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Functional pulmonary regurgitation — Clinical Guidelines

Overview

Functional pulmonary regurgitation (PR) involves the backflow of blood from the pulmonary artery into the right ventricle (RV) due to valve incompetence, often seen post-repair of congenital heart defects like tetralogy of Fallot. It can lead to RV dilation and dysfunction if not managed effectively 1 4.

Diagnosis

Echocardiography: Essential for assessing RV size, function, and PR severity (graded by velocity and volume criteria) 1 3.

Cardiac MRI: Provides detailed assessment of RV volumes and function 2.

Tissue-Doppler Echocardiography: Useful for evaluating regional RV function 3.

NT-proBNP Levels: May help in monitoring disease severity and response to intervention 2.

Management

Transcatheter Pulmonary Valve Replacement (TPVR): Effective for significant PR, with favorable mid-term outcomes, especially in non-pyramidal RVOT anatomy 1.

Valve Selection: Consider specific valve types like Venus P-valve based on patient anatomy and procedural feasibility 2.

Monitoring: Regular echocardiographic follow-up to assess valve function and RV adaptation 1 2.

Special Populations

Pediatrics: TPVR shows high procedural success rates and promising reductions in RV volume 2.

Elderly/Comorbidities: Limited specific data; focus on comprehensive risk assessment before TPVR 1 2.

Key Recommendations

Consider TPVR for significant functional PR, particularly in patients without pyramidal RVOT anatomy, to achieve optimal mid-term outcomes (Evidence: Moderate 1).

Utilize echocardiography and cardiac MRI for comprehensive pre- and post-intervention assessment of RV function and PR severity (Evidence: Moderate 1 2).

Monitor NT-proBNP levels alongside echocardiographic parameters to refine management and assess response to TPVR (Evidence: Weak 2).

References

1 Zhu W, Xia Z, Chan JSK, Wan J, Xu L, Li Y et al.. Feasibility of Self-Expanding Transcatheter Pulmonary Valves in Patients with Pyramidal RVOT: Favorable Mid-term Outcomes. Pediatric cardiology 2026. link 2 Lin MT, Chen CA, Chen SJ, Chiu SN, Lu CW, Wu MH et al.. Prognostic markers in patients undergoing transcatheter implantation of Venus P-valve: Experience in Taiwan. Journal of the Formosan Medical Association = Taiwan yi zhi 2021. link 3 Kjaergaard J, Iversen KK, Vejlstrup NG, Smith J, Bonhoeffer P, Søndergaard L et al.. Impacts of acute severe pulmonary regurgitation on right ventricular geometry and contractility assessed by tissue-Doppler echocardiography. European journal of echocardiography : the journal of the Working Group on Echocardiography of the European Society of Cardiology 2010. link 4 Kilner PJ, Balossino R, Dubini G, Babu-Narayan SV, Taylor AM, Pennati G et al.. Pulmonary regurgitation: the effects of varying pulmonary artery compliance, and of increased resistance proximal or distal to the compliance. International journal of cardiology 2009. link

Functional pulmonary regurgitation