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Cardio: 50 High-Yield Facts | MRCP Part 1 |

TL;DR

Cardio: 50 High-Yield Facts (Cardiology) is a rapid revision guide tailored for MRCP Part 1, focusing on the most frequently tested cardiology concepts. Prioritise ECG interpretation, acute coronary syndromes, valvular lesions, and heart failure management. Use this list for final revision and consolidate learning through MCQs and mocks. Avoid common exam traps such as misinterpreting murmurs and ECG patterns.


Why this matters

Cardiology is one of the highest-yield subjects in MRCP Part 1, often accounting for a substantial proportion of exam questions. The exam tests both conceptual understanding and pattern recognition—especially ECGs and murmurs. A focused revision of high-yield facts allows candidates to maximise scoring efficiency.

Start with a structured roadmap via the MRCP Part 1 overview and reinforce knowledge using Free MRCP MCQs.


Core sections

The 5 most tested cardiology domains

  1. Ischaemic heart disease

  2. Arrhythmias and ECG interpretation

  3. Valvular heart disease

  4. Heart failure

  5. Cardiomyopathies and congenital conditions

Cardio: 50 High-Yield Facts

1. Ischaemic Heart Disease

  1. ST elevation in contiguous leads indicates transmural ischaemia

  2. Troponin rises within 3–6 hours and peaks at 24 hours

  3. NSTEMI = raised troponin without ST elevation

  4. Primary PCI is preferred within 120 minutes of STEMI

  5. Posterior MI shows ST depression in V1–V3

  6. Inferior MI typically involves the right coronary artery

  7. Beta-blockers reduce mortality post-MI

  8. ACE inhibitors prevent adverse remodelling

  9. Dual antiplatelet therapy is standard after ACS

  10. Dressler’s syndrome is autoimmune pericarditis post-MI

2. Arrhythmias & ECG

  1. Atrial fibrillation is “irregularly irregular”

  2. CHA₂DS₂-VASc score determines anticoagulation need

  3. Narrow complex tachycardia suggests SVT

  4. Broad complex tachycardia should be treated as VT

  5. Stable VT → amiodarone

  6. VF/pulseless VT → defibrillation

  7. First-degree AV block = prolonged PR interval

  8. Mobitz I shows progressive PR prolongation

  9. Mobitz II has sudden dropped beats (high risk)

  10. Complete heart block shows AV dissociation

3. Valvular Heart Disease

  1. Aortic stenosis → ejection systolic murmur radiating to carotids

  2. Triad: angina, syncope, dyspnoea

  3. Mitral regurgitation → pansystolic murmur radiating to axilla

  4. Mitral stenosis → opening snap + mid-diastolic murmur

  5. Aortic regurgitation → early diastolic murmur

  6. Wide pulse pressure seen in AR

  7. Infective endocarditis presents with fever + murmur

  8. Prosthetic valves increase endocarditis risk

  9. Rheumatic fever commonly affects mitral valve

  10. Severe AS → avoid vasodilators

4. Heart Failure

  1. HFrEF = systolic dysfunction

  2. HFpEF = diastolic dysfunction

  3. BNP is elevated in heart failure

  4. ACE inhibitors are first-line

  5. Beta-blockers improve survival

  6. Loop diuretics relieve fluid overload

  7. Spironolactone reduces mortality

  8. SGLT2 inhibitors are now guideline-recommended

  9. Acute pulmonary oedema → oxygen, nitrates, diuretics

  10. Cardiogenic shock = hypotension + poor perfusion

5. Miscellaneous & Congenital

  1. Hypertrophic cardiomyopathy → sudden death risk

  2. Murmur increases with Valsalva in HCM

  3. Dilated cardiomyopathy → systolic dysfunction

  4. Restrictive cardiomyopathy → diastolic dysfunction

  5. Pericarditis pain improves on leaning forward

  6. Cardiac tamponade → Beck’s triad

  7. Coarctation of aorta → radiofemoral delay

  8. Eisenmenger syndrome → reversed shunt

  9. Long QT → torsades de pointes risk

  10. Hyperkalaemia → peaked T waves


Quick Revision Table

Condition

Key Feature

Exam Clue

Aortic stenosis

Systolic murmur

Radiates to carotids

Atrial fibrillation

Irregular rhythm

No P waves

STEMI

ST elevation

Contiguous leads

Heart failure

Raised BNP

Dyspnoea + oedema

Tamponade

Beck’s triad

Hypotension, JVP, muffled sounds


Practical examples / mini-cases

MCQ: A 72-year-old man presents with sudden onset palpitations. ECG shows an irregularly irregular rhythm with no visible P waves. What is the most appropriate next step in management?

A. Immediate defibrillationB. Start anticoagulation based on CHA₂DS₂-VAScC. Give adenosineD. Perform carotid massage

Answer: B. Start anticoagulation based on CHA₂DS₂-VASc

Explanation: This is atrial fibrillation. Stroke prevention with anticoagulation is guided by CHA₂DS₂-VASc score—one of the most commonly tested MRCP concepts.


Medical student revising cardiology notes and ECGs for MRCP Part 1 exam preparation

Common pitfalls (5 bullets)

  • Misreading pericarditis as STEMI (diffuse vs regional ST elevation)

  • Confusing Mobitz I with Mobitz II

  • Missing posterior MI patterns

  • Misidentifying murmur timing

  • Ignoring anticoagulation indications in AF


Practical study-tip checklist


FAQs

1. How much cardiology appears in MRCP Part 1?

Cardiology is heavily tested, often forming a large proportion of questions, especially ECGs and heart failure.

2. What is the best strategy for ECG revision?

Daily practice with pattern recognition is key—focus on rhythm, intervals, and ST changes.

3. Are treatment guidelines important?

Yes, especially first-line therapies such as ACE inhibitors and anticoagulation decisions.

4. How do I remember murmurs effectively?

Learn by timing, location, and radiation. Repetition and audio aids can help.

5. How many questions should I practise?

Aim for 1500–2000 MCQs with detailed review of explanations.


Ready to start?

Master cardiology for your exam by combining concise revision with practice. Begin with the MRCP Part 1 overview, test yourself with Free MRCP MCQs, and build exam confidence using a Start a mock test.


Sources

 
 
 

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