Pulmonary
Airway obstruction
Anaphylaxis
Angioedema
Aspiration
Asthma
Cor pulmonale
Inhalation exposure
Noncardiogenic pulmonary edema
Pneumonia
Pneumocystis Pneumonia (PCP)
Pulmonary embolism
Pulmonary hypertension
Tension pneumothorax
Idiopathic pulmonary fibrosis acute exacerbation
Cystic fibrosis exacerbation
Cardiac
Cardiac tamponade
Cardiogenic pulmonary edema (CHF)
Myocardial Infarction
Pericarditis
Myocarditis
Other Associated with Normal/↑ Respiratory Effort
Abdominal distension
Anemia
CO Poisoning
Salicylate toxicity
Diabetic ketoacidosis (DKA)
Diaphragm injury
Electrolyte abnormalities
Epiglottitis
Flail chest
Hypotension
Metabolic acidosis
Pneumonia
Pneumothorax/hemothorax
Renal Failure
Sepsis
Toxic ingestion
Other Associated with ↓ Respiratory Effort
Guillain-Barre syndrome
Multiple sclerosis
Myasthenia Gravis
Lambert-Eaton Syndrome
Organophosphate toxicity
Stroke (Main)
Tick<unk> ralysis
Airway obstruction
Anaphylaxis
Angioedema
Aspiration
Asthma
Cor pulmonale
Inhalation exposure
Noncardiogenic pulmonary edema
Pneumonia
Pneumocystis Pneumonia (PCP)
Pulmonary embolism
Pulmonary hypertension
Tension pneumothorax
Idiopathic pulmonary fibrosis acute exacerbation
Cystic fibrosis exacerbation
Cardiac tamponade
Cardiogenic pulmonary edema (CHF)
Myocardial Infarction
Pericarditis
Myocarditis
Abdominal distension
Anemia
CO Poisoning
Salicylate toxicity
Diabetic ketoacidosis (DKA)
Diaphragm injury
Electrolyte abnormalities
Epiglottitis
Flail chest
Hypotension
Metabolic acidosis
Pneumonia
Pneumothorax/hemothorax
Renal Failure
Sepsis
Toxic ingestion
Guillain-Barre syndrome
Multiple sclerosis
Myasthenia Gravis
Lambert-Eaton Syndrome
Organophosphate toxicity
Stroke (Main)
Tick<unk> ralysis
ALS
Ascites
Uncorrected ASD
Congenital heart disease
COPD exacerbation
Fever
Hyperventilation
Interstitial lung disease
Neoplasm
Obesity<unk> 
Pleural effusion
Polymyositis
Porphyria
Pregnancy
Rib fracture
Spontaneous pneumothorax
Thyroid Disease
URI
Panic attack
Pulmonary
Heat syncope
Airway obstruction
Heat stroke
Anaphylaxis
Electrical storm
Angioedema