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Europace ; 20(9): 1498-1505, 2018 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-29182757

RESUMO

Aims: Changes in the anatomical relationship between left phrenic nerve and coronary veins may occur due to the reverse remodelling observed in super-responders to cardiac resynchronization therapy (CRT) and might be the underlying mechanism in patients developing late-onset phrenic nerve stimulation (PNS) without evidence of lead dislodgement (LD). In this study, we sought to evaluate the role of super-response (SR) to CRT as a potential predictor of late-onset PNS. Methods and results: Consecutive patients implanted with a left ventricular (LV) lead in a single centre were retrospectively analysed. Phrenic nerve stimulation was classified as 'early' when it occurred within 3 months of implantation and 'late' for occurrences thereafter. 'Late' PNS was considered related to LD (LD-PNS) when LV threshold differed by > 1 V or impedance >250 Ω from baseline values or in case of radiological displacement. Cases not meeting the former criteria were classified as 'non-LD-PNS'. Super-response was defined as a decrease ≥30% of the left ventricluar end-systolic volume at 1-year echocardiography. At 32 ± 7 months follow-up, PNS occurred in 20 of 139 patients. Late non-LD-PNS incidence was significantly higher in the SR group (8/61; 13.1%) when compared with the non-SR (1/78; 1.3%) (P = 0.010). Super-response remained the only predictor of non-LD-PNS at multivariate analysis (odds ratio: 11.62, 95% confidence interval 1.41-95.68, P = 0.023). Conclusion: Incidence of late non-LD-PNS is higher among SR to CRT, suggesting a potential role of the changes in the anatomical relationship between left phrenic nerve and coronary veins.


Assuntos
Arritmias Cardíacas/terapia , Terapia de Ressincronização Cardíaca/efeitos adversos , Insuficiência Cardíaca/terapia , Doenças do Sistema Nervoso Periférico/epidemiologia , Nervo Frênico , Complicações Pós-Operatórias/epidemiologia , Remodelação Ventricular , Idoso , Arritmias Cardíacas/diagnóstico por imagem , Medicamentos Biossimilares , Terapia de Ressincronização Cardíaca/métodos , Ecocardiografia , Feminino , Insuficiência Cardíaca/diagnóstico por imagem , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Doenças do Sistema Nervoso Periférico/etiologia , Complicações Pós-Operatórias/etiologia , Prognóstico , Implantação de Prótese , Estudos Retrospectivos , Volume Sistólico , Resultado do Tratamento
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