Last Updated on April 23, 2026 by tanya

How to File a Claim for Missed Acute Coronary Syndrome (ACS)

About Our Legal Expert: This content is produced under the oversight of Michael Jefferies, First Personal Injury Director, who brings over 30 years of legal experience.

Written by Tanya Waterworth, Digital Content Writer

Medical Negligence Compensation for a Missed or Misdiagnosis for ACS

If you have been misdiagnosed or suffered from a missed diagnosis, here’s how to file a claim for a missed Acute Coronary Syndrome. Also referred to as ACS, this is considered a medical emergency which requires immediate diagnosis and treatment. However, if a healthcare provider fails too recognise its signs, the patient may suffer long term consequences.

If this has affected you or a loved one, you may be entitled to file a medical negligence claim, First Personal Injury can help. We partner with medical negligence lawyers who work on a ‘No Win, No Fee’ basis and who offer an initial, no-obligation consultation which is also free.

What Is Acute Coronary Syndrome (ACS)?

Acute Coronary Syndrome is an umbrella term for conditions where the blood supplied to the heart muscle is suddenly blocked. This may include:

• Heart attacks
• Unstable angina

Prompt treatment such as angioplasty, medication, or surgery is critical. Any delay or failure to diagnose ACS can result in irreversible heart damage, disability, or may even be fatal.

Red Flags That ACS Has Been Missed or Misdiagnosed

Healthcare professionals have a legal duty of care to recognise and act upon ACS symptoms. If any of the following occurred, medical negligence may have taken place:

1. Common Symptoms Were Dismissed

Persistent chest pain or pressure was labelled as indigestion, anxiety, or muscular pain.

Shortness of breath, sweating, or pain radiating to the arm or jaw was not fully investigated.

2. ECG or Blood Tests Were Not Performed or Were Misinterpreted

No ECG was performed despite clear symptoms.

Troponin tests (which detect heart muscle damage) were not carried out, delayed, or misread.

3. You Were Discharged Too Early

You were sent home without observation or referred to a specialist.

Symptoms were downplayed without follow-up care or instructions.

4. Treatment Was Delayed

There was no immediate intervention despite a diagnosis of ACS.

You were not provided essential medications such as antiplatelets, nitrates, or anticoagulants.

5. Avoidable Long-Term Effects

If you suffered complications such as heart failure, long-term disability, reduced life expectancy, or a family member died due to delayed treatment, strongly indicates medical negligence.

Do You Have Grounds for a Medical Negligence Claim?

To make a successful claim for clinical negligence, you must demonstrate:

Duty of care – The medical professional owed you a duty to treat you competently.

Breach of duty – They failed to follow accepted medical standards.

Causation – This failure directly caused you injury, harm, or financial loss.

If a reasonable and competent doctor would have diagnosed and treated ACS sooner, you may be eligible to claim compensation.

How to File a Claim for Missed or Misdiagnosed Acute Coronary Syndrome (ACS)

Step 1: Seek Legal Advice Immediately

Contact a specialist medical negligence solicitor who has experience in cardiology-related claims. They can assess your case in a free initial consultation.

Step 2: Gather Evidence

Your solicitor will help you collect key documents which may include:

• Medical records and hospital reports
• ECG, blood test, and imaging results
• Witness statements
• Records of any follow-up care or hospital admissions
• Evidence of financial losses, such as loss of earnings or care costs

Step 3: Medical Expert Review

Your legal team will commission an independent cardiologist to review your treatment and confirm whether the misdiagnosis fell below acceptable standards.

Step 4: Letter of Claim

Your solicitor will issue a formal Letter of Claim to the NHS Trust or private healthcare provider, outlining the alleged negligence and the harm caused as a consequence.

Step 5: NHS Response

The healthcare provider must respond within four months under the Pre-Action Protocol. They may accept liability or dispute the claim.

Step 6: Settlement or Court Proceedings

Most claims settle out of court. If the provider disputes negligence, your solicitor may issue court proceedings to secure compensation.

What Compensation Could You Receive?

Compensation for misdiagnosed ACS aims to put you back in the position you would have been in if the negligence had not occurred. Therefore, you may be eligible for:

General Damages

• Pain and suffering
• Loss of quality of life
• Psychological trauma

Special Damages

• Private healthcare costs
• Rehabilitation and physiotherapy
• Loss of earnings or pension
• Travel expenses and care costs
• Future financial losses

Fatal Claims

If a loved one has died due to missed ACS, you may be able to claim:

• Funeral expenses
• Dependency compensation
• Bereavement damages (currently £15,120 in England and Wales)

Time Limits: Act Now

You generally have three years from the date of negligence or from when you first realised the misdiagnosis or missed diagnosis caused harm (known as the “date of knowledge”).

Exceptions include:

Children – Claims can be made at any time until their 18th birthday, after which they have three years to file.

Lack of capacity – No time limit applies if the patient is unable to make decisions due to severe brain injury.

It is essential to seek legal advice promptly to avoid missing these strict deadlines.

Why Choose a Specialist Medical Negligence Solicitor?

Filing a claim for ACS misdiagnosis is complex and requires expert medical understanding. A specialist solicitor will:

Obtain medical expert opinions

Build a strong case proving negligence and causation

Maximise your compensation

Operate on a No Win, No Fee basis (Conditional Fee Agreement). This ensures you face no financial risk in filing your claim.

What to Do Next

If you suspect your ACS was missed or misdiagnosed:

1. Write down your symptoms and treatment timeline
2. Request copies of your medical records
3. Contact a medical negligence solicitor immediately
4. Do not delay—your health and your right to compensation depend on prompt action

FAQs: Missed or Misdiagnosed ACS Claims

Can I claim if my heart attack was misdiagnosed as anxiety or indigestion?

Yes. If a doctor dismissed your symptoms and you suffered a heart attack as a result, you may be eligible to file a medical negligence claim.

How long do I have to claim for ACS misdiagnosis in the UK?

You have three years from the date of negligence or the date you became aware of it. However, exceptions apply for children and those lacking mental capacity.

What evidence do I need for an ACS negligence claim?

You will need medical records, ECG results, blood test reports, witness statements, and proof of financial loss. A solicitor will assist in gathering your documentation.

Do I have to go to court?

Can I claim for a loved one who died due to missed ACS?

Yes. You can bring a fatal medical negligence claim on behalf of their estate and dependants.

Call Our Team Now

A misdiagnosis of Acute Coronary Syndrome can change your life forever. By taking swift legal action, you can hold healthcare providers accountable and secure the compensation you deserve for your pain, suffering, and future care needs.

If you believe you have a case, now is the time to act.

First Personal Injury can guide you through the process to get the compensation you deserve. We work with experienced lawyers who work on a ‘No Win, No Fee’ basis. Call us at 0333 358 2345 or contact us online for a free consultation.

This article provides general legal information and should not be construed as legal or medical advice. In all instances you should always consult with a medical professional around life expectancy questions.