Antagonism in patients with congestive heart failure Tumour necrosis factor(Tnf)Is a proinflammatory cytokine that is produced by the heart under certain forms of stress. btsbydrdrebtbox Patients with advanced heart failure have increased levels of circulating tnf1 but more importantly, tnf can produce left ventricular remodelling, pulmonary oedema and cardiomyopathy in human subjects.2 With respect to heart failure had progressively higher circulating tnf levels.5 Thirdly, TNF is elaborated in the failing heart in response to pressure or volume overload, physiological stimuli for TNF Production in heart failure patients.6 And finally, strong experimental support comes from the observations that transgenic mice overexpressing TNF in cardiac Tissue develop dilated cardiomyopathy and die prematurely.In this review, we will discuss the human and experimental evidence That supports a causative role of tnf in heart failure and discuss the clinical implications of tnf antagonism in patients With congestive heart failure. Two important clinical observations led to the initial investigations of the role of tnf in cardiac function.Firstly, as Tnf was a mediator of cachexia and patients with advanced heart failure manifest profound metabolic abnormalities and the Syndrome of cachexia, it was reasonable to suggest that tnf may be increased in patients with advanced heart beats by dre outlet uk failure.Indeed, The initial report on patients with advanced heart failure demonstrated that approximately 3040% of patients with advanced Heart failure have increased circulating tnf levels.1 Secondly, it has long been recognised that patients with advanced sepsis, a condition characterised by increased cytokine Production and in particular tnf, may develop reversible cardiac dysfunction.7Accordingly, the hypothesis was put forth that TNF may contribute to contractile abnormalities of failing myocardium. After those initial clinical observations, a number of experimental reports demonstrated that tnf is produced by myocytes8 and that it is capable of inducing negative inotropic effects in vivo and in vitro.911 But more interestingly, transgenic mice that overexpress TNF develop hypertrophy, cardiomyopathy and die prematurely consistent With the hypothesis that increased cardiac concentrations of tnf are sufficient to induce the failing phenotype.Clearly, The experimental observations of the effects of tnf on cardiac function indicate that tnf may be an important mediator of Cardiac injury in heart failure patients. The initial experimental reports demonstrated that tnf can be produced by isolated myocytes or the intact heart when perfused With lipopolysacharide(Lps), a well known stimuli for TNF production12 The ability of LPS to induce TNF production in the heart is important because it establishes the ability of myocardium to Produce tnf;However, if tnf is clinically important haemodynamic stimuli like pressure or volume overload should be capable Of stimulating tnf production.Indeed, isolated feline hearts beats by dre outlet store perfused in a langendorff apparatus produced tnf in response To either pressure or volume overload.6 These data, taken together demonstrated that adult myocardium can produce TNF in vivo and provided the basis to support The concept that haemodynamic loading conditions may lead to production of myocardial tnf in heart failure patients. Perhaps the most important observation that supports the hypothesis that overproduction of tnf is detrimental to the heart Was the demonstration that tnf is present in failing but not in nonfailing myocardium.Figure 1 shows intracardaic tnf levels in normal(N=4)And failing human heart(N=4).As clearly shown, tnf expression is absent

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