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Left ventricular aneurysm, a late complication of a heart attack, and how it is managed today.

Modern care combines four-pillar heart failure therapy, careful arrhythmia management, and, for the right patient, surgical repair.

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A radiographer guides a patient onto the bed of an advanced 3 Tesla MRI scanner in a London imaging suite

Why trust this guide

  • 01

    Editorial team

    Written by our editorial team from the UK sources listed on each page.

  • 02

    Sourced from guidance

    Aligned with ESC and AHA statements on post-infarction complications, heart failure and ventricular arrhythmia.

  • 03

    Current for 2026

    Reflects modern practice: four-pillar heart-failure therapy, ICD indications and surgical ventricular restoration.

Key facts

Left ventricular aneurysm at a glance.

The essentials, in plain English: what it is, where it forms, and how the UK cardiology community approaches it.

  • What it is

    A localised outward bulging of scarred left ventricular wall, containing all three myocardial layers, after a transmural heart attack.

  • Most common site

    Anterior and apical wall following an anterior ST-elevation myocardial infarction.

  • True vs pseudo

    A pseudoaneurysm is a contained rupture, not a true aneurysm. It carries a high risk of full rupture and needs urgent surgery.

  • Getting rarer

    Incidence has fallen substantially in the primary PCI era because early reperfusion limits infarct size.

  • Foundation therapy

    Four-pillar heart failure regimen: ACE inhibitor or ARB or ARNI, beta blocker, mineralocorticoid antagonist and an SGLT2 inhibitor.

  • When surgery fits

    Refractory heart failure, refractory ventricular tachycardia, or a large thin-walled aneurysm may warrant surgical ventricular restoration.

Why this guide matters

A structured plan, not a mystery diagnosis.

Left ventricular aneurysm is a well-defined complication of a heart attack. It has a well-defined treatment ladder.

  • Distinguish true from pseudo

    Telling a true aneurysm from a pseudoaneurysm changes everything. One is chronic, the other is a surgical emergency.

  • Four pillars are the backbone

    ACE inhibitor or ARB or ARNI, beta blocker, mineralocorticoid antagonist and SGLT2 inhibitor form the core of modern therapy.

  • Surgery still has a role

    For refractory heart failure, refractory ventricular tachycardia or very large aneurysms, surgical ventricular restoration remains valuable.

How the diagnosis is made

From ECG through to MRI and MDT.

The steps a UK cardiologist will normally follow, from bedside to advanced imaging.

  1. 01

    Assessing

    History and prior MI

    A careful account of any previous heart attack, breathlessness, palpitations, chest pain and stroke-like events, with red-flag screening.

  2. 02

    Assessing

    Examination

    Looking for a dyskinetic or displaced apex beat, a third heart sound gallop and signs of heart failure.

  3. 03

    Assessing

    ECG

    Persistent ST elevation more than two weeks after a heart attack, with deep Q waves in the affected leads, is highly suggestive.

  4. 04

    Confirming

    Echocardiography

    The first-line imaging test. Defines the aneurysm, wall motion, ejection fraction and any thrombus.

  5. 05

    Confirming

    Cardiac MRI

    The gold standard for anatomy, myocardial viability and detection of layered thrombus. Requested by a specialist.

  6. 06

    Planning

    Left ventriculography

    Selective imaging at the time of coronary angiography, used in selected cases before surgical planning.

  7. 07

    Planning

    Cardiac MDT review

    Cardiology and cardiac surgery review complex cases together to agree medical, device and surgical options.

Typical timeline: weeks from suspicion to a considered plan.

Symptoms

What it can feel like.

Many aneurysms are silent. Others show up as breathlessness, palpitations, angina, or the effects of a small clot.

  • Often silent

    Small aneurysms are frequently found incidentally on imaging with no symptoms at all.

  • Heart failure symptoms

    Breathlessness on exertion, orthopnoea, ankle swelling and fatigue from a poorly contracting left ventricle. See our heart-failure guide.

  • Palpitations and arrhythmia

    Ventricular tachycardia can arise from scar at the border of the aneurysm and needs urgent specialist assessment.

  • Thromboembolism

    Stagnant blood in the aneurysm can form clot. If it dislodges it can cause stroke, limb ischaemia or visceral infarction.

  • Angina

    Ongoing coronary disease around the infarct may still cause chest discomfort on exertion.

  • Dyskinetic apex

    A visible or palpable outward bulge of the apex on examination can be the first clue.

  • Third heart sound

    An added gallop rhythm reflects a stiff, poorly filling ventricle.

  • Red flag: pseudoaneurysm

    A contained rupture behaves quite differently to a true aneurysm. Rapid deterioration, new murmur or shock needs emergency assessment.

Treatment

How left ventricular aneurysm is treated.

Medical therapy first, with anticoagulation and rhythm-control layered on. Surgery for refractory disease or pseudoaneurysm.

  • Heart failure medication

    The four pillars of therapy: ACE inhibitor or ARB or ARNI, beta blocker, mineralocorticoid antagonist and SGLT2 inhibitor.

  • Anticoagulation

    Warfarin is used when left ventricular thrombus is present or the risk of clot formation is judged high. A specialist decision.

  • Antiarrhythmic therapy

    Beta blockers first, with amiodarone considered for recurrent ventricular tachycardia under specialist care.

  • Implantable cardioverter defibrillator

    Considered for patients with reduced ejection fraction or documented sustained ventricular tachycardia, per ESC guidance.

  • Catheter ablation

    Electrophysiology-guided ablation of scar-related ventricular tachycardia when medication alone is not enough.

  • Revascularisation

    Coronary angioplasty or bypass surgery for ongoing angina and viable myocardium around the aneurysm.

  • Surgical ventricular restoration

    The Dor procedure and related techniques reshape the ventricle, resect scar and can help refractory heart failure or arrhythmia.

  • Advanced heart failure therapy

    A left ventricular assist device or heart transplant for end-stage disease. A highly specialist decision.

What this guide is based on

The sources behind every claim on this page.

National and international cardiology guidance, current at the time of last review.

Key references

Guidelines and standards we relied on.

A quiet reminder

This guide is for information, not medical advice.

Your cardiologist knows your history and imaging and can tell you which parts apply to you. If in doubt, get seen.

  • European Society of Cardiology. Guidelines on acute and chronic heart failure.

  • European Society of Cardiology. Guidelines on ventricular arrhythmias and prevention of sudden cardiac death.

  • American Heart Association / ACC. Scientific statements on post-infarction left ventricular remodelling.

  • NICE. Chronic heart failure in adults: diagnosis and management (NG106).

Red flags

When to escalate care urgently.

Most left ventricular aneurysms are managed in the outpatient setting. These situations need same-day or emergency care.

  • Suspected pseudoaneurysm

    A contained rupture. New shock, a new murmur, or rapidly worsening breathlessness after a recent heart attack needs emergency imaging and surgical review.

  • Sustained ventricular tachycardia

    Palpitations with syncope, near-collapse or shock require urgent hospital assessment. Call 999.

  • Acute stroke or limb ischaemia

    A cold, pale limb or new neurological symptoms may be an embolic event from a ventricular clot. Emergency.

  • Decompensated heart failure

    Sudden severe breathlessness at rest, pink frothy sputum or profound leg swelling needs same-day medical review.

  • Recurrent chest pain

    New or crescendo angina after a previous heart attack may signal further coronary disease and needs urgent assessment.

  • Syncope on exertion

    Blackouts during effort in someone with a prior heart attack are a warning sign for arrhythmia and need cardiology review.

  • INR instability on warfarin

    Very high or very low readings during anticoagulation for LV thrombus need prompt review by the anticoagulation team.

  • Device-related concerns

    A working ICD that has shocked, or new symptoms after an implant, needs same-day contact with the device clinic.

  • Signs of infection over an implant

    Redness, swelling or fever around an ICD or LVAD site needs urgent specialist review.

Living with it

A serious diagnosis, a clear routine.

Four things that make the biggest difference day to day: structured rehab, daily medication, watchful weight monitoring, and knowing when to escalate.

A quiet reminder

Consistency beats intensity, every time.

Small, steady habits kept up for years do more for your heart than a heroic month that does not last.

  1. 01 Rehab

    Cardiac rehabilitation matters

    A structured programme improves symptoms, exercise tolerance and long-term outlook after any significant heart attack.

  2. 02 Meds

    Take the four pillars daily

    The heart failure regimen works best when taken every day. Do not stop or halve doses without your cardiology team.

  3. 03 Monitor

    Weigh yourself weekly

    A steady rise in weight can be an early sign of fluid build-up. Report a gain of two kilograms or more in a few days.

  4. 04 Escalate

    Do not ignore new palpitations

    Sustained palpitations, dizzy spells or blackouts warrant an urgent cardiology assessment.

Frequently asked

Common questions about left ventricular aneurysm.

Quick answers on diagnosis, medication, ICDs and surgery.

  • What is a left ventricular aneurysm?

    It is a localised outward bulging of the left ventricular wall that develops after a heart attack. The scarred, thinned muscle contains all three layers of the heart wall, which distinguishes a true aneurysm from a pseudoaneurysm.

  • How is it different from a pseudoaneurysm?

    A pseudoaneurysm is a contained rupture of the heart wall. The bulge is only held in by clot and the outer lining of the heart, so the risk of full rupture is high. It usually needs urgent surgical repair, in contrast to many true aneurysms which are managed medically.

  • How is it diagnosed?

    A cardiologist puts together the history of a previous heart attack, the physical examination, an ECG showing persistent ST elevation and Q waves, and imaging. Echocardiography is first line, and cardiac MRI is the gold standard for anatomy, viability and detection of thrombus.

  • What medications are used?

    Treatment centres on the four pillars of heart failure therapy: an ACE inhibitor, ARB or ARNI, a beta blocker, a mineralocorticoid antagonist and an SGLT2 inhibitor. Anticoagulation with warfarin is added if there is left ventricular thrombus or a high clot risk.

  • When is surgery considered?

    Surgery is considered when medication alone does not control heart failure or refractory ventricular tachycardia, or when the aneurysm is very large and thin walled. Surgical ventricular restoration, sometimes called the Dor procedure, reshapes the ventricle. A pseudoaneurysm is a separate surgical emergency.

  • Do I need an ICD or ablation?

    An implantable cardioverter defibrillator is considered for people with a significantly reduced ejection fraction or documented sustained ventricular tachycardia. Catheter ablation targets the scar tissue driving the arrhythmia. Both are highly specialist decisions taken with your cardiology and electrophysiology team.

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