Asthma
Asthma involves variable respiratory symptoms and expiratory airflow limitation related to airway inflammation and hyperresponsiveness. Patterns vary across patients and over time.
Open interactive lesson & self-check ↗Asthma — learning map
Original conceptual SVG · scalableOriginal schematic relationship map for this topic; relationships are organized for study, not intended as an anatomical depiction or a diagnostic algorithm.
Airway processes
Bronchoconstriction, airway-wall swelling and mucus can narrow airway lumen and impair airflow.
Variable symptoms
Wheeze, breathlessness, chest tightness and cough can fluctuate with exposure, exercise, infection and time of day.
Objective assessment
Spirometry and other tests, interpreted in clinical context, may demonstrate variable expiratory airflow limitation.
Risk and follow-up
Exacerbation history, lung function, inhaler technique and environmental factors contribute to assessing control and future risk.
Reference and next reading
Explore the original curriculum and publisher-hosted resources for full-depth reading; this note is an original schematic introduction, not an exhaustive chapter.