1. Defibrillators
Kaarel Koovit

2. Fibrillation
The irregular, unsynchronized contraction of the muscle fibers.
In the heart ventricular fibrillation is a condition which can lead to asystole.
It is usually preceded by ventricular tachycardia (fast heart rhythm).

3. Fibrillation
Normal ECG VT
VT/VF VF

4. Defibrillation Common treatment to ventricular fibrillation
Consists of driving an electric shock to the cardiac cells.
When the cardiac cells are depolarized, the heart can attempt to restore the normal heart rhythm.

5. Defibrillation
The waveform of the shock can be mono- or biphasic.

6. Defibrillators
Device to transfer the electrical energy to the heart.

7. Defibrillators
Monophasic
Biphasic

8. Defibrillator types
External

9. Defibrillator types
Implantable

10. Electrodes

11. The future
Making defibrillators more reliable in environments of external noise.
Develop new algorithms to improve the detection of cardiac arrhythmias.
Increase the effectiveness and reduce harmful downside of the defibrillation waveforms applied .