Adrenal Insufficiency
Salicylate Toxicity
Anticholinergic Toxicity
Neuroleptic Malignant Syndrome
Malignant Hyperthermia
Thyrotoxicosis
Cardiogenic
Acute valvular Regurgitation/VSD
CHF
Dysrhythmia
ACS
Myocardial Contusion
Myocarditis
Drug toxicity (e.g. beta blocker, CCB, or bupropion OD)
Obstructive
Air embolism
Aortic Stenosis
Cardiac Tamponade
PE
Tension pneumothorax
Distributive
Adrenal crisis
Anaphylaxis
Neurogenic shock<unk> Toxicologic
Hypovolemic
Severe dehydration
Hemorrhagic shock (traumatic and non-traumatic)
Acute valvular Regurgitation/VSD
CHF
Dysrhythmia
ACS
Myocardial Contusion
Myocarditis
Drug toxicity (e.g. beta blocker, CCB, or bupropion OD)
Air embolism
Aortic Stenosis
Cardiac Tamponade
PE
Tension pneumothorax
Adrenal crisis
Anaphylaxis
Neurogenic shock<unk> Toxicologic
Severe dehydration
Hemorrhagic shock (traumatic and non-traumatic)
Sepsis 
Adrenal Insufficiency
Tumor lysis syndrome
Salicylate Toxicity
Hemorrhagic shock
Anticholinergic Toxicity
Toxic shock syndrome
Neuroleptic Malignant Syndrome