CXR
ECG
CBC
Chem-7
BNP?
D-dimer?
Troponin?
ABG?
Bedside ultrasound?
Predominant A lines + lung sliding = Asthma/COPD
Multiple predominant B lines anteriorly with lung sliding = Pulmonary Edema
Normal anterior profile + DVT= PE
Anterior absent lung sliding + A lines + lung point = Pneumothorax (PTX)
Anterior alveolar consolidations, anterior diffuse B lines with abolished lung sliding, anterior asymmetric interstitial patterns, posterior consolidations or effusions with out anterior diffuse B lines = Pneumonia
Acute dyspnea
Pulmonary
Acute chest pain
Airway obstruction
Chest pain 
Anaphylaxis
Acute chest syndrome
Angioedema