Cardiorespiratory physiotherapy is one of the three largest domains on the CPTE Written section, and it carries significant weight in the Oral stations as well — particularly questions about exercise prescription safety, oxygen monitoring, and knowing when to stop a session. For many IEPTs, it is also the domain most likely to contain terminology and protocols that differ from their country of training.
This guide covers what Canadian examiners consistently test, organized around the clinical reasoning framework the CPTE rewards. Sources used include Canadian Cardiovascular Society guidelines, Canadian Thoracic Society guidelines, and the Canadian Stroke Best Practice Recommendations.
The assessment framework — the foundation everything else sits on
Before selecting any intervention, you need to assess. CPTE scenarios frequently give you a patient presentation and ask what your assessment would prioritize. The standard cardiorespiratory assessment framework:
Subjective history: dyspnea (scale it — the Modified Borg Dyspnea Scale or the MRC Dyspnea Scale), exercise tolerance (how far can the patient walk before stopping?), orthopnea, PND (paroxysmal nocturnal dyspnea), peripheral edema, cough character, sputum production, and cardiac symptoms (chest pain, palpitations, syncope).
Objective — inspection: respiratory rate, breathing pattern (use of accessory muscles, pursed-lip breathing, barrel chest), cyanosis (central vs peripheral), digital clubbing, peripheral edema, jugular venous distension (JVD).
Objective — auscultation: normal breath sounds vs abnormal sounds. Crackles (fluid in alveoli — pulmonary edema, pneumonia, fibrosis); wheeze (airflow obstruction — asthma, COPD); rhonchi (secretions in larger airways — bronchiectasis, COPD exacerbation); absent or diminished sounds (pleural effusion, pneumothorax, severe hyperinflation).
Objective — vital signs: SpO₂ (normal ≥95%; watch for desaturation with exertion), respiratory rate (normal adult 12–20 breaths/min), heart rate, blood pressure, and temperature if indicated.
Objective — exercise testing: the 6-Minute Walk Test (6MWT) is the most commonly referenced functional test in Canadian cardiorespiratory PT. Know its normal values and the minimal clinically important difference (MCID): approximately 30 metres for COPD, and approximately 30–50 metres for heart failure (values vary by study — use a range in practice).
COPD — the highest-yield respiratory condition
Chronic obstructive pulmonary disease is the most commonly tested respiratory condition on the CPTE. COPD is classified using the GOLD framework — Grades 1 through 4 based on FEV₁ as a percentage of predicted, combined with symptom burden (CAT score) and exacerbation history.
Key physiotherapy facts:
- Pulmonary rehabilitation is the single most evidence-based non-pharmacological intervention for COPD — it improves exercise capacity, dyspnea, and quality of life, and reduces hospitalizations (Canadian Thoracic Society guidelines)
- Exercise prescription: start below symptom threshold, typically RPE 4–6/10 (Modified Borg). Use interval training if continuous exercise is not tolerated initially
- Breathing techniques: pursed-lip breathing slows respiratory rate, prolongs exhalation, and reduces air trapping. Diaphragmatic breathing increases efficiency of the diaphragm
- Airway clearance: active cycle of breathing technique (ACBT) and autogenic drainage are first-line for secretion clearance
- Oxygen: supplemental O₂ is used during exercise when SpO₂ drops below 88%. Maintaining SpO₂ ≥90% allows for higher exercise intensity and training effect
What CPTE scenarios test: distinguishing appropriate exercise intensity in COPD, recognizing when SpO₂ warrants stopping exercise, and selecting airway clearance techniques for different secretion profiles.
Heart failure — the exercise prescription danger zone
Heart failure with reduced ejection fraction (HFrEF) and heart failure with preserved ejection fraction (HFpEF) both appear on the CPTE, usually in the context of exercise prescription safety.
Key physiotherapy facts:
- Exercise is recommended for stable heart failure — the HF-ACTION trial demonstrated that supervised exercise training reduces hospitalizations and improves quality of life
- Beta-blockers blunt the heart rate response to exercise. Use RPE (Borg 6–20; target 11–13) rather than heart rate–based targets for exercise intensity prescription
- Resistance training at moderate intensity is safe and beneficial in stable HFrEF (ACC/AHA guidelines)
- Exercise stop criteria: chest pain, dyspnea >5/10, SpO₂ drop >4% or below 90%, diastolic BP >110 mmHg, any arrhythmia, patient request to stop
Red flag distinguisher: worsening orthopnea, new peripheral edema, and sudden weight gain (>2 kg over 2 days) are signs of heart failure decompensation. Exercise is contraindicated until medically stabilized.
Cardiac rehabilitation — the structured program you should understand inside out
Post-MI, post-CABG, and post-cardiac surgery patients routinely appear in CPTE cases. Cardiac rehabilitation in Canada is a structured, supervised exercise and education program with four phases:
- Phase I (in-hospital): early mobilization 24–48 hours post-event if medically stable. Ambulation, low-level ADLs, patient education
- Phase II (early outpatient, 4–12 weeks): supervised exercise, risk factor management, education on medications, diet, return to activities
- Phase III (maintenance): ongoing supervised exercise program
- Phase IV (independent): self-managed, community-based exercise
Post-CABG–specific precautions: sternal precautions for 6–8 weeks (no lifting >4.5 kg, no pushing/pulling with arms, no driving). Weight-bearing through arms only as tolerated. The sternal wire precautions protect the healing sternotomy.
Asthma — distinguishing exercise-induced from chronic
Key physiotherapy facts:
- Exercise-induced bronchoconstriction (EIB) peaks 5–15 minutes after stopping exercise and typically resolves within 30–60 minutes
- Trigger avoidance (cold air, allergens), warm-up exercise, and nasal breathing can reduce EIB frequency
- Chest physiotherapy role in asthma: primarily education, breathing retraining, and exercise prescription. Forced expiratory techniques during attacks are contraindicated (risk of bronchoconstriction)
- For the CPTE: distinguish asthma (typically reversible, episodic, often younger patients) from COPD (progressive, irreversible, older, usually smoker)
Pulmonary rehabilitation outcomes — the measures that matter
The CPTE expects you to select appropriate outcome measures and interpret results. The most commonly tested measures:
- 6MWT — Exercise capacity; MCID ~30m (COPD)
- COPD Assessment Test (CAT) — Health status; 0–40 scale; MCID 2 points
- Modified Borg Dyspnea Scale — Exertional dyspnea, 0–10
- MRC Dyspnea Scale — Functional breathlessness in ADLs, 1–5
- St George's Respiratory Questionnaire (SGRQ) — Quality of life; MCID 4 points
Exercise stop criteria — know these without hesitation
Stopping exercise is a tested decision point in both the Written and Oral sections. Universal stop criteria for cardiorespiratory patients:
- Chest pain or pressure
- Dyspnea disproportionate to exertion
- SpO₂ <88% (or a drop of >4% from baseline)
- HR exceeding the prescribed target or dropping unexpectedly
- Sustained arrhythmia
- Systolic BP >180 mmHg or diastolic BP >110 mmHg during exercise
- Dizziness, pallor, cyanosis, or patient distress
The exam pattern: a scenario mid-exercise session presents one of these signs. The correct answer is always to stop exercise first, then assess and escalate as needed. Continuing at lower intensity is never the correct answer when a hard stop criterion is met.
The integrated case structure
Many CPTE cases combine a cardiac and respiratory condition — a COPD patient post-CABG, a heart failure patient with pulmonary edema, a post-pneumonia patient who also has diabetes. The reasoning framework is always the same:
- Identify all active conditions and their exercise precautions
- Apply the most restrictive exercise parameter from any condition
- Prioritize safety monitoring (SpO₂, BP, HR, symptoms) during exercise
- Escalate when any stop criterion is met
This combined-condition reasoning is where most candidates lose marks on cardiorespiratory cases. Practise it explicitly by working through multi-diagnosis scenarios.
At PhysioExamPrep, the Cardiorespiratory chapter covers every condition and intervention type above with scenario-based questions, annotated rationales, and a complete mock exam in CPTE format.
Sources: Canadian Thoracic Society; Canadian Cardiovascular Society; GOLD COPD Guidelines; ACC/AHA Heart Failure Guidelines; Canadian Stroke Best Practice Recommendations.