AEDs are automatic external defibrillators which give instructions to lay operators; can be used by lay public for resuscitating a person in cardiac arrest.
Elective electrical cardioversion for AF /AFL: is often done in conditions in which the atrial booster function is needed as in hypertrophic cardiomyopathy.
Long QT syndromes are a group of inherited arrhythmogenic disorders characterised by prolonged QT interval and life threatening ventricular arrhythmias.