Myocardial perfusion scintigraphy in the assessment of cardiovascular risk in adult liver transplantation

Abstract

Introduction

The non-invasive diagnostic study of cardiovascular risk in patients who are going to undergo liver transplantation is not clear, especially in asymptomatic patients. Regarding myocardial perfusion scintigraphy (MPS), it has been thought that the impaired vasodilator reserve in these patients may reduce its performance. The objective is to assess the role of the MPS in the pre-surgical evaluation of patients who are going to undergo liver transplantation.

Material and methods

Retrospective, descriptive and observational study was designed. All adult patients undergoing liver transplantation between 2017 and 2021 who had previous MPS were included. The findings of MPS were described and correlated with the findings of invasive angiography and with the appearance or not of peri- and post-transplant cardiovascular events.

Results

There were a total of 188 transplanted patients (mean age: 57 years, SD: 12), 178 had previous myocardial perfusion, 82 (46%) patients had no cardiovascular risk factors, and 5 (2.8%) had a history of coronary disease.

Of the MPS, 177 were with dipyridamole stress performed on average 10 months before transplantation. Only 17/178 (9.5%) studies were abnormal. The mean follow-up was 38 months (SD: 10). Of the patients with normal MPS, only 2 (1.2%) presented cardiovascular events, both with studies performed more than 2 years before the procedure. There were no deaths of cardiovascular origin.

Conclusions

MPS is a safe and reliable technique for cardiovascular assessment of patients who are candidates for liver transplantation, given the low rate of false negatives during follow-up.

Resumen

Introducción

El estudio diagnóstico no invasivo del riesgo cardiovascular en pacientes que van a ser llevados a trasplante hepático no es claro especialmente en asintomáticos. Respecto a la gammagrafía de perfusión miocárdica (GPM) se ha pensado que la reserva vasodilatadora deteriorada en estos pacientes puede reducir su rendimiento. El objetivo es valorar el papel de la GPM en la evaluación prequirúrgica de los pacientes que van a ser tratados mediante un trasplante hepático.

Material y métodos

Estudio retrospectivo, descriptivo y observacional. Se incluyó a todos los pacientes adultos llevados a trasplante hepático entre 2017 y 2021 que tuvieran GPM previa. Se describen los hallazgos de la GPM y se correlacionaron con los hallazgos de angiografía invasiva y con la aparición o no de eventos cardiovasculares peri y postrasplante.

Resultados

De 188 pacientes trasplantados (edad promedio: 57 años, DE: 12), 178 tenían perfusión miocárdica previa, 82 (46%) pacientes no tenían factores de riesgo cardiovascular y 5 (2,8%) tenían antecedente de enfermedad coronaria.

De las GPM, 177 fueron con estrés con dipiridamol realizadas en promedio 10 meses antes del trasplante. Únicamente 17/178 (9,5%) estudios fueron anormales. El seguimiento medio fue de 38 meses (DE: 10). De los pacientes con GPM normal, solo 2 (1,2%) presentaron eventos cardiovasculares, ambos con estudios realizados más de 2 años atrás. No hubo muertes de origen cardiovascular.

Conclusiones

La GPM es una técnica segura y confiable en la valoración cardiovascular en pacientes candidatos a trasplante hepático dada la baja tasa de falsos negativos en el seguimiento.