Katz A M
Department of Medicine, University of Connecticut, Farmington 06032.
Cardiovasc Drugs Ther. 1989 Jan;2(6):747-50. doi: 10.1007/BF00133203.
The myocardium in the patient with congestive heart failure is abnormal and probably unable to generate sufficient chemical energy to meet the heart's mechanical needs. Such a condition of "energy starvation" would have several important implications; among these is that inotropic stimulation, by increasing energy utilization, could accelerate the progressive death of myocardial cells that characterizes end-stage heart failure. An important goal of therapy in these patients, therefore, is to reduce cardiac energy expenditure. This can be accomplished by unloading the failing heart, which has already been shown to prolong survival in patients with severe congestive heart failure. Slowing the progressive death of myocardial cells may also be accomplished by the administration of negative, rather than positive, inotropic drugs.
充血性心力衰竭患者的心肌是异常的,可能无法产生足够的化学能来满足心脏的机械需求。这种“能量饥饿”状态会有几个重要影响;其中之一是,正性肌力刺激通过增加能量利用,可能会加速心肌细胞的进行性死亡,而这是终末期心力衰竭的特征。因此,这些患者治疗的一个重要目标是减少心脏能量消耗。这可以通过减轻衰竭心脏的负担来实现,这已被证明可延长重度充血性心力衰竭患者的生存期。给予负性而非正性肌力药物也可能减缓心肌细胞的进行性死亡。