Dyspnea and Fever

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Eiman Ghaffarpasand, M.D. [2]


Abbreviations: ABG (arterial blood gas); ACE (angiotensin converting enzyme); BMI (body mass index); CBC (complete blood count); CSF (cerebrospinal fluid); CXR (chest X-ray); ECG (electrocardiogram); FEF (forced expiratory flow rate); FEV1 (forced expiratory volume); FVC (forced vital capacity); JVD (jugular vein distention); MCV (mean corpuscular volume); Plt (platelet); RV (residual volume); SIADH (syndrome of inappropriate antidiuretic hormone); TSH (thyroid stimulating hormone); Vt (tidal volume); WBC (white blood cell);

Organ system Diseases Clinical manifestations Diagnosis Other features
Symptoms Physical exam
Loss of consciousness Agitation Weight loss Fever Chest pain Cough Cyanosis Clubbing JVD Peripheral edema Auscultation CBC ABG Imaging Spirometry Gold standard
Acute Dyspnea Respiratory system Head and Neck,

Upper airway

Anaphylaxis[1] +/- + - +/- - - +/- - - - Scattered wheezing Normal Normal Normal N/A Vital sign Type 1 hypersensitivity
Croup[2] - + - +/- - + + - - - Stridor WBC Normal Steeple sign Normal Physical exam Barking cough
Epiglottitis[3] - + - + - + - - - - Stridor WBC Normal Thumb sign Normal Laryngoscopy Drooling
Rhinosinusitis[4] - - - + - +/- - - - - Normal WBC Normal Air fluid level Normal Physical exam Headache
Chest and Pleura,

Lower airway

Bronchitis[5] - - - + + + - - - - Rhonchi  WBC Normal Normal Normal Physical exam Rhonchi relieved by cough
Bronchiolitis[6] - - - + +/- + - - - - Wheeze and Crackles WBC Normal Bronchovascular markings Vt Clinical assessment Respiratory syncytial virus (RSV)
COPD exacerbation[7] - + - + + + + +/- +/- +/- Wheeze, Rhonchi, and Crackles WBC, ↑RBC Respiratory alkalosis Hyperexpansion FEV1/FVC Clinical assessment Acute exacerbations of chronic bronchitis (AECB)
Pneumonia[8] - - - + + + - - - - Wheeze, Rhonchi, and Crackles WBC, neutrophilia Normal Lobar consolidation Normal Chest X-ray and CT Scan productive cough
Cardiovascular system Acute myocardial ischemia[9] +/- + - +/- + - - - - - Normal Normal Normal Normal Normal Cardiac troponin I Nausea and vomiting, Positive pertinent risk factors, such as hypertension, diabetes, and smoking
Pulmonary edema[10] +/- + - + + + + + + + Basal crackle Normal Respiratory alkalosis Bat wing pattern, air bronchograms Vt, ↑RV Cardiac Catheterization Tachypnea
Central nervous system Stroke + - - +/- - - - - - - Normal Normal Normal Intracranial infarct or hemorrhage Normal Brain MRI Paralysis or paresthesia
Encephalitis[11] + + - + - - - - - - Normal WBC, neutrophilia Normal Normal Normal CSF PCR Confusion
Toxic/Metabolic Organophosphate poisoning[12] + - - + - - - - - - Wheeze Normal O2, ↑CO2 Normal Normal Blood test Salivation, Lacrimation, Emesis, Miosis
Systemic Sepsis[13] +/- - - + - - - - - - Normal WBC, neutrophilia O2, ↑CO2 Normal Normal SIRS criteria Chills, Confusion
Organ system Diseases Clinical manifestations Diagnosis Other features
Symptoms Physical exam
Loss of consciousness Agitation Weight loss Fever Chest pain Cough Cyanosis Clubbing JVD Peripheral edema Auscultation CBC ABG Imaging Spirometry Gold standard
Chronic Dyspnea Respiratory system Chest and Pleura,

Lower airway

Bronchiectasis[5] - - - + + + + + - - Rhonchi, Wheezing, Crackles WBC, neutrophilia O2, ↑CO2 Tram-track opacities FEV1/FVC High resolution computed tomography (HRCT) Chronic productive cough
Alveolitis[14] - - - + + + - - - - Basal crackle WBC, neutrophilia Normal  Basal reticulonodular opacification   FEV1/FVC High resolution computed tomography (HRCT) Dry cough
Bronchiolitis obliterans[6] - - - + + + + + - - Expiratory wheeze WBC O2, ↑CO2 Hyperinflation, Reticulonodular opacities FEV1/FVC Lung biopsy Complication of allogeneic hematopoietic stem cell transplantation
Cystic fibrosis[15] - - + + - +/- + + - - Rhonchi, Wheezing, Crackles Normal Metabolic alkalosis Thick-walled bronchiectasis FEF75%/FVC Sweat test Absent vas deferens
Diaphragmatic paralysis[16] - - - +/- +/- +/- - - - - Normal Normal Normal Unilateral or bilateral diaphragmatic flattening Vt, ↑RV

(anatomical)

CXR confirmed by fluoroscopic sniff test Respiratory insufficiency
Tuberculosis[17] - - + + + + +/- - - - Rhonchi, Wheezing, Crackles WBC O2, ↑CO2 Patchy consolidation or poorly defined linear and nodular opacities Restrictive, obstructive, or mixed IFN-γ release assay (IGRA)

Acid-fast staining

Night sweat
Cardiovascular system Pericardial effusion[18] - - - +/- + + - - + - Muffled heart sounds Normal Normal Fluid density around the heart Normal M-mode and 2-dimensional Doppler echocardiography Hoarseness, Palpitation
Autoimmune Microscopic polyangiitis[19] - - +/- + + - - - - +/- Scattered wheezing WBC O2, ↑CO2 Normal Vt, ↑RV Histological confirmation Skin lesions, Nerve damage

References

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