The two-tier safety net: subacute pericarditis and the ethics of diagnostic access in Aotearoa New Zealand

Subacute pericarditis presents a distinct clinical challenge because its gradual onset can mask progression to cardiac tamponade. In Aotearoa New Zealand, public health services meet international safety guidelines for follow-up imaging, yet geographic location and access to private medical insurance generate variations in diagnostic turnaround. We present the case of a 55-year-old male presenting with a large pericardial effusion (22 mm). Although public follow-up occurred within the recommended three-month safety window, private insurance in a metropolitan centre enabled echocardiographic confirmation of effusion resolution at three weeks. Large effusions (>20 mm) carry higher baseline risks of delayed complications, creating a structural reliance on intermediate outpatient surveillance. Where private insurance provides rapid confirmation, individuals residing in rural areas or lacking private insurance face extended waitlists without an intermediate diagnostic buffer, relying on primary care red-flag triage to identify acute deterioration. To address these structural gaps, we evaluate workforce expansion, specialist retention, and community-based diagnostics as pathways to improve regional access across Aotearoa New Zealand.