Breathlessness history

Reading File

Finding Sources

Reading File

Finding Sources

Based on the library search, there isn't a single dedicated "breathlessness history-taking" chapter, but the textbooks provide rich content on this topic. Here is a comprehensive clinical framework for taking a history of breathlessness, synthesised from the available sources:

Taking a History of Breathlessness (Dyspnoea)

Definition

Dyspnoea is a subjective sensation of difficulty breathing — frequently described by patients as "shortness of breath." Under normal conditions, breathing is imperceptible. When sufficiently intense, respiratory effort results in dyspnoea, which may occur at rest in significant cardiopulmonary disease. — Fishman's Pulmonary Diseases and Disorders

1. Characterise the Symptom (SOCRATES)

Feature	Key Questions
Site/Nature	Where do they feel it? Chest tightness, air hunger, increased effort, inability to get a full breath?
Onset	Sudden or gradual? First episode or recurrent?
Character	Air hunger (hypercapnia/hypoxia-driven) vs. sense of excessive effort (e.g., airway obstruction)?
Radiation	Any associated chest pain — pleuritic, central, positional?
Timing	Constant vs. episodic? Diurnal variation? Nocturnal?
Exacerbating / Relieving	Exercise, posture (orthopnoea, platypnoea), cold air, allergens, medications?
Severity	At rest, on exertion? How far can they walk on the flat? Can they climb stairs?

2. Severity — Functional Grading

Ask about exercise tolerance to grade severity:

MRC Dyspnoea Scale (Grade 1–5): from "breathless on strenuous exercise" to "too breathless to leave the house or dress"
NYHA Classification (I–IV) for cardiac causes

3. Associated Symptoms — Systematic Screen

Respiratory

Cough (productive or dry), haemoptysis, wheeze, stridor
Sputum: colour, volume, consistency
Chest pain — pleuritic (sharp, worse on inspiration → pneumothorax, PE, pleuritis), central (cardiac)

Cardiovascular

Orthopnoea (breathless lying flat → LVF, cardiac tamponade, bilateral diaphragm palsy)
Paroxysmal nocturnal dyspnoea (PND) → left heart failure
Ankle swelling / oedema → heart failure, cor pulmonale
Palpitations → arrhythmia (AF precipitating pulmonary oedema)

Systemic

Fever, night sweats, weight loss → malignancy, TB, chronic infection
Fatigue and pallor → anaemia
Voice change / hoarseness → recurrent laryngeal nerve palsy (lung cancer, aortic aneurysm)
Muscle weakness → neuromuscular cause (MND, Guillain-Barré, myasthenia)

4. Timing Patterns and Their Differential Significance

Pattern	Likely Causes
Sudden onset	Pneumothorax, pulmonary embolism, acute severe asthma, anaphylaxis, inhaled foreign body
Minutes to hours	Acute LVF/pulmonary oedema, exacerbation of asthma or COPD
Days to weeks	Pneumonia, pleural effusion, pericardial effusion, cardiac tamponade
Months to years	COPD, pulmonary fibrosis, pulmonary hypertension, malignancy, anaemia
Episodic	Asthma, cardiac arrhythmia, pulmonary oedema, vocal cord dysfunction
Nocturnal / orthopnoea	LVF, COPD, obesity hypoventilation, obstructive sleep apnoea

5. Risk Factors and Past Medical History

Smoking history (pack-years) → COPD, lung cancer, IHD
Occupational/environmental exposure: asbestos, silica, birds, mouldy hay → fibrosis, pneumoconiosis, extrinsic allergic alveolitis
Atopy / allergy history → asthma, allergic bronchopulmonary aspergillosis
Cardiac history: IHD, valvular disease, hypertension, previous MI → heart failure
DVT/PE history, recent long-haul travel, immobility, malignancy → pulmonary embolism
Autoimmune disease (RA, SLE, scleroderma) → pulmonary fibrosis, pulmonary hypertension
Previous malignancy → metastatic disease, lymphangitis carcinomatosa, pleural effusion

6. Drug and Medication History

Drugs that can cause dyspnoea:

Beta-blockers → bronchospasm (especially in asthma/COPD)
Amiodarone → pulmonary toxicity / fibrosis
Methotrexate, nitrofurantoin, bleomycin → pulmonary fibrosis
NSAIDs → aspirin-exacerbated respiratory disease
ACE inhibitors → cough (which can be confused with or worsen breathlessness)

7. Social History

Smoking (current, ex, never; pack-years)
Occupational history — current and previous jobs, specific exposures
Pets (birds → hypersensitivity pneumonitis)
Home environment (damp, mould)
Exercise tolerance compared to peers — establishes baseline
Impact on daily activities, work, sleep

8. Family History

Asthma, atopy, COPD, cystic fibrosis
Alpha-1 antitrypsin deficiency (early emphysema, liver disease)
Pulmonary arterial hypertension (heritable form)

9. Two Mechanistic Types of Dyspnoea to Distinguish

According to Fishman's Pulmonary Diseases, two distinct types are recognised with different pathophysiology:

Air hunger — driven by chemoreceptor stimulation (hypercapnia, hypoxia); associated with breath-holding experiments and increased chemical drive
Sense of excessive effort — occurs when pressures required for breathing increase (e.g., obstructive or restrictive disease, respiratory muscle weakness)

The corollary discharge hypothesis proposes that dyspnoea arises from a mismatch between central respiratory motor output and the ventilation actually achieved — explaining why dyspnoea is profound in airway obstruction (high drive, low ventilation) but tolerable during exercise in healthy individuals.

10. Red Flags Requiring Urgent Assessment

Sudden onset at rest
Inability to complete full sentences
Cyanosis, oxygen saturations <92%
Haemoptysis
Associated syncope or pre-syncope
Stridor (upper airway obstruction)
Fever + productive cough + pleuritic pain (pneumonia/empyema)

Sources: Fishman's Pulmonary Diseases and Disorders; Goldman-Cecil Medicine; Morgan & Mikhail's Clinical Anesthesiology; Textbook of Family Medicine

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