FAQ: How Should a Cardiac Expert Witness Respond to Allegations of Fundamental Dishonesty in Post-Infarction Claims?

Allegations of fundamental dishonesty in post-infarction claims present unique challenges for both legal practitioners and expert witnesses. In cardiology medico-legal practice, such allegations often arise in cases involving delayed diagnosis of myocardial infarction (MI), disputed symptom severity, or contested functional impairment following an acute coronary event. The role of the cardiac expert witness is pivotal—not only in assessing clinical standards and causation but also in providing robust, evidence-based opinions that withstand scrutiny under CPR Part 35 and the broader legal framework governing expert evidence.

This FAQ addresses the concerns of solicitors, barristers, and case management practitioners navigating these complex claims. It outlines the clinical frameworks, legal principles, and expert methodologies that underpin a defensible response to allegations of fundamental dishonesty in cardiac litigation.

1. What is the Clinical Context of Post-Infarction Claims?

Post-infarction claims typically involve allegations of delayed or missed diagnosis of acute coronary syndrome (ACS), including ST-elevation myocardial infarction (STEMI), non-ST-elevation myocardial infarction (NSTEMI), or unstable angina. The clinical context is governed by established diagnostic pathways and risk stratification tools, which form the basis of expert assessment in medico-legal reports.

Key Clinical Frameworks

• High-Sensitivity Troponin Pathways: The Fourth Universal Definition of Myocardial Infarction and NICE guidance (NG185) advocate the use of high-sensitivity troponin assays with 0/1-hour or 0/3-hour rule-out/rule-in pathways. These pathways are critical in assessing whether a delayed diagnosis was clinically justifiable or constituted an alleged breach of duty.
• ECG Interpretation: Subtle ECG findings, such as posterior MI, de Winter T-waves, or Wellens syndrome, may be overlooked in non-specialist settings. Expert cardiologists are often required to interpret ECGs retrospectively, particularly where the alleged breach hinges on missed ischaemic changes.
• Risk Stratification Tools: Scores such as HEART, GRACE, and TIMI are used to assess the likelihood of ACS and guide management. In medico-legal practice, these tools may be applied retrospectively to evaluate whether clinical decision-making aligned with accepted standards at the time of the alleged breach.
• Chest Pain Triage: NICE chest pain guidance (CG95) provides a structured approach to assessing patients with suspected ACS. Deviations from this guidance—such as failure to escalate care or inappropriate discharge—are common focal points in breach of duty reports.

2. What is the Legal Relevance of Fundamental Dishonesty in Cardiac Claims?

Fundamental dishonesty, as defined under Section 57 of the Criminal Justice and Courts Act 2015, allows courts to dismiss a claim in its entirety if the claimant is found to have been fundamentally dishonest in relation to the primary claim or a related matter. In cardiac claims, allegations of fundamental dishonesty often centre on:

• Exaggerated or fabricated symptoms post-MI (e.g., NYHA class, CCS angina grading, or exercise tolerance).
• Disputed functional impairment, particularly where objective cardiac investigations (e.g., echocardiogram, stress testing, or cardiac MRI) do not correlate with reported symptoms.
• Misrepresentation of pre-existing cardiac disease or risk factors (e.g., hypertension, diabetes, or hyperlipidaemia) that may have contributed to the index event.
• Inconsistencies between medical records, witness statements, and the claimant’s reported history.

Key Legal Authorities

Expert witnesses must be mindful of the legal principles governing fundamental dishonesty, including:

• Gosling v Hailo Ltd [2021] – Clarifies the threshold for fundamental dishonesty, requiring a finding that the claimant’s dishonesty was such that it would substantially affect the presentation of the case.
• LOCOG v Sinfield [2018] – Establishes that dishonesty in a related head of claim (e.g., care costs) can taint the entire claim, even if the primary injury is genuine.
• CPR Part 35 – Mandates that expert evidence must be independent, objective, and within the expert’s area of expertise. Allegations of fundamental dishonesty do not absolve the expert of this duty; rather, they require a rigorous, evidence-based approach to assessing the claimant’s presentation.

3. What Are the Common Pitfalls in Post-Infarction Claims?

In cardiology medico-legal practice, several recurring issues can complicate the assessment of fundamental dishonesty allegations:

Diagnostic Overreach

Experts may be tempted to opine on whether a diagnosis should have been made if based on retrospective analysis of troponin trends or ECG changes. However, the Bolam/Bolitho test requires an assessment of whether the clinician’s decision-making fell within a responsible body of medical opinion at the time. Overreach occurs when experts fail to contextualise their opinions within the clinical environment, patient presentation, and available resources at the time of the alleged breach.

Causation Errors

In post-infarction claims, causation often hinges on whether the alleged delay in diagnosis materially contributed to the claimant’s outcome. Key considerations include:

• The timing of the alleged breach relative to the natural history of the MI (e.g., whether reperfusion therapy could have been administered within the therapeutic window).
• The claimant’s pre-existing cardiac risk profile (e.g., diabetes, smoking, or prior ischaemic events), which may independently contribute to prognosis.
• The application of the material contribution test (Bailey v MoD [2008], Williams v Bermuda Hospitals Board [2016]) in cases where multiple factors contributed to the outcome.

Apportionment Against Pre-Existing Disease

Where the claimant had pre-existing cardiac disease (e.g., coronary artery disease, hypertension, or cardiomyopathy), experts must carefully apportion the relative contributions of the alleged breach and the underlying condition. The eggshell skull principle applies, but this does not absolve the expert of the duty to assess whether the alleged breach worsened the claimant’s prognosis or merely accelerated an inevitable decline.

Range-of-Opinion Failures

In cases involving subtle ECG changes or borderline troponin elevations, there may be a legitimate range of clinical opinion regarding the appropriate management. Experts must acknowledge this range and avoid presenting their opinion as the only defensible approach. Failure to do so risks undermining the credibility of the report under cross-examination.

4. What Is the Role of the Cardiac Expert Witness?

The cardiac expert witness plays a critical role in addressing allegations of fundamental dishonesty by providing a balanced, evidence-based assessment of the claimant’s presentation, the alleged breach, and the causal link between the two. The expert’s report must be structured to address the following key questions:

1. Was the Alleged Breach Clinically Justifiable?

• Did the clinician’s decision-making align with a responsible body of medical opinion at the time (Bolam v Friern [1957])?
• Was the decision logically defensible (Bolitho v City and Hackney HA [1998])?
• Were the diagnostic pathways (e.g., high-sensitivity troponin, ECG interpretation) applied appropriately?

2. Is There Objective Evidence of the Claimant’s Cardiac Status?

• Do the results of cardiac investigations (e.g., echocardiogram, stress testing, cardiac MRI, or coronary angiography) correlate with the claimant’s reported symptoms?
• Are there discrepancies between the claimant’s functional impairment (e.g., NYHA class) and objective measures of cardiac function (e.g., left ventricular ejection fraction)?
• Do the medical records support the claimant’s reported history, or are there inconsistencies that warrant further investigation?

3. What Is the Causal Link Between the Alleged Breach and the Claimant’s Outcome?

• Could the alleged delay in diagnosis have been materially contributory to the claimant’s prognosis (Bailey v MoD [2008])?
• Would earlier intervention (e.g., PCI, thrombolysis) have altered the natural history of the MI?
• Are there pre-existing factors (e.g., diabetes, smoking, or prior ischaemic events) that independently contributed to the outcome?

4. Is There Evidence of Exaggeration or Fabrication?

• Are the claimant’s reported symptoms consistent with the objective findings on cardiac investigations?
• Are there inconsistencies in the claimant’s history, as documented in medical records or witness statements?
• Does the claimant’s functional impairment align with their reported activities of daily living (e.g., employment, hobbies, or social engagements)?

Report Types in Fundamental Dishonesty Cases

The type of report required will depend on the stage of the proceedings and the specific allegations:

• Screening & Merits Reports: Early assessment of the viability of the claim, particularly where fundamental dishonesty is suspected. These reports may highlight red flags, such as inconsistencies in the medical records or discrepancies between reported symptoms and objective findings.
• Breach of Duty Reports: Focused on whether the clinician’s actions fell below the standard expected of a reasonably competent practitioner. In cases involving fundamental dishonesty, the expert may need to address whether the alleged breach was a genuine error or a misrepresentation by the claimant.
• Causation Reports: Assessment of whether the alleged breach materially contributed to the claimant’s outcome. This is particularly relevant in post-infarction claims, where the timing of intervention and the claimant’s pre-existing risk profile are critical.
• Condition & Prognosis Reports: Evaluation of the claimant’s current cardiac status and future risk. These reports may address whether the claimant’s reported symptoms are consistent with their objective cardiac function and whether their prognosis has been materially worsened by the alleged breach.
• Critique & Rebuttal Reports: Review of opposing expert evidence, particularly where allegations of fundamental dishonesty are contested. The expert may be asked to identify flaws in the opposing expert’s methodology or conclusions.
• Single Joint Expert Reports: In some cases, a single joint expert may be instructed to provide a neutral assessment. The expert must remain impartial and avoid advocating for either party, even where fundamental dishonesty is alleged.

5. Practical Guidance for Solicitors

For legal practitioners handling post-infarction claims where fundamental dishonesty is alleged, the following steps can strengthen the case and ensure the expert’s evidence is robust:

Early Instruction of a Specialist Cardiac Expert

Instructing a consultant cardiologist with subspecialty expertise (e.g., interventional cardiology, electrophysiology, or heart failure) can provide critical insights into the nuances of the case. Early instruction allows the expert to:

• Review the medical records and imaging in detail, identifying potential red flags or inconsistencies.
• Assess whether the alleged breach aligns with accepted clinical pathways (e.g., high-sensitivity troponin, ECG interpretation).
• Provide an early opinion on the viability of the claim, particularly where fundamental dishonesty is suspected.

Provision of Comprehensive Records and Imaging

To enable the expert to conduct a thorough assessment, solicitors should provide:

• Full medical records, including GP notes, hospital admissions, and outpatient correspondence.
• All relevant cardiac investigations (e.g., ECGs, echocardiograms, stress tests, cardiac MRI, or coronary angiograms).
• Ambulance records, emergency department notes, and nursing observations.
• Any surveillance evidence or social media activity that may be relevant to the claimant’s reported symptoms.

Clear Instructions and Focused Questions

When instructing the expert, solicitors should provide clear, focused questions that address the key issues in the case. For example:

• Was the clinician’s decision-making in line with a responsible body of medical opinion at the time?
• Are the claimant’s reported symptoms consistent with the objective findings on cardiac investigations?
• Could the alleged delay in diagnosis have materially contributed to the claimant’s outcome?
• Are there inconsistencies in the claimant’s history that warrant further investigation?

Red Flags to Raise Early

Solicitors should be alert to potential red flags that may indicate fundamental dishonesty, including:

• Discrepancies between the claimant’s reported symptoms and the objective findings on cardiac investigations.
• Inconsistencies in the claimant’s history, as documented in medical records or witness statements.
• Evidence of the claimant engaging in activities that are inconsistent with their reported functional impairment (e.g., employment, hobbies, or social engagements).
• Surveillance evidence or social media activity that contradicts the claimant’s reported symptoms.

Conclusion

Allegations of fundamental dishonesty in post-infarction claims require a rigorous, evidence-based approach from both legal practitioners and expert witnesses. The cardiac expert’s role is to provide an independent, objective assessment of the claimant’s presentation, the alleged breach, and the causal link between the two—while adhering to the principles of CPR Part 35 and the broader legal framework governing expert evidence.

For solicitors, early instruction of a specialist cardiac expert, provision of comprehensive records, and clear, focused questions are essential to ensuring the expert’s evidence is robust and defensible. Where fundamental dishonesty is alleged, the expert’s report must address not only the clinical aspects of the case but also the consistency of the claimant’s presentation with objective findings and the medical records.

Specialist cardiology medico-legal assessment from an experienced consultant cardiologist expert witness can be pivotal in cases of this nature—particularly where causation, life expectancy, or subspecialty questions are in play.