# Ethics and Shared Decision-Making in Cardiothoracic Surgery

## Introduction

Cardiothoracic surgery involves high-stakes interventions where decisions about operative candidacy, surgical approach, and goals of care carry profound consequences. Shared decision-making (SDM) integrates the surgeon's clinical expertise with the patient's values, preferences, and circumstances. Ethical frameworks guide clinicians through dilemmas involving informed consent, futility, resource allocation, and end-of-life care in the CT surgical population.

## Foundational Ethical Principles

### The Four Pillars of Medical Ethics

Autonomy is the principle of respecting the patient's right to make informed decisions about their own care. Beneficence requires acting in the patient's best interest with the goal of improving health outcomes. Non-maleficence demands avoiding harm and weighing procedural risks against anticipated benefit. Justice calls for fair allocation of resources and equitable access to surgical therapies.

### Application to CT Surgery

| Principle | Definition | CT Surgery Application | Common Challenges |
|-----------|-----------|----------------------|-------------------|
| Autonomy | Patient's right to informed self-determination | Consent for high-risk surgery; refusal of intervention | Critical illness, sedation, cognitive impairment |
| Beneficence | Acting in the patient's best interest | Surgery that meaningfully improves QoL/survival | Defining "benefit" in marginal candidates |
| Non-maleficence | Avoiding harm | Restraint when operative risk exceeds benefit | Pressure to "do something" |
| Justice | Fair allocation of resources | Organ allocation, ECMO candidacy, ICU utilization | Scarcity; implicit bias in referral patterns |

Autonomy may be challenged when patients are critically ill, sedated, or cognitively impaired. Beneficence requires honest appraisal of whether surgery will meaningfully improve quality or quantity of life. Non-maleficence demands restraint when operative risk exceeds potential benefit. Justice considerations arise in organ allocation, ECMO candidacy, and ICU resource utilization.

## Shared Decision-Making in Practice

### The SDM Framework

SDM is a collaborative process in which clinicians and patients jointly arrive at treatment decisions. Three essential elements define the process: choice talk (acknowledging that a decision exists), option talk (discussing alternatives with their risks and benefits), and decision talk (exploring preferences and reaching agreement). SDM is particularly critical when multiple treatment options exist with different risk-benefit profiles, such as CABG versus PCI or surgical versus transcatheter valve replacement.

### Decision Aids and Communication Tools

Visual decision aids improve patient comprehension of procedural risks and outcomes. STS risk calculator results should be communicated in accessible language. Use of absolute risk rather than relative risk when presenting outcomes improves understanding. The teach-back method confirms patient understanding of key information. Interpreter services are essential for patients with limited English proficiency.

![Diagram of the shared decision-making process in cardiac surgery](images/shared-decision-making-process.png)

### Barriers to Effective SDM

Time constraints in urgent or emergent settings limit the opportunity for thorough deliberation. Health literacy limitations and numeracy challenges affect patients' ability to understand risk statistics. The power differential between surgeon and patient can inhibit open discussion. Cognitive biases including anchoring, framing effects, and optimism bias among surgeons may skew recommendations. Family dynamics may override patient autonomy, and cultural factors influence attitudes toward surgery, death, and disability.

## Informed Consent in CT Surgery

### Elements of Valid Consent

Valid consent requires disclosure of the nature of the procedure, expected benefits, material risks, and alternatives including no intervention. Comprehension is demonstrated when the patient shows understanding of the disclosed information. Voluntariness ensures the decision is free from coercion by providers, family, or institutional pressure. Capacity confirms that the patient possesses the cognitive ability to understand, appreciate, reason, and communicate a choice.

### Special Consent Considerations

Emergency cardiac surgery often proceeds under implied consent or surrogate authorization. Advance directives and durable power of attorney for healthcare should be reviewed preoperatively. Intraoperative decision changes, such as a planned repair converted to replacement, should be discussed preoperatively as contingencies. Consent for blood products must be specifically addressed, especially in patients who decline transfusion on religious grounds.

## Medical Futility and Goals of Care

### Defining Futility

Quantitative futility describes an intervention with less than a 1% chance of achieving the desired physiological outcome. Qualitative futility describes an intervention that may achieve a physiological goal but fails to benefit the patient as a whole person. No universally accepted definition exists, and institutional futility policies provide a framework for dispute resolution. Futility determinations should involve multidisciplinary ethics consultation.

### Goals of Care Conversations

Goals of care conversations should occur before elective surgery and at critical decision points during postoperative care. These discussions explore what outcomes are acceptable to the patient, including survival, functional independence, and freedom from suffering. They distinguish between cure-directed, life-prolonging, and comfort-focused goals. Palliative care consultation should be integrated early in high-risk surgical patients rather than reserved for the dying.

![Flowchart for goals of care discussion in high-risk cardiac surgery patients](images/goals-of-care-flowchart.png)

## End-of-Life Decisions in CT Surgery

### Withdrawal of Life-Sustaining Treatment

Withdrawal of mechanical ventilation, vasopressors, ECMO, or mechanical circulatory support may be ethically appropriate when continued treatment is futile or contrary to the patient's wishes. Withdrawal is ethically and legally equivalent to withholding treatment, and there is no obligation to continue ineffective therapy. ECMO de-escalation requires a structured protocol with family preparation, symptom management, and bereavement support. LVAD deactivation is a complex ethical issue considered analogous to withdrawal of other life-sustaining treatments.

### Surgeon Moral Distress

CT surgeons experience significant moral distress when operating on patients unlikely to benefit. The "failure to rescue" culture may drive intervention beyond the point of benefit. Debriefing, peer support, and ethics consultation mitigate burnout and moral injury. Surgeons retain the right to decline an operation they believe is futile, provided appropriate transfer and continuity of care are arranged.

## Equity and Access

Significant racial and socioeconomic disparities exist in access to cardiac surgery and outcomes. Black patients are less likely to be referred for CABG and more likely to undergo PCI. Women are underrepresented in clinical trials and have historically worse outcomes after cardiac surgery. Implicit bias training and standardized referral protocols promote equitable care.

![Illustration of ethical considerations across the cardiac surgical care continuum](images/ethics-ct-surgery-continuum.png)

## Key Clinical Pearls

Shared decision-making is not simply obtaining informed consent; it is a collaborative deliberation process that integrates patient values with clinical evidence. Contingency plans such as conversion from repair to replacement should be discussed during preoperative consent to avoid intraoperative ethical dilemmas. Palliative care should be introduced early in high-risk cardiac surgical patients, as it complements rather than replaces curative intent. Futility determinations should be multidisciplinary and follow institutional policies, as unilateral decisions by a single provider are ethically problematic. Recognizing and addressing implicit biases that may affect surgical referral and decision-making for underrepresented populations is an ongoing professional responsibility.

## References

1. Bernacki RE, Block SD. Communication About Serious Illness Care Goals: A Review and Synthesis of Best Practices. *JAMA Intern Med*. 2014;174(12):1994-2003.
2. Scheunemann LP, White DB. The Ethics and Reality of Rationing in Medicine. *Chest*. 2011;140(6):1625-1632.
3. Schwarze ML, Brasel KJ, Mosenthal AC. Beyond 30-Day Mortality: Aligning Surgical Quality With Outcomes That Patients Value. *JAMA Surg*. 2014;149(7):631-632.
4. Boss RD, Urban A, Barnett MD, Arnold RM. Neonatal Critical Care Communication (NC3): Training NICU Physicians and Nurse Practitioners. *J Perinatol*. 2013;33(8):642-646.