efeitos sedativos e cardiovasculares do midazolam e do diazepam, associados ou não a clonidina, em pacientes submetidos a estudos hemodinâmicos por suspeita de doença arterial coronariana sedative and cardiovascular effects of midazolam and diazepam alone or combined with clonidine in patients undergoing hemodynamic studies for suspected coronary artery disease

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ID: 232696
2007
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Abstract
FUNDAMENTO: A sedação durante a cineangiocoronariografia tem sido pouco estudada e saber qual é a melhor droga para sedar esses pacientes é um questionamento importante. OBJETIVO: Avaliar a qualidade da sedação e os efeitos sobre a freqüência cardíaca (FC) e a pressão arterial (PA) do midazolam e do diazepam, associados ou não a clonidina, em pacientes com suspeita de doença coronariana. MÉTODOS: Foi desenvolvido ensaio clínico prospectivo, duplo-cego, randomizado, controlado, com 160 pacientes divididos em cinco grupos de 32 pacientes cada, de acordo com o fármaco utilizado: grupo C (clonidina 0,5 µg/kg); grupo M (midazolam 40 µg/kg); grupo MC (associação de midazolam 40 µg/kg e clonidina 0,5 µg/kg); grupo D (diazepam 40 µg.kg); e grupo DC (associação de diazepam 40 µg/kg e clonidina 0,5 µg/kg). A sedação foi avaliada com base na escala de Ramsay e no consumo de meperidina 0,04 mg.kg-1. A PA invasiva, a FC e o escore de sedação foram analisados a cada cinco minutos em quatro diferentes momentos. RESULTADOS: Os pacientes que utilizaram midazolam apresentaram maiores escores de sedação e variação da FC e da PA (p < 0,05). Os que utilizaram diazepam ou clonidina tiveram menores escores de sedação e mais satisfatórios para a realização do exame e apresentaram menor variação da PA e da FC (p > 0,05). CONCLUSÃO: O midazolam foi associado a maior efeito sedativo e cardiovascular enquanto o diazepam causou menor efeito sedativo e cardiovascular. A clonidina e o diazepam tiveram efeitos semelhantes na PA, na FC e na sedação.
BACKGROUND: Sedation during coronary angiography has been rarely studied, and it is important to know which drug is the best to sedate these patients. OBJECTIVE: To evaluate the quality of sedation and the effects of midazolam and diazepam alone or combined with clonidine on the heart rate (HR) and blood pressure (BP) of patients with suspected coronary artery disease. METHODS: This is a controlled, randomized, double-blind, prospective clinical study of 160 patients divided into five groups of 32 patients each, according to the drug used: group C (clonidine 0.5 µg/kg); group M (midazolam 40 µg/kg); group MC (combination of midazolam 40 µg/kg and clonidine 0.5 µg/kg); group D (diazepam 40 µg/kg); and group DC (combination of diazepam 40 µg/kg and clonidine 0.5 µg/kg). Sedation was evaluated based on the Ramsay scale and on the use of meperidine 0.04 mg.kg-1. Invasive BP monitoring, HR and the sedation score were analyzed every five minutes at four different time points. RESULTS: Patients who received midazolam presented higher sedation scores as well as HR and BP variation (p < 0.05). Those who received diazepam or clonidine had lower sedation scores, which were more satisfactory for the performance of the procedure, and presented a lower BP and HR variation (p > 0.05). CONCLUSION: Midazolam was associated with a greater sedative and cardiovascular effect, whereas for diazepam these effects were less intense. Clonidine and diazepam had similar effects on BP, HR and sedation.
Reference Key
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Authors ;Jedson dos Santos Nascimento;Norma Sueli Pinheiro Modolo;Roberto Cruz Rocha Silva;Kleber Pimentel Santos;Heitor Ghissoni de Carvalho
Journal revista cubana de ciencias informáticas
Year 2007
DOI
10.1590/S0066-782X2007001800009
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0066-782X2007001800009
Keywords
diazepam midazolam clonidine counscious sedationdiseases of the circulatory (cardiovascular) system

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