Cardiac Rehabilitation — Core Principles
Evidence Base
NICE (NG185) and Cochrane meta-analyses confirm cardiac rehabilitation reduces cardiac mortality by approximately 25% and hospital readmission by up to 18%. Exercise-based CR reduces all-cause mortality and improves quality of life across all major cardiac diagnoses.
- Over 100 RCTs and meta-analyses support CR as Class IA recommendation (ESC)
- Benefits include reduced angina, improved exercise capacity, better risk factor profiles and psychological wellbeing
- Home-based and telerehab models shown equivalent outcomes to supervised centre-based programmes
- Cost-effective intervention: estimated £8,000 per QALY gained (NICE threshold <£20,000)
The Four Phases of Cardiac Rehabilitation
I
Inpatient
Hospital admission. Early mobilisation, education, risk stratification, psychological assessment. Begins Day 1 post-event.
II
Early Outpatient
Within 10 days of discharge. Home-based or centre visit. Individual assessment, goal-setting, medication review.
III
Supervised Exercise
6–12 week structured programme. Group or individual. Monitored exercise + education + psychological support.
IV
Long-term Maintenance
Ongoing self-management. Community exercise, lifestyle maintenance, annual review. Lifelong commitment.
Indications for Cardiac Rehab
- Post-myocardial infarction (STEMI / NSTEMI)
- Post-percutaneous coronary intervention (PCI / stenting)
- Post-coronary artery bypass graft surgery (CABG)
- Heart failure (HFrEF and HFpEF — NICE recommends CR for stable HF)
- Post-valve repair or replacement surgery
- Stable angina refractory to medical management
- Post-cardiac transplantation
- Peripheral arterial disease (PAD) — walking programme
Barriers to Participation
Patient-Level Barriers
- Cultural: Health beliefs, fatalism, collectivist decision-making
- Language: Non-English speakers — Arabic, Urdu, Tagalog materials needed
- Transport: Distance to centre, inability to drive post-MI
- Work: Fear of job loss, early return to work pressures
- Gender: Women significantly underrepresented — caregiving roles, lower referral rates
- Ethnicity: South Asian patients underrepresented despite higher IHD burden
System-Level Barriers
- Low referral rates from cardiology teams
- Limited programme availability in some GCC states
- Gender segregation limiting mixed group exercise classes
Cardiac Rehabilitation Nurse Specialist Role
Clinical Responsibilities
- Initial and ongoing patient assessment
- Exercise testing and prescription
- Medication reconciliation and adherence support
- Risk stratification (low / moderate / high)
- Wound and sternal precaution monitoring post-CABG
- ECG monitoring during supervised exercise sessions
Education & Support
- Diagnosis explanation and self-management education
- Risk factor modification counselling
- Psychological screening (HADS, PHQ-9)
- Return to work, driving, sexual activity guidance
- Family and carer involvement
- Liaison with GP, cardiologist, physiotherapy, dietetics
Phase I — Inpatient Cardiac Rehabilitation
Early Mobilisation Protocol
STEMI / NSTEMI Milestones
| Day | Activity Target |
|---|---|
| Day 1 | Bed rest, passive ROM, sit up in bed |
| Day 2 | Sit out of bed in chair 30 min, assisted wash |
| Day 3 | Standing at bedside, walk to bathroom |
| Day 4–5 | Corridor walking 50–100m with supervision |
| Day 5–7 | Stairs assessment if applicable, discharge planning |
Post-CABG Milestones
| Day | Activity Target |
|---|---|
| Day 1 (ICU) | Breathing exercises, leg exercises in bed |
| Day 2 | Sit out of bed, dangle legs |
| Day 3–4 | Stand with support, short walks with physio |
| Day 5–7 | Corridor walking 2–3 times daily, stairs |
| Week 2–3 | Home discharge, gentle home-based walking programme |
Activity Progression Monitoring
Stop or modify activity if any of the following occur:
Heart Rate
- Resting HR >100 bpm — delay activity
- Exercise HR increase >20 bpm above resting — reduce intensity
- New arrhythmia onset — stop, monitor, report
- Bradycardia <50 bpm — withhold exercise
Blood Pressure
- SBP >180 mmHg at rest — defer
- SBP drop >10 mmHg during exertion — stop immediately
- SBP >220 mmHg during exercise — stop
- Hypotension (SBP <90) — urgent review
Symptoms
- Chest pain or tightness — stop, GTN, ECG, call team
- Dyspnoea beyond mild breathlessness
- Dizziness or presyncope
- Pallor, diaphoresis, cyanosis
- Palpitations or irregular pulse
Inpatient Patient Education
Diagnosis Understanding
- Explanation of MI / PCI / CABG using simple language and diagrams
- What happened to the heart, what was done, what to expect
- Importance of medication adherence (dual antiplatelet therapy)
Medications
- Aspirin + P2Y12 inhibitor (clopidogrel / ticagrelor / prasugrel) — dual antiplatelet
- Statin — high intensity (atorvastatin 80mg) — do NOT stop
- ACE inhibitor / ARB — cardioprotective post-MI with reduced EF
- Beta-blocker — rate control, anti-ischaemic, anti-arrhythmic
- GTN spray — how and when to use, 3-dose rule, call 999 if no relief
Warning Signs (seek urgent help)
- Chest pain not relieved by GTN within 15 min
- Sudden worsening breathlessness, particularly at rest
- Ankle swelling, weight gain >2 kg in 2 days (HF signs)
- Palpitations, syncope, dizziness
- Wound redness, discharge, fever >38°C
Psychological Assessment — Inpatient
20–30% of patients experience clinical anxiety or depression following MI. Post-cardiac arrest PTSD rates reach 15–25%. Routine screening is essential.
HADS (Hospital Anxiety and Depression Scale)
- 14 items: 7 anxiety (HADS-A), 7 depression (HADS-D)
- Score per subscale: 0–7 normal, 8–10 borderline, 11–21 abnormal
- Complete at admission and at discharge/Phase II referral
- Validated in cardiac populations, brief, acceptable to patients
PHQ-9 (Depression)
- 0–4 minimal; 5–9 mild; 10–14 moderate; 15–19 moderately severe; 20–27 severe
- Score ≥10 = clinical depression — refer for psychological support / SSRI
Key Nursing Actions
- Normalise emotional responses — "it is very common to feel worried or low"
- Involve family with patient consent
- Refer to cardiac psychologist or liaison psychiatry if scores elevated
- Document and handover to Phase II team
Post-CABG Sternal Precautions
Sternal wound dehiscence is a serious complication of CABG. Precautions are maintained for 6 weeks post-surgery (until sternal healing confirmed).
Restrictions (6 weeks)
- No lifting objects >5 kg (approximately 1 bag of sugar)
- No pushing or pulling — including opening heavy doors, pushing trolleys
- No reaching overhead with both arms simultaneously
- No driving for at least 4–6 weeks (DVLA guidance)
- Log-roll technique when getting in/out of bed
- Support chest with pillow when coughing or sneezing
Wound Care
- Sternal wound: keep dry for 48h, then shower allowed — pat dry
- Leg harvest site (saphenous vein): compression stockings, elevate when sitting
- Daily inspection for: redness, swelling, discharge, separation, warmth
- Signs of mediastinitis (serious): fever, sternal click/movement, purulent discharge — urgent surgical review
- Avoid soaking (baths) until wound fully healed (~2 weeks)
Risk Factor Management
ABCDE Framework — Cardiovascular Risk Factor Modification
| Letter | Factor | Target / Intervention |
|---|---|---|
| A | Aspirin / Antiplatelet | Dual antiplatelet x12 months post-ACS; lifelong aspirin. ACE inhibitor post-MI with LV dysfunction |
| B | Blood Pressure | Target <130/80 mmHg post-MI (ESC 2021). Lifestyle + pharmacotherapy. ABPM for monitoring |
| C | Cholesterol | High-intensity statin: atorvastatin 80mg. LDL target <1.4 mmol/L (very high risk — ESC 2021). Add ezetimibe if not at target |
| D | Diabetes | HbA1c target 48–58 mmol/mol (6.5–7.5%) in CVD. SGLT2 inhibitor (empagliflozin) — cardioprotective. GLP-1 agonist (semaglutide) — weight and CV benefit |
| E | Exercise & Diet / Smoking | 150 min moderate exercise/week. Mediterranean diet. Complete smoking cessation — most impactful single intervention |
Smoking Cessation
Smoking is the most important modifiable cardiovascular risk factor. Cessation reduces MI risk by 50% within 1 year and halves it to near non-smoker levels within 5 years.
First-Line Pharmacotherapy
- Varenicline (Champix) — most effective single agent, 2–3× quit rate vs placebo. Nausea common side effect. Monitor mood.
- NRT (Nicotine Replacement Therapy) — patches, gum, inhaler, spray. Combination (patch + fast-acting) most effective
- Bupropion — second line; contraindicated in seizure history
Behavioural Support
- Brief intervention: 5 As — Ask, Advise, Assess, Assist, Arrange
- Referral to Stop Smoking Service doubles success rate
- Set quit date within 2 weeks of decision
- Address triggers and coping strategies
Lipid Management
ESC 2021 Targets
| Risk Category | LDL Target |
|---|---|
| Very high risk (post-ACS, established CVD) | <1.4 mmol/L AND >50% reduction |
| High risk (multiple risk factors) | <1.8 mmol/L AND >50% reduction |
| Moderate risk | <2.6 mmol/L |
Statin Therapy
- Atorvastatin 80mg — first-line high-intensity statin
- Rosuvastatin 20–40mg — alternative
- Side effects: myalgia (common, usually mild). Check CK if significant muscle pain
- If not at target on max statin: add ezetimibe 10mg
- PCSK9 inhibitors (evolocumab/alirocumab) — for very high risk not at target
Blood Pressure Management
Targets Post-MI
- Post-MI target: <130/80 mmHg (ESC 2021, NICE NG136)
- Elderly (>80 years): <140/80 mmHg — avoid over-treatment
- In diabetics with CKD: <130/80 mmHg
Pharmacological Approach
- Step 1: ACE inhibitor (ramipril) or ARB + CCB (amlodipine)
- Step 2: Add thiazide-like diuretic (indapamide)
- Step 3: Add spironolactone 25mg or increase diuretic
- Post-MI with LV dysfunction: ACE inhibitor + beta-blocker essential
- Beta-blockers not first-line for BP alone unless HF/post-MI
Lifestyle
- DASH diet: reduce sodium <6g/day, increase potassium
- Alcohol: <14 units/week men and women
- Weight: 5–10 mmHg reduction per 10kg weight loss
Diabetes in CVD
HbA1c Targets
- General CVD: 48–58 mmol/mol (6.5–7.5%)
- Avoid aggressive control (<48) in elderly — increases hypoglycaemia risk and mortality
Cardioprotective Agents
- SGLT2 inhibitors (empagliflozin, dapagliflozin) — reduce HF hospitalisation and CV death; NICE recommends in T2DM with established CVD
- GLP-1 agonists (semaglutide, liraglutide) — CV mortality benefit, weight loss; injectable weekly (semaglutide) or daily (liraglutide)
- Metformin — first-line, safe in CVD unless eGFR <30
- Sulphonylureas — risk of hypoglycaemia, avoid if possible in exercise programmes
Lifestyle Interventions
Mediterranean Diet Evidence
- PREDIMED trial: 30% CV event reduction
- High olive oil, nuts, fish, vegetables, whole grains
- Low red/processed meat, refined carbs, full-fat dairy
- 2 portions oily fish/week (omega-3)
- Moderate red wine acceptable (not applicable in GCC Muslim patients)
Physical Activity
- 150 min moderate intensity/week (brisk walk, cycling)
- OR 75 min vigorous intensity/week
- Muscle-strengthening 2 days/week
- Reduce prolonged sitting — break every 30 min
- Gradual increase from current level — 10% per week rule
Alcohol Reduction
- Limit to <14 units/week (men and women)
- No safe level established for cancer risk
- Abstinence recommended post-cardiac event
- Alcohol raises BP, triglycerides, arrhythmia risk
- N/A for practising Muslim patients in GCC
Exercise Prescription in Cardiac Rehabilitation
Exercise Assessment Methods
Treadmill Testing
- Bruce Protocol: 3-min stages, increasing speed and incline. Stage 1: 2.7 km/h at 10% grade. Maximal test to symptom limitation or end-points.
- Modified Bruce: Two additional low-intensity warm-up stages. Better for deconditioned/elderly/post-MI patients. Starts 2.7 km/h at 0% grade.
- End-points: angina, ST depression >2mm, systolic BP drop >10mmHg, arrhythmia, patient request
6-Minute Walk Test (6MWT)
- Submaximal test — excellent for HF, elderly, deconditioned
- Walk as far as possible in 6 minutes on flat 30m course
- Normal: 400–700m depending on age/sex/height
- Predicts prognosis in HF — distance <300m = poor prognosis
- Monitor: SpO2, HR, BP, Borg RPE, symptoms before/after
CPET — Cardiopulmonary Exercise Testing
- Gold standard for exercise capacity assessment
- Measures VO2 max — peak oxygen uptake (mL/kg/min)
- Normal VO2 max: >20 mL/kg/min. Severely reduced: <10
- Anaerobic threshold (AT) — used to set exercise intensity
- Used for: HF prognosis (VO2 <14 = consider transplant listing), pre-op risk, exercise prescription
- Simultaneous ECG, gas exchange, BP, SpO2 monitoring
Borg RPE Scale (6-20)
6–8
Very light
9–10
Light
11–13
Light–Somewhat Hard
14–16
Hard
17–20
Very Hard–Maximal
Target zone for cardiac rehab: RPE 11–13 (Light to Somewhat Hard)
Karvonen Formula — Target Heart Rate Calculation
THR = [(HRmax − HRrest) × Intensity%] + HRrest
Example Calculation
- Patient: Age 55, HRmax = 220 − 55 = 165 bpm
- HRrest = 70 bpm
- Target intensity: 50–70% for cardiac rehab
- Lower THR: [(165 − 70) × 0.50] + 70 = 117.5 bpm
- Upper THR: [(165 − 70) × 0.70] + 70 = 136.5 bpm
- Target zone: 118–137 bpm
HRmax Adjustment (beta-blockers)
- Beta-blockers reduce HRmax — standard 220-age formula overestimates
- Use measured HRmax from exercise test instead of predicted
- Alternatively use Borg RPE scale (11–13) as primary guide
- Heart rate reserve (HRR) = HRmax − HRrest
- 50–70% HRR = moderate intensity for cardiac rehab
Absolute Contraindications to Exercise
- Unstable angina (recent change in pattern, rest pain)
- Decompensated heart failure (fluid overload, orthopnoea)
- Uncontrolled significant arrhythmia (AF with rapid ventricular response, VT)
- SBP >200 mmHg or DBP >110 mmHg at rest
- Significant aortic stenosis (valve area <1.0 cm² — symptomatic)
- Acute myocarditis or pericarditis
- Recent pulmonary embolism or deep vein thrombosis
- Fever / acute systemic illness
- Resting ECG changes suggesting acute ischaemia
Exercise Programme Structure
Session Components
- Warm-up: 5–10 min low-intensity (walking/cycling at Borg 9–10). Essential to prevent ischaemia and arrhythmia at onset
- Aerobic phase: 20–40 min at target HR/Borg 11–13. Continuous or interval
- Cool-down: 5–10 min gradual reduction. Critical — prevents post-exercise hypotension and vagal arrhythmia
Resistance Training
- Begin after 5 weeks post-MI (cardiovascular stability established)
- Post-CABG: delay until sternal healing ~6 weeks — upper body only after clearance
- Start light weights: 40–60% 1-repetition maximum
- 2–3 sets of 10–15 repetitions, 2–3 sessions/week
- Avoid Valsalva manoeuvre — breathe out on effort
Exercise-Induced Warning Signs — Stop Exercise Immediately
Cardiac Symptoms
- Angina: Chest pain, tightness, pressure — Borg angina scale >3 — stop, sit, GTN
- Palpitations or awareness of irregular heartbeat
- Unexpectedly high or low heart rate
- SBP drop >10 mmHg from peak during ongoing exercise
Other Warning Signs
- Dyspnoea: Beyond expected breathlessness, unable to speak in sentences
- Presyncope: Dizziness, lightheadedness, visual disturbance
- Excessive fatigue: Disproportionate to exercise level
- Cyanosis or pallor
- SpO2 <88% (COPD/HF patients)
Post-exercise: patients should remain in supervised area for minimum 10 minutes cool-down period. Sudden cardiac death risk is highest in the first 10 minutes post-exercise.
Psychosocial Rehabilitation
Post-MI Psychological Distress
Depression post-MI doubles 5-year mortality risk (independent of cardiac severity). Treatment with SSRIs and CBT is safe and effective.
Type D Personality
- Defined by: Negative Affect (tendency to experience negative emotions) + Social Inhibition (tendency to inhibit self-expression)
- Prevalence ~25% in cardiac patients
- Associated with poorer cardiac outcomes, increased mortality, lower QoL
- Assessed using DS14 questionnaire (14-item scale)
- Important: not a contraindication to CR — these patients benefit greatly
Depression Post-MI
- Prevalence: 20–30% clinical depression; 40–65% depressive symptoms
- Risk factors: previous depression, female sex, social isolation, large infarct
- Treatment: CBT + SSRI (sertraline preferred in cardiac patients — SADHART trial)
- TCAs contraindicated post-MI (pro-arrhythmic)
- Exercise itself has antidepressant effect — key CR benefit
Anxiety and PTSD
Health Anxiety Post-MI
- Patients may over-interpret normal sensations as cardiac symptoms
- Can lead to avoidance behaviour — reduced activity, fear of exercise
- Important to normalise sensations, progressive exposure to activity
- GAD-7 screening for generalised anxiety
Post-Cardiac Arrest PTSD
- 15–25% develop PTSD after cardiac arrest (witnessed or survived)
- Flashbacks, hypervigilance, avoidance, sleep disturbance
- Screen with IES-R or PCL-5 at Phase II assessment
- Refer to clinical psychology; EMDR and trauma-focused CBT effective
- Witness/bystander PTSD: family members may also need support
Implantable Defibrillator (ICD) Anxiety
- Fear of shock, restricted activities, identity change
- Driving restrictions add to distress
- ICD support groups and specialist nurse counselling important
Activity Resumption Guidance
Sexual Activity
- Post-MI / Post-PCI uncomplicated: Resume after 4–6 weeks
- Prerequisite: able to climb two flights of stairs (equivalent metabolic demand)
- Equivalent to 3–5 METs of exertion
- Discuss proactively — many patients too embarrassed to ask
- Phosphodiesterase inhibitors (sildenafil) safe post-MI BUT contraindicated with nitrates — fatal hypotension
- Post-CABG: consider sternal precautions, avoid positions with upper body weight-bearing
Driving Resumption (DVLA UK)
| Event | Car/Motorcycle |
|---|---|
| Uncomplicated MI | 4 weeks |
| Successful PCI (elective) | 1 week |
| Successful PCI (STEMI/NSTEMI) | 1 week (if no complications) |
| CABG | 4–6 weeks (sternal) |
| New implanted ICD | 6 months (new indication) |
| Cardiac arrest / sustained VT | 6 months (notified DVLA) |
LGV/HGV licence: additional restrictions apply — notify DVLA.
Return to Work
- Office / sedentary work: 4–6 weeks post-MI / post-PCI
- Light physical work: 6–8 weeks
- Heavy physical / manual work: 6–12 weeks — requires functional assessment
- Post-CABG: sternal precautions limit physical work to 6–12 weeks
- Phased return recommended — start 50% hours, increase weekly
- Occupational health referral for manual workers
- GCC: many patients return early due to financial/job security pressures — address proactively
Adjustment, Coping and Behaviour Change
Illness Adjustment Stages
- Denial: Common immediately post-MI — may minimise severity. Do not reinforce but do not confront aggressively.
- Anger: "Why me?" — normal response. Acknowledge and validate.
- Bargaining: Making lifestyle promises. Use positively but set realistic expectations.
- Depression: See screening and treatment above.
- Acceptance: Engagement with rehabilitation. Most achieve this with support.
Motivational Interviewing Principles
- Express empathy — reflective listening
- Develop discrepancy — help patient see gap between values and current behaviour
- Roll with resistance — do not argue or confront
- Support self-efficacy — build confidence in ability to change
- Explore importance and confidence: "How important is X to you? How confident are you that you could change X?"
- SMART goal setting with patient ownership
GCC Context & Exam Preparation
GCC-Specific Cardiac Rehabilitation Considerations
Epidemiology & Burden
- High burden of ischaemic heart disease (IHD) in GCC — presenting in younger males than Western populations (40s–50s)
- Smoking prevalence 40–60% in Gulf males — major driver of premature IHD
- Obesity prevalence >35% in Gulf populations; diabetes prevalence 15–25%
- Diabetes and obesity frequently complicate cardiac rehabilitation outcomes
- Sedentary lifestyle prevalent — low baseline exercise capacity at CR referral
Programme Availability
- Structured Phase III CR programmes historically limited in some Gulf states — improving
- Saudi Arabia, UAE, Qatar have established programmes in major hospitals
- Home-based and telerehab CR models expanding rapidly post-COVID
- DHA (Dubai) and DOH (Abu Dhabi) have invested in cardiac nurse specialist roles
Cultural and Gender Considerations
- Gender segregation in exercise facilities limits women's access to group exercise CR
- Women in GCC are significantly underrepresented in cardiac rehab referrals
- Female-only programme delivery (female physiotherapists, closed sessions) improves participation
- Family involvement in decision-making — engage family members in education sessions
- Religious considerations: prayer times, modesty in exercise clothing
- Fatalism ("It is God's will") may reduce engagement with risk factor modification — sensitive approach needed
Ramadan and Exercise/Cardiac Rehab
- Exercise tolerance may be altered during fasting — dehydration risk
- Schedule sessions after Iftar (post-sunset meal) when appropriate
- Medication timing adjustments (antihypertensives, diuretics) required — liaise with cardiologist
- Electrolyte monitoring important for diuretic patients during Ramadan
- Many patients will fast regardless — provide guidance on recognising warning signs
DHA / DOH / SCFHS Exam Key Points
Phase Definitions (High Yield)
| Phase | Setting | Timing |
|---|---|---|
| Phase I | Inpatient hospital | Admission → discharge |
| Phase II | Early outpatient / home | Within 10 days of discharge |
| Phase III | Supervised programme | Weeks 2–12 post-event |
| Phase IV | Community / self-managed | Lifelong maintenance |
Mortality Benefit
- CR reduces cardiac mortality by 25% — NICE NG185
- Reduces hospital readmissions by ~18%
- Reduces depression and improves QoL
- Class IA recommendation in ESC guidelines
Risk Factor Targets — Memorise
| Factor | Target |
|---|---|
| LDL (very high risk post-ACS) | <1.4 mmol/L |
| Blood pressure post-MI | <130/80 mmHg |
| HbA1c in CVD | 48–58 mmol/mol |
| Physical activity | 150 min moderate/week |
| Statin of choice | Atorvastatin 80mg |
| Borg RPE target (CR) | 11–13 |
| CR exercise intensity | 50–70% HRR |
Activity Resumption — Exam Summary
| Activity | Post-MI (uncomplicated) | Post-PCI (uncomplicated) | Post-CABG |
|---|---|---|---|
| Driving (car) | 4 weeks | 1 week | 4–6 weeks |
| Return to office work | 4–6 weeks | 1–2 weeks | 6–8 weeks |
| Return to manual work | 6–12 weeks | 2–4 weeks | 8–12 weeks |
| Sexual activity | 4–6 weeks | 1–2 weeks | 6 weeks (sternal) |
| Resistance training | 5 weeks | 2–3 weeks | 6 weeks (sternal healed) |
| Phase III CR commencement | 2–6 weeks | 1–2 weeks | 4–8 weeks |
Telerehab and Home-Based CR in GCC
- Equivalent outcomes demonstrated vs. centre-based for low-to-moderate risk patients (REACH-HF, BACPR guidelines)
- DHA initiative: cardiac nurse specialist-led telerehab post-CABG with video consultations
- Wearable technology (smartwatch HR/step monitoring) enhancing remote supervision
- Particularly relevant for: rural areas in Saudi Arabia, expats without transport, working patients, women preferring home-based
- Challenges: digital literacy, internet connectivity, lack of group peer support
Post-MI Activity Resumption Guide — Interactive Tool
Select patient details to generate personalised activity recommendations. For guidance purposes — always defer to treating cardiologist.