Anesthesia Clinical Trial
Official title:
Cardioprotective Effect of Ketamine-dexmeditomidine Versus Fentanyl-midazolam in Open-heart Surgery in Pediatrics: A Randomized Controlled Double-blinded Study
congenital hearts are very sensitive and irritable to deal with, especially during repair defects, the child's heart is exposed to impaired myocardial function during the entire procedure. Moreover, reperfusion of the heart during open-heart surgery when the myocardium is exposed to a global ischaemic cardioplegic arrest can induce myocardial injury. Myocardial reperfusion injury activates neutrophils, which trigger an inflammatory response resulting in the generation of reactive oxygen species (ROS), cytokine release, and complement activation, which further induce more cardiac injury. In addition to the inflammatory response generated as a result of tissue reperfusion injury, there is a significant systemic inflammatory response that is triggered by cardiopulmonary bypass (CPB) during open-heart surgery
Myocardial protection is an important issue. This is reflected in the clinical prognosis of patients undergoing cardiac surgery and this can be measured by the most popular Cardiac biomarkers ( cardiac troponin I (cTnI)). (2) A large number of anesthetic agents have been implicated in protecting the heart against ischemia and reperfusion injury. Ketamine has an anti-inflammatory effect and has been shown to reduce ROS generation by neutrophils and to decrease endotoxin stimulated IL6 production in human whole blood although it does not impair neutrophil function. (3) Dexmedetomidine is a highly selective, short-acting, central α2-adrenergic agonist with intense sympatholytic qualities. Dexmedetomidine has been increasingly used as a component of general anesthesia, including cardiac surgical applications due to its sedative/hypnotic and analgesic effects which are enhanced by its cardioprotective properties. (4) Riha et.al showed that ketamine - Dexmedetomidine combination had superior cardioprotective effects as measured by cardiac markers as compared to sevoflurane- sufentanil anesthesia after cardiac surgery. (5) Midazolam is known to have potential anti-inflammatory effects and antioxidant activity. They have been proven to provide protective effects for patients who underwent cardiac surgery. (6) Fentanyl is one opioid that has been closely linked to inflammatory mediators and myocardial protection. It reduces the CPB-induced inflammatory response and ischaemic reperfusion injury during cardiac surgery. These effects are related to improvement in intracellular Ca2+ mobilization and do not seem to be related to the adhesion of neutrophils in the coronary system. (7) To the best of our knowledge, this is the first study comparing the combined effect of Ketamine- Dexmedetomidine versus fentanyl- midazolam against ischemia and reperfusion injury in pediatric congenital heart surgery repair. ;
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