Transcript Defibrillators

Defibrillators
Kaarel Koovit
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).
Fibrillation
•
Normal ECG
•
VT
•
VT/VF
•
VF
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.
Defibrillation
• The waveform of the shock can be mono- or biphasic.
Defibrillators
• Device to transfer the electrical energy to the
heart.
Defibrillators
• Monophasic
• Biphasic
Defibrillator types
• External
Defibrillator types
• Implantable
Electrodes
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 .