Material presented here is for informational purposes only & is not a substitute for formal ACLS training, nor is it intended as advice or directions for delivering medical treatment. Established practices at your institution may vary from the information presented  here.
The algorithms basically are in terms of too fast, too slow, and dead rhythms and continuing with the stroke and acute coronary syndromes as well.
We will take the approach with all Algorithms of an unconsious patient as the BLS: CABD and if patient is conscious Primary (ABCDE) and Secondary (5Hs and 5Ts) surveys.
If patient is unconscious BLS (Basic Life Support):
C=Check for responsiveness and no breathing or abnormal breathing and Call code blue or
     9-1-1 and Check Circulation (no more than 10 seconds) - If definite pulse not felt. Begin
     Chest compressions for pulseless patient - hard and fast 100 - 120 beats per minutes,
     30 compressions
A=Airway, Open airway using head - tilt - chin lift (if no trauma suspected)
B=Breathing, Breath for pt - 2 breaths - (each breath should cause chest rise - but wait no more
     than 10 seconds)
5 cycles (2 minutes) then

D=Defibrillation, Check for and tx a shockable rhythm (V.fib/V.tach are the only two shockable rhythms, see Unstable Tachycardias for Cardioversion options (120-200Joules for biphasic defibrillators and 360J for monophasic defibrillators)
C=Circulation - After shock - resume CPR with chest compresions and when advanced personnel arrive:
This moves into ACLS, place (intravenous device) IV. Antecubital vein is 1st choice/IO (intraosseous) route is an accepatible alternative and give medications (Vasopressors) - CPR for 5 cycles/2 minutes - meds (Antiarrhythmics)

Primary Assessment:

Secondary Assessment:
SAMPLE=Signs and Symptoms, Allergies, Medications, Past medical history, Last meal eaten, Events (what happened) -  look for 5 Hs and 5 Ts: Hypovolemia, Hypoxia, Hydrogen Ion (Acidosis), Hypo/hyperkalemia (low or high K level), Hypothermia, & Tension Pneumothorax, Tamponade-cardiac, Toxins (overdose - see PEA for tx), Thrombosis-pulmonary (Pulmonary Embolism-PE), Thrombosis-cardiac (Myocardial Infarction-MI).




Acute Coronary Syndromes

Acute Ischemic Stroke


Unstable Tachycardias

Tachycardias (narrow QRS complex)

Tachycardias (wide QRS complex)

Respiratory Arrest

V. Fib/Pulseless V. Tach. treated with Automated
    External Difibrillator (AED)

Refractory V. Fib/Pulseless V. Tach

Pulseless Electrical Activity (PEA)

God   Knows
God   Knows