 02
- 7. They are used to prevent or correct an arrhythmia, a heartbeat that is uneven or that is too slow or too fast. Defibrillators can also restore the heart's beating if the heart suddenly stops. 04 Defibrillators
- 8. Principle of Defibrillators A defibrillator is a device that delivers a direct electrical current across the myocardium to cause synchronous depolarization of the cardiac muscle, with the aim of converting dysrhythmia into normal sinus rhythm. It is used to treat ventricular fibrillation (VF), which is one of the main causes of sudden death.
- 9. V-fib or VF is an abnormal heart rhythm in which the ventricles of the heart quiver (tremble or shake with a slight rapid motion.) instead of pumping normally. It is due to disorganized electrical activity. Ventricular fibrillation
- 11. Causes of Ventricular fibrillation Insufficient blood flow to the heart muscle Damage to the heart muscle (from a heart attack. Cardiomyopathy (is a disease of the heart muscle that makes it harder) Problems with the aorta Drug toxicity Sepsis (severe body infection)
- 12. During atrial fibrillation, the heart's two upper chambers (the atria) beat chaotically (Confusion) and irregularly — out of coordination with the two lower chambers (the ventricles) of the heart. Atrial fibrillation symptoms often include heart palpitations, shortness of breath and Atrial fibrillation
- 14. 06 Automated external defibrillators (AEDs) TYPE S implantable cardioverter defibrillators (ICDs) Wearable Cardioverter Defibrillators (WCDs),
- 15. 07 TYPE S Automated external defibrillators (AEDs), which are in many public spaces, were developed to save the lives of people experiencing sudden cardiac arrest. Even untrained bystanders can use these devices in an
- 16. TYPES Other defibrillators can prevent sudden death among people who have a high risk of a life-threatening arrhythmia. They include implantable cardioverter defibrillators (ICDs), which are surgically placed inside your body, and wearable cardioverter defibrillators (WCDs), which rest on the body. It can take time and effort to get used to living with a defibrillator, and it is important to be aware of possible risks and complications.
- 17. 08
- 18. 08 AED s An AED is a lightweight, battery-operated, portable device that checks the heart’s rhythm and sends a shock to the heart to restore a normal rhythm. The device is used to help people having a sudden cardiac arrest. Sticky pads with sensors, called electrodes, are attached to the chest of someone who is having a cardiac arrest. The electrodes send information about the person's heart rhythm to a computer in the AED. The computer analyzes the heart rhythm to find out whether an electric shock is needed. If needed, the electrodes deliver the shock.
- 19. 08 ICDs are placed surgically in the chest or abdomen, where it checks for arrhythmias. Arrhythmias can interrupt the flow of blood from your heart to the rest of your body or cause your heart to stop. The ICD sends a shock to correct the arrhythmia. An ICD can give off a low-energy shock to speed up or slow down an abnormal heart rate or a high-energy shock, which can correct a fast or irregular heartbeat. If the low-energy shocks do not restore your normal heart rhythm, the device will switch to high-energy shocks for defibrillation. The device also will switch to high-energy shocks if your ventricles start to quiver rather than contract strongly. ICDs are similar to pacemakers, but pacemakers deliver only low-energy electrical shocks. Implantable Cardioverter Defibrillators
- 20. ICDs ICDs have a generator connected to wires to detect your heart’s pulses and deliver a shock when needed. Some models have wires that rest in one or two chambers of the heart. Others do not have wires threaded into the heart chambers but rest on the heart to monitor its rhythm. The ICD can also record the heart's electrical activity and heart rhythms. The recordings can help your doctor fine-tune the programming of your device so it works better to correct irregular heartbeats. Your device will be programmed to respond to the type of arrhythmia you are most likely to
- 21. 08
- 22. WCDs have sensors that attach to the skin. They are connected by wires to a unit that checks your heart’s rhythm and delivers shocks when needed. Like an ICD, the WCD can deliver low- and high- energy shocks. The device has a belt attached to a vest and is worn under your clothes. Your doctor will fit the device to your size. The device is programmed to detect a particular heart Wearable Cardioverter Defibrillators (WCDs),
- 23. The sensors detect when an arrhythmia occurs and notifies you with an alert. You can turn off the alert to prevent a shock if not needed, but if you do not respond, the device will administer a shock to correct the rhythm. Typically, this happens within one minute. The device can deliver repeated shocks during an episode. After each episode, the sensors Wearable Cardioverter Defibrillators (WCDs),
- 24. 08
- 25. Defibrillators can be used in children, teens, and adults. AEDs are used to treat sudden cardiac arrest. Your doctor may recommend an ICD or WCD to treat arrhythmia and prevent new or repeat sudden cardiac arrests.
- 27. 11 Monophasic AEDs are devices that emit a type of shock. It sends an electrical current in a single direction from an electrode on one side of the chest to an electrode on the other side.
- 28. 11 Unlike conventional monophasic defibrillators, biphasic defibrillators deliver current in two directions. In the first phase, the current moves from one paddle to the other as with monophasic defibrillators. During the second phase, the
- 30. 01/03/2025
- 31. Typically, biphasic defibrillation begins at 120 joules, with the level increased as needed Typically when 360 Joules are delivered for defibrillation in a monophasic
- 32. 25