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Definition of Cardiac Arrest
An abrupt loss of cardiac pump function which may be reversible by a prompt intervention, but will lead to death in its absence.
Cardiac arrest may result from 1 of 4 mechanisms-
1)Ventricular fibrillation.
2)Pulseless ventricular tachycardia.
3)Ventricular asystole.
4)Pulseless electrical activity.
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Causes of Cardiac Arrest
- Ventricular fibrillation
–Myocardial ischemia or infarction.
-Electrocution.
-Hypokalemia & hyperkaliemia.
-Drugs.
- Ventricular asystole
-Localized failure of conducting tissue.
-Massive myocardial infarction.
- Pulseless electrical activity
-Cardiac rupture.
-Massive pulmonary embolism.
Management of Cardiac Arrest
Cardiopulmonary resuscitation (CPR)
Provides artificial ventilation & perfusion to vital organs i.e. heart & brain until spontaneous cardiopulmonary function is restored.
It encompasses both basic life support & advanced life support.
1)Basic life support (BLS)
Indicates maneuvers which, without special equipment either prevent circulatory & respiratory arrest or externally support circulation & ventilation of victim in arrest:-
i) Airway
ii) Breathing
iii) Circulation
iv) Defibrillation.
2)Advanced life support (ACLS)
Consists of basic life support & use of special equipment & drugs for establishing & maintaining effective ventilation & circulation :-
i) Advanced airway.
ii) Advanced breathing.
iii) Advanced circulation.