<unk> , it is possible to observe by invasive blood pressure (red) the transition from a normal mechanical<unk>  of the heart, which progressively changes in rhythm and contractile quality to asystole, even in the presence of normal electrical<unk>  (green), also confirmed by the pulse oximeter detection even if with artifacts (blue) The absence of a pulse confirms a clinical diagnosis of cardiac arrest, but<unk>  can only be distinguished from other causes of cardiac arrest with a device capable of electrocardiography (ECG/EKG). In<unk> , there is organised or semi-organised electrical<unk>  in the heart as opposed to asystole (flatline) or to the disorganised electrical<unk>  of either ventricular fibrillation or ventricular tachycardia.
Pulseless electrical activity
Electrical alternans
Ventricular escape beat
Hyperdynamic precordium
High frequency QRS
Infradian rhythm
Junctional escape beat
Pulsus alternans