1. Effects of Renal Sympathetic Denervation in Renal Artery Diameter Evaluated By Quantitative Angiography
- Author
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Alexandre Abizaid, Flávio A. O. Borelli, Luciana Armaganijan, Celso Amodeo, Dalmo Antonio Ribeiro Moreira, Rodolfo Staico, Amanda G. M. R. Sousa, and Márcio Gonçalves de Sousa
- Subjects
medicine.medical_specialty ,Percutaneous ,Ablação por cateter ,medicine.medical_treatment ,Urology ,urologic and male genital diseases ,Refractory ,Internal medicine ,medicine.artery ,Renal artery ,medicine ,Right Renal Artery ,Angiografia ,Sympathectomy ,Resistência a medicamentos ,medicine.diagnostic_test ,business.industry ,Angiography ,General Medicine ,Clinical trial ,Renal sympathetic denervation ,Anesthesia ,Renal blood flow ,Drug resistance ,Hypertension ,Cardiology ,Catheter ablation ,medicine.symptom ,Artéria renal ,Cardiology and Cardiovascular Medicine ,business ,Simpatectomia ,Vasoconstriction ,Hipertensão - Abstract
Background Percutaneous renal sympathetic denervation was developed as an adjunct method to treat clinical conditions associated to sympathetic hyperactivity. Percutaneous renal sympathetic denervation increases the renal blood flow and reduces vasoconstriction. The effects of percutaneous renal sympathetic denervation in renal artery diameter have not been reported. Our objective was to evaluate such effects by quantitative angiography. Methods Prospective, observational, study including consecutive patients undergoing percutaneous renal sympathetic denervation. Results Thirty-one patients were selected, 21 were submitted to percutaneous renal sympathetic denervation to control resistant arterial hypertension and 10 to control refractory ventricular arrhythmias. Seventeen patients did not perform renal arteriography in the follow-up due to clinical contraindications or because they did not complete the 6-month period established by the protocol. In addition, one patient performed a unilateral percutaneous renal sympathetic denervation and was also excluded from this analysis. Therefore, 52 renal angiographies (26 pairs) of 13 patients were analyzed. Mean maximal diameter of the right renal artery before the procedure was 4.54 ± 0.21 mm and increased to 5.2 ± 0.44 mm at 6 months ( p = 0.01). Likewise, there was a significant increase in the diameter of the left renal artery at 6 months of follow-up, increasing from 4.37 ± 0.42 to 5.23 ± 0.77 mm ( p = 0.02). Conclusions The results of this analysis illustrate the significant increment in renal artery diameter after percutaneous renal sympathetic denervation. Randomized controlled clinical trials are required to consolidate our observations. RESUMO Efeitos da Denervacao Simpatica Renal no Diâmetro da Arteria Renal Avaliados Pela Angiografia Quantitativa Introducao A denervacao simpatica renal percutânea surgiu como metodo adjunto no controle de condicoes clinicas as- sociadas a hiperatividade simpatica. Ela resulta em aumento do fluxo sanguineo renal e em reducao da vasoconstricao. Os efeitos da denervacao simpatica renal percutânea no diâmetro da arteria renal ainda nao foram descritos. Nosso objetivo foi avaliar tais efeitos por meio da angiografia quantitativa. Metodos: Estudo prospectivo e observacional que incluiu pacientes consecutivos submetidos a denervacao simpatica renal percutânea. Resultados Selecionamos 31 pacientes, sendo 21 submetidos a denervacao simpatica renal percutânea para controle da hipertensao arterial resistente e 10 para controle de arritmias ventriculares refratarias. Dezessete pacientes nao realizaram arteriografia renal no seguimento por nao completarem o periodo protocolar de 6 meses, ou por contraindicacao clinica. Adicionalmente, uma paciente realizou denervacao simpatica renal percutânea unilateral, sendo tambem excluida desta analise. Assim, 52 angiografias renais (26 pares) de 13 pacientes foram analisadas. A media do diâmetro maximo da arteria renal direita, antes do procedimento, foi de 4,54 ± 0,21 mm e aumentou para 5,2 ± 0,44 mm aos 6 meses ( p = 0,01). Da mesma forma, observou-se aumento significativo do diâmetro da arteria renal esquerda aos 6 meses de seguimento, ampliando de 4,37 ± 0,42 para 5,23 ± 0,77 mm ( p = 0,02). Conclusoes Os resultados desta analise ilustram o incremento significativo dos diametros das arterias renais apos denervacao simpatica renal percutânea. Ensaios clinicos randomizados e controlados sao necessarios para consolidar nossas observacoes.
- Published
- 2014