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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Cardiovasc+Pharmacol
2009 ; 54
(4
): 279-86
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A novel mechanism for the treatment of angina, arrhythmias, and diastolic
dysfunction: inhibition of late I(Na) using ranolazine
#MMPMID19333133
Maier LS
J Cardiovasc Pharmacol
2009[Oct]; 54
(4
): 279-86
PMID19333133
show ga
Inhibition of the persistent or late Na current (INa) using ranolazine (Ranexa)
represents a novel mechanism of action that was approved in the United States in
2006 and only recently in the European Union for use in patients with stable
angina pectoris. In general, myocardial ischemia is associated with reduced
adenosine triphosphate fluxes and decreased energy supply, resulting in severe
disturbances of intracellular ion homeostasis in cardiac myocytes. In the recent
years, increased late INa was suggested to contribute to this phenomenon by
elevating intracellular Na concentration with subsequent rise in diastolic Ca
levels by means of the sarcolemmal Na-Ca exchange system. Ranolazine, a specific
inhibitor of late INa, reduces Na influx and hence ameliorates disturbed Na and
Ca homeostasis. This is associated with a symptomatic improvement of angina in
patients unlike other antianginal drugs without affecting heart rate or systemic
blood pressure as shown in placebo-controlled studies. Therefore, ranolazine is a
useful new option for patients with chronic stable angina not only as an add-on
therapy. New clinical and experimental studies even point to potential
antiarrhythmic effects, beneficial effects in diastolic heart failure, and under
hyperglycemic conditions. In the present article, the relevant pathophysiological
concepts for the role of late INa inhibition are reviewed and the most recent
data from basic studies and clinical trials are summarized.
|Acetanilides/administration & dosage/pharmacology/*therapeutic use
[MESH]