Duty to the Patient. Duty to the Public. Duty under the Law

Background

Mobitz type II atrioventricular (AV) block is a high-risk conduction abnormality with potential progression to complete heart block, syncope, and sudden cardiac death. Management becomes particularly challenging when a patient refuses recommended care despite substantial risk of serious harm. Such cases require clinicians to balance respect for patient autonomy with the duty to prevent harm, while also considering public safety and applicable legal requirements.

Case Presentation

A male patient with recurrent syncope presented with symptomatic bradycardia and 2:1 AV conduction consistent with Mobitz type II AV block. Given the risk of progression to complete heart block and recurrent syncope, urgent permanent pacing was recommended. Despite extensive counseling regarding the risk of sudden deterioration, injury, and death, the patient initially declined intervention and left the emergency department against medical advice. Because recurrent syncope and significant bradyarrhythmia posed a potential risk to the patient and others if he continued driving, the care team evaluated his decision-making capacity, provided detailed counseling regarding the risks of refusing treatment and driving, and addressed concerns regarding medically unsafe driving in accordance with applicable Florida law. The patient subsequently returned for continued care and underwent permanent pacemaker implantation without reported complication.

Findings

This case demonstrates the clinical and ethical complexity of symptomatic high-grade conduction disease when a patient initially refuses definitive therapy. The patient's recurrent syncope, symptomatic bradycardia, and 2:1 Mobitz type II AV block represented a substantial risk for progression to complete heart block and sudden cardiac death. Assessment of decision-making capacity was essential to distinguish an informed refusal from refusal occurring in the setting of impaired capacity. Following further counseling and return to care, permanent pacemaker placement provided definitive treatment and reduced the immediate risk associated with the conduction abnormality.

Discussion & Conclusion

Symptomatic Mobitz type II AV block warrants urgent evaluation for permanent pacing because of the risk of progression to complete heart block and serious adverse outcomes. When patients refuse potentially lifesaving treatment, clinicians must respect autonomy while carefully assessing decision-making capacity, communicating risks and alternatives, documenting informed refusal, and taking reasonable steps to reduce preventable harm. Driving restrictions and reporting obligations introduce an additional public-safety dimension that varies by jurisdiction. In Florida, applicable statutes provide legal frameworks addressing emergency treatment and confidential reporting of medically unsafe drivers. This case emphasizes that management of life-threatening bradyarrhythmias extends beyond the clinical indication for pacing and requires integration of evidence-based cardiology, ethical principles, capacity assessment, clear documentation, and state-specific legal considerations.