Presentation about Defebrilator

1. DEFIBRILLATOR

2. WHAT IS DEFIBRILLATOR ?
Defibrillators are devices that restore a normal heartbeat by sending an electric pulse or shock to the
heart.
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.

3. ELECTRICAL ACTIVITY OF HEART
SA NODE
AV
NODE

4. PQRST WAVE
• P Wave: Atrial depolarization
• QRS Wave: Ventricular Depolarization
• T Wave: Ventricular Repolarization

5. TYPES OF DEFIBRILLATOR
1. External Defibrillator.
2. Implantable Cardioverter Defibrillator (ICD).
3. Wearable Cardioverter Defibrillator (WCD).

6. Wearable Cardioverter Defibrillator (WCD)
The wearable cardioverter-defibrillator (WCD) is a
rechargeable external device that can be worn under
the clothing all day long and protects the wearer from
potentially life-threatening ventricular arrhythmias.
When a dangerous arrhythmia is detected, the WCD
can deliver high-energy shocks.

7. Implantable Cardioverter Defibrillator (ICD)
An implantable cardioverter defibrillator (ICD) is a small
electronic device connected to the heart.
It is used to continuously monitor and help regulate potentially
fast and life-threatening electrical problems with the heart.

8. DIFFERENCE BETWEEN PACEMAKER & ICD
A pacemaker is a small, battery-operated device that helps
the heart beat in a regular rhythm.
An implantable cardiac defibrillator is a device that monitors
your heart rate and delivers a strong electrical shock to
restore the heartbeat to normal in the event of tachycardia.

9. EXTERNAL DEFIBRILLATOR
Device that restore a normal heartbeat by sending an electric
pulse or shock to the heart externally.

10. Working
 Energy storage capacitor is charged at relatively slow rate from AC line.
 Energy stored in capacitor is then delivered at a relatively rapid rate to chest of the patient.

12. PLACEMENT OF PADDLES

13. DEXTROCARDIA

14. Types of Defibrillator electrodes
 Spoon shaped electrode
Applied directly to the heart
 Paddle type electrode
Applied against the chest wall
 Pad type electrode
Applied directly on chest wall

15. TYPES
 Monophasic:
A monophasic waveform delivers electrical shocks in a single direction from one electrode to another.
 Biphasic:
With a biphasic shock, the current travels in two phases. In the first phase, the current runs from the
first electrode to the second electrode via the patient’s heart. Then, the current reverses direction and
runs from the second electrode back to the first via the heart.

16. Cont….

17. MODES
Manual Mode
 No ECG Leads
 Need to Select Energy
Energy Selection Criteria
2 joule Per Kg
For example: if a patient is of 50 kg, then the first shock will be of 100J.

18. MODES
Synchronized Mode
 Synchronized with ECG.
 Need to select energy
 ECG electrodes must be attached.
 Defibrillator delivers shock at R peak of ECG wave.

19. MODES
AED Mode
 Disposable Paddles are placed on Patient’s Body.
 ECG electrodes are attached in this mode.
 No need to select energy.
 Just do as per Defibrillator commands.

20. Safe Handling
 Power Cable must be connected all the time but during defibrillation procedure, it should be
disconnected.
 Apply gel before placing electrodes on skin.
 Clean gel after every procedure.
 During procedure, make sure that there is not any jewelery, mobile phone or any electrical wire near
patient.

21. THANK YOU!
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