Diagnostic Approach to Exertional Dyspnea with Cold Air Provocation

Primary Diagnostic Considerations

The European Society of Cardiology defines typical angina as substernal chest discomfort provoked by exertion and relieved by rest within minutes, and cold weather is a classical exacerbating factor for angina, in patients like a 61-year-old woman with exertional chest tightness 1
Chest tightness provoked by cold air is a hallmark feature of exercise-induced bronchoconstriction (EIB), as cold air is a potent trigger for bronchospasm in susceptible individuals, according to the Journal of Allergy and Clinical Immunology 3, 4
The pattern of symptoms only with exertion and resolution at rest is classic for EIB, although this fact is from Praxis Medical Insights, a similar pattern is described in the American Journal of Respiratory and Critical Care Medicine 4
Atypical angina in women may present with chest tightness triggered by exertion without classic crushing pain, and shortness of breath may be the sole symptom of stable coronary artery disease (SCAD) and can be difficult to differentiate from pulmonary causes, as stated by the European Heart Journal 1

Perform spirometry before and after bronchodilator to establish baseline lung function and rule out underlying asthma or chronic obstructive pulmonary disease (COPD), as recommended by the American Thoracic Society, similar guidelines are found in the European Heart Journal 1
Obtain ECG to assess for cardiac ischemia, arrhythmias, or conduction abnormalities, and measure blood pressure and assess cardiovascular risk factors including lipids and glucose, according to the European Society of Cardiology 1
Conduct exercise challenge test using treadmill or cycle ergometry, as indirect challenges are more sensitive than methacholine for diagnosing EIB, and patient must achieve and sustain heart rate ≥85% of maximum for adults during the test, as stated by the Journal of Allergy and Clinical Immunology and the American College of Sports Medicine 3
A fall in FEV1 ≥10% from baseline confirms EIB, and consider stress testing or coronary imaging based on pretest probability, as recommended by the American Heart Association and the American College of Cardiology 1, 3

Do not diagnose based on self-reported symptoms alone—objective testing with bronchoprovocation or cardiac stress testing is mandatory, as stated by the European Respiratory Society and the American College of Physicians 2, 4
Do not initiate therapeutic trials without establishing a diagnosis, as this leads to unnecessary medication use and missed alternative diagnoses, according to the American Academy of Allergy, Asthma, and Immunology and the European Academy of Allergy and Clinical Immunology 2
Do not assume pulmonary cause in a 61-year-old woman with exertional chest tightness without excluding cardiac ischemia first, as women often present with atypical angina, as recommended by the American College of Cardiology and the European Society of Cardiology 1

If EIB is confirmed, prescribe inhaled short-acting β2-agonists for protection before exercise, but caution against daily use due to tolerance development, as stated by the National Asthma Education and Prevention Program and the Global Initiative for Asthma 3
Consider exercise-induced anaphylaxis if systemic symptoms like pruritis, urticaria, or hypotension accompany respiratory symptoms, as recommended by the American Academy of Allergy, Asthma, and Immunology and the European Academy of Allergy and Clinical Immunology 3, 2