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Isosorbide dinitrate

CAS# 87-33-2

Isosorbide dinitrate

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Chemical structure

Isosorbide dinitrate

3D structure

Chemical Properties of Isosorbide dinitrate

Cas No. 87-33-2 SDF Download SDF
PubChem ID 6883 Appearance Powder
Formula C6H8N2O8 M.Wt 236
Type of Compound N/A Storage Desiccate at -20°C
Solubility DMSO : ≥ 250 mg/mL (1058.69 mM)
*"≥" means soluble, but saturation unknown.
Chemical Name [(3S,3aS,6R,6aS)-3-nitrooxy-2,3,3a,5,6,6a-hexahydrofuro[3,2-b]furan-6-yl] nitrate
SMILES C1C(C2C(O1)C(CO2)O[N+](=O)[O-])O[N+](=O)[O-]
Standard InChIKey MOYKHGMNXAOIAT-JGWLITMVSA-N
Standard InChI InChI=1S/C6H8N2O8/c9-7(10)15-3-1-13-6-4(16-8(11)12)2-14-5(3)6/h3-6H,1-2H2/t3-,4+,5-,6-/m1/s1
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months.
Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it.
About Packaging 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial.
2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial.
3. Try to avoid loss or contamination during the experiment.
Shipping Condition Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request.

Isosorbide dinitrate Dilution Calculator

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Preparing Stock Solutions of Isosorbide dinitrate

1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 4.2373 mL 21.1864 mL 42.3729 mL 84.7458 mL 105.9322 mL
5 mM 0.8475 mL 4.2373 mL 8.4746 mL 16.9492 mL 21.1864 mL
10 mM 0.4237 mL 2.1186 mL 4.2373 mL 8.4746 mL 10.5932 mL
50 mM 0.0847 mL 0.4237 mL 0.8475 mL 1.6949 mL 2.1186 mL
100 mM 0.0424 mL 0.2119 mL 0.4237 mL 0.8475 mL 1.0593 mL
* Note: If you are in the process of experiment, it's necessary to make the dilution ratios of the samples. The dilution data above is only for reference. Normally, it's can get a better solubility within lower of Concentrations.

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References on Isosorbide dinitrate

Underuse of hydralazine and isosorbide dinitrate for heart failure in patients of African ancestry: a cross-European survey.[Pubmed:30892835]

ESC Heart Fail. 2019 Mar 20.

AIMS: Population data indicate that one in 25 persons of African ancestry has heart failure, a condition with relatively high mortality of around 50% in 5 years. Combined hydralazine and Isosorbide dinitrate added to conventional therapy in African ancestry patients with heart failure and reduced ejection fraction improves quality of life and reduces the rate of first hospitalization for heart failure by 33% and annual mortality by 43%. The objectives of this study were to quantify the use of this guideline-recommended therapy in Europe and the potential effect of implementation gaps on mortality. METHODS AND RESULTS: Prescription drug registration and utilization databases and population statistics were analysed in a cross-European survey without language restriction. Main outcomes were the number of unique patients prescribed the fixed combination hydralazine-Isosorbide dinitrate (primary) or both drugs (secondary) in Europe in 2015, and the excess mortality related to prescribing practices was estimated. The survey indicates that around 12 million persons of African ancestry live in Europe. It is estimated that 480 000 persons of this population group have heart failure, with 120 000 eligible for hydralazine and Isosorbide dinitrate therapy. However, single-pill hydralazine-Isosorbide dinitrate is not authorized and therefore not dispensed in Europe in 2015. Out of the 25 European nations surveyed, the UK and the Netherlands are the only countries with major African ancestry populations where both hydralazine and Isosorbide dinitrate are available for oral use, aside Norway, Sweden, and Finland. Hydralazine and Isosorbide dinitrate are prescribed to <500 European patients in 2015. Thus, despite the recommendations of the European Society of Cardiology, the large majority of African-European patients with heart failure do not receive this drug combination, potentially resulting in 4800 to 5800 excess deaths yearly. CONCLUSIONS: The life-saving, guideline-recommended, adjunctive therapy for heart failure in African ancestry patients with hydralazine and Isosorbide dinitrate is rarely used in Europe. This major evidence-practice gap should urgently be overcome to reduce excess mortality in African-European patients with heart failure.

Cardioprotective Effect of Isosorbide Dinitrate Postconditioning Against Rat Myocardial Ischemia-Reperfusion Injury In Vivo.[Pubmed:30825410]

Med Sci Monit. 2019 Mar 2;25:1629-1636.

BACKGROUND This study investigated the cardioprotective effect of Isosorbide dinitrate (ISDN) postconditioning against rat myocardial ischemia/reperfusion injury in vivo and provided a theoretical basis for clinical application. MATERIAL AND METHODS We randomly divided 32 Wistar rats into 4 groups: sham group, I/R (ischemia/reperfusion) group, I-PostC group (with 3 cycles of 30 s reperfusion and 30 s reocclusion applied at the onset of reperfusion), and P-PostC group (nitrate postconditioning: Isosorbide dinitrate (5mg/kg) was given 1 min before reperfusion). The left anterior descending artery (LAD) was occluded for 40 min, followed by a 180-min reperfusion. Relevant indicators were tested. The LAD was occluded again, then we determined the myocardial infarct size. Paraffinized sections were prepared and TUNEL detection was performed. RESULTS There were no significant differences in ischemic sizes between different groups. Compared with the I/R group, the levels of cTnI and myocardial infarct size in the I-PostC group and P-PostC group were significantly decreased (p<0.05). However, there were no significant difference between the I-PostC group and P-PostC group. Compared with the sham-operated group, the levels of cTnI and MDA in the I/R group, I-PostC group, and P-PostC group were significantly increased (p<0.05) and the levels of SOD were significantly decreased (p<0.05). Compared with the I/R group, I-PostC and P-PostC decreased the level of MDA and increased the level of SOD (both P<0.05). CONCLUSIONS ISDN postconditioning induces a similar cardioprotective effect as I-PostC. The potential mechanisms of cardioprotection of ISDN postconditioning might be via improvement of myocardial antioxidant capacity and reduced generation of reactive oxygen species.

Combination of Diclofenac and Sublingual Nitrates Is Superior to Diclofenac Alone in Preventing Pancreatitis After Endoscopic Retrograde Cholangiopancreatography.[Pubmed:30772342]

Gastroenterology. 2019 Feb 14. pii: S0016-5085(19)30376-2.

BACKGROUND & AIMS: Acute pancreatitis is a major adverse event of endoscopic retrograde cholangiopancreatography (ERCP). Rectal administration of nonsteroidal anti-inflammatory drugs (NSAIDs) decreases the incidence of post-ERCP pancreatitis (PEP). Little is known about the combined effects of sublingual nitrate and NSAIDs. We performed a randomized trial to assess whether the combination of NSAIDs and sublingual nitrate is more effective than NSAIDs alone in preventing PEP. METHODS: In a prospective superiority trial, eligible patients underwent ERCP at 12 endoscopic units in Japan, from March 2015 through May 2018. Patients were randomly assigned to groups given diclofenac suppositories (50 mg) within 15 minutes after the endoscopic procedure alone (diclofenac-alone group, n = 442) or in combination with sublingual Isosorbide dinitrate (5 mg) 5 minutes before the endoscopic procedure (combination group, n = 444). The primary endpoint was the occurrence of PEP. RESULTS: PEP developed in 25 patients in the combination group (5.6%), and in 42 patients in the diclofenac-alone group (9.5%) (relative risk 0.59; 95% confidence interval 0.37-0.95; P = .03). Moderate to severe pancreatitis developed in 4 patients (0.9%) in the combination group, and 10 patients (2.3%) in the diclofenac-alone group (relative risk 0.12; 95% confidence interval 0.13-1.26; P = .12). There was no serious adverse event related to the additional administration of sublingual nitrate. CONCLUSIONS: In a randomized controlled trial, we found that prophylaxis with rectal diclofenac and sublingual nitrate significantly reduces the overall incidence of PEP compared with diclofenac suppository alone. ClinicalTrials.gov, no: UMIN 000016274.

Permeation-enhancing effects and mechanisms of O-acylterpineol on isosorbide dinitrate: mechanistic insights based on ATR-FTIR spectroscopy, molecular modeling, and CLSM images.[Pubmed:30744434]

Drug Deliv. 2019 Dec;26(1):107-119.

The present study aimed to evaluate the penetration activity of O-acylterpineol derivatives both in vitro and in vivo, and to investigate the enhancing mechanism of O-acylterpineol derivatives which were synthesized by alpha-terpineol and fatty acid. The promoting activities on the Isosorbide dinitrate patch were tested across full thickness rabbit skin both in vitro and in vivo. In order to elucidate the permeation mechanism, attenuated total reflection Fourier transform infrared spectroscopy, molecular modeling, and confocal laser scanning microscopy were introduced to investigate the regulation of enhancers in the skin permeability and biophysical properties. With in vitro cytotoxicity test and in vivo erythema model, the skin irritation of enhancers was also evaluated. Permeation studies showed 2-(4-methylcyclohex-3-en-l-yl) propan-2-yl tetradecanoate produced the obvious enhancement activity for ISDN both in vitro and in vivo from patches. These results were supported by ATR-FTIR, molecular modeling, and CLSM studies which revealed that O-acylterpineol could decrease the order of the alkyl chains in the skin lipids. Additionally, it was found that TER-C14 produced a relatively low skin irritation, compared with the TER which was assumed to be a safe compound. The present research suggested that some newly designed acylterpineol derivatives are shown to be suitable permeation enhancers for transdermal drug delivery, and the chain length of C14 seem to be safe and more favorable for the penetration of ISDN from DIA patches.

Design, Synthesis and Biological Evaluation of Nitrate Derivatives of Sauropunol A and B as Potent Vasodilatory Agents.[Pubmed:30736379]

Molecules. 2019 Feb 6;24(3). pii: molecules24030583.

A group of nitrate derivatives of naturally occurring sauropunol A and B were designed and synthesized. Nitric oxide (NO) releasing capacity and vasodilatory capacity studies were performed to explore the structure-activity relationship of resulted nitrates. Biological evaluation of these compounds revealed that most of the synthesized mononitrate derivatives demonstrated superior releasing capacity than isosorbide mononitrate (ISMN), and 2MNS-6 even demonstrated stronger NO releasing capacity than Isosorbide dinitrate (ISDN). Two dinitrates, DNS-1 and DNS-2, showed higher NO releasing capacity than ISDN. Evaluation of inhibitory activities to the contractions in mesenteric artery rings revealed that 2MNS-8 and DNS-2 showed stronger vasorelaxation activities than ISDN. High level of NO and soluble guanylyl cyclase (sGC) may be essential for the potent vasodilatory effect of DNS-2. The vasodilatory effects of DNS-2 may result from cellular signal transduction of NO-sGC-cGMP. DNS-2 was found to be the most potent sauropunol-derived nitrate vasodilatory agent for further pharmaceutical investigation against cardiovascular diseases.

Design, synthesis and performance evaluation of mPEG-PR: A novel non-absorbable marker.[Pubmed:30735825]

Eur J Pharm Sci. 2019 Apr 1;131:50-57.

The aim of the present study was to develop a new marker for correcting water flux in the in situ single-pass intestinal perfusion (SPIP) model. The new marker was designed and synthesized based on the application of both polyethylene glycol-4000 (PEG-4000) and phenol red as non-absorbable markers. The new marker mPEG-PR was obtained by combining phenol red with polyethylene glycol monomethyl ether-4000 (mPEG-4000) and verified by nuclear magnetic resonance (NMR), ultraviolet (UV) spectra, gel permeability chromatograph (GPC) and differential scanning calorimetry (DSC). mPEG-PR fully took the advantages of phenol red and PEG including the low permeability and the simple measuring method which were assessed by the in vitro and the in situ models. In the everted gut sac (EGS) studies, the permeability of mPEG-PR was significantly reduced by nearly 4 times compared with phenol red, and the absorptive percentage of mPEG-PR was <0.1% in 105min. In addition, the solution with verapamil or without Ca(2+) could help improve the absorption of phenol red but did not influence the absorption of mPEG-PR. The results of Isosorbide dinitrate as a model drug in the in situ SPIP study showed that both the mPEG-PR marker and the gravimetric method were useful for correcting water flux, which had smaller coefficients of variation than the phenol red marker and the non-corrected method. In conclusion, mPEG-PR could potentially be applied as an accurate and convenient marker for correcting water volume in the intestinal perfusion study.

The Endothelin Receptor Antagonist Macitentan Improves Isosorbide-5-Mononitrate (ISMN) and Isosorbide Dinitrate (ISDN) Induced Endothelial Dysfunction, Oxidative Stress, and Vascular Inflammation.[Pubmed:30687454]

Oxid Med Cell Longev. 2018 Dec 27;2018:7845629.

Objective: Organic nitrates such as isosorbide-5-mononitrate (ISMN) and Isosorbide dinitrate (ISDN) are used for the treatment of patients with chronic symptomatic stable coronary artery disease and chronic congestive heart failure. Limiting side effects of these nitrovasodilators include nitrate tolerance and/or endothelial dysfunction mediated by oxidative stress. Here, we tested the therapeutic effects of the dual endothelin (ET) receptor antagonist macitentan in ISMN- and ISDN-treated animals. Methods and Results: Organic nitrates (ISMN, ISDN, and nitroglycerin (GTN)) augmented the oxidative burst and interleukin-6 release in cultured macrophages, whereas macitentan decreased the oxidative burst in isolated human leukocytes. Male C57BL/6j mice were treated with ISMN (75 mg/kg/d) or ISDN (25 mg/kg/d) via s.c. infusion for 7 days and some mice in addition with 30 mg/kg/d of macitentan (gavage, once daily). ISMN and ISDN in vivo therapy caused endothelial dysfunction but no nitrate (or cross-)tolerance to the organic nitrates, respectively. ISMN/ISDN increased blood nitrosative stress, vascular/cardiac oxidative stress via NOX-2 (fluorescence and chemiluminescence methods), ET1 expression, ET receptor signaling, and markers of inflammation (protein and mRNA level). ET receptor signaling blockade by macitentan normalized endothelial function, vascular/cardiac oxidative stress, and inflammatory phenotype in both nitrate therapy groups. Conclusion: ISMN/ISDN treatment caused activation of the NOX-2/ET receptor signaling axis leading to increased vascular oxidative stress and inflammation as well as endothelial dysfunction. Our study demonstrates for the first time that blockade of ET receptor signaling by the dual endothelin receptor blocker macitentan improves adverse side effects of the organic nitrates ISMN and ISDN.

Contemporary Management of Heart Failure in the Elderly.[Pubmed:30535931]

Drugs Aging. 2019 Feb;36(2):137-146.

The foundation of the treatment of heart failure with reduced ejection fraction is a number of pharmacotherapies shown to reduce morbidity and mortality in large randomised multinational clinical trials. These include angiotensin converting enzyme inhibitors, angiotensin receptor blockers, beta-blockers, mineralocorticoid receptor antagonists, and more recently, a combined angiotensin receptor blocker neprilysin inhibitor, sacubitril/valsartan. In select cases, digoxin, ivabradine and hydralazine with Isosorbide dinitrate have a role to play in the treatment of heart failure with reduced ejection fraction. On this foundation, other more advanced treatments such as implantable cardioverter defibrillators and cardiac resynchronisation therapy are recommended in guidelines for the treatment of heart failure with reduced ejection fraction (i.e. an ejection fraction of

Validity of Performance and Outcome Measures for Heart Failure.[Pubmed:30354367]

Circ Heart Fail. 2018 Sep;11(9):e005035.

Background Numerous quality metrics for heart failure (HF) care now exist based on process and outcome. What remains unclear, however, is if the correct quality metrics are being emphasized. To determine the validity of certain measures, we compared correlations between measures and reliability over time. Measures assessed include guideline-recommended beta-blocker (BB), any BB, angiotensin-converting enzyme (ACE) inhibitor or angiotensin receptor blocker, mineralocorticoid receptor antagonist, and hydralazine/Isosorbide dinitrate (in blacks) use among candidates, 30-day mortality, 1-year mortality, and 30-day readmission. Methods and Results This was an observational cohort analysis using chart review and electronic resources for 55 735 patients from 102 Veterans Affairs medical centers hospitalized with HF from 2008 to 2013. Assessments of convergent validity and reliability were performed. Significant correlations were found between in-hospital rates of ACE inhibitor use and the following measures: BB use, 30-day mortality, and 1-year mortality. Guideline-recommended BB use was also significantly correlated with mineralocorticoid receptor antagonists, 30-day mortality, and 1-year mortality. There was no correlation between 30-day readmission rates and any therapy or mortality. Measure reliability over time was seen for guideline-recommended BBs ( r=0.57), mineralocorticoid receptor antagonists ( r=0.50), 30-day mortality ( r=0.29), and 1-year mortality ( r=0.31). ACE inhibitor and readmission rates were not reliable measures over time. Conclusions BB use, ACE inhibitor use, mortality, and mineralocorticoid receptor antagonist use are valid measures of HF quality. Thirty-day readmission rate did not seem to be a valid measure of HF quality of care. If the goal is to identify high-quality HF care, the emphasis on decreasing readmission rates might be better directed towards improving usage of the recommended therapies.

Intraoperative venesection and isosorbide dinitrate for postreperfusion syndrome during liver transplantation: A case report.[Pubmed:30142789]

Medicine (Baltimore). 2018 Aug;97(34):e11893.

RATIONALE: Postreperfusion syndrome is the most severe cardiovascular and metabolic alteration which typically occurs after the declamping of the portal vein of the grafted liver during liver transplantation, and it could affect the mortality and morbidity of the patient. PATIENT CONCERNS: We report the case of ischemic change in electrocardiogram with substantial increase of central venous pressure, from 6 to 16 mmHg, that developed immediately after reperfusion. DIAGNOSES: Based on his hemodynamic parameters, it was suspected that this event was caused by sudden volume overload in the right ventricle after reperfusion rather than hypovolemic status, thromboembolism, or any other possibilities. INTERVENTIONS: He was treated with active venesection of 300 mL and Isosorbide dinitrates infusion at the rate of 30 mug/min. OUTCOMES: The parameter values were restored to normal within 15 to 20 minutes after treatment, and the patient was discharged postoperatively without any significant cardiac sequelae. LESSONS: Although ischemic ST change during reperfusion reported without any previous cardiac complication is limited, the patient could recover rapidly with careful identification of the cause of PRS and immediate treatment.

Nitroglycerin application and coronary arteriogenesis.[Pubmed:30118486]

PLoS One. 2018 Aug 17;13(8):e0201597.

BACKGROUND: In the presence of a coronary occlusion, pre-existing small collateral vessels (arterioles) develop into much larger arteries (biological bypasses) that have the potential to allow a certain level of perfusion distal to the blockage. Termed arteriogenesis, this phenomenon proceeds via a complex combination of events, with nitric oxide (NO) playing an essential role. The aim of this study was to investigate the effects of supplemental administration of NO donors, i.e., short-acting nitroglycerin (NTG) or slow-release pelleted Isosorbide dinitrate (ISDN), on collateral development in a repetitive coronary artery occlusion model in rats. METHODS: Coronary collateral growth was induced via a repetitive occlusion protocol (ROP) of the left anterior descending coronary artery (LAD) in rats. The primary endpoints were the histological evaluation of rat heart infarct size and ST-segment elevation (ECG-analysis) upon final permanent occlusion of the LAD (experimentally induced myocardial infarction). The effects of NTG or ISDN were also evaluated by administration during 5 days of ROP. We additionally investigated whether concomitant application of NTG can compensate for the anti-arteriogenic effect of acetylsalicylic acid (ASA). RESULTS: After 5 days of ROP, the mean infarct size and degree of ST-elevation were only slightly lower than those of the SHAM group; however, after 10 days of the protocol, the ROP group displayed significantly less severe infarct damage, indicating enhanced arteriogenesis. Intermittent NTG application greatly decreased the ST-elevation and infarct size. The ISDN also had a positive effect on arteriogenesis, but not to the same extent as the NTG. Administration of ASA increased the infarct severity; however, concomitant dosing with NTG somewhat attenuated this effect. CONCLUSION: Intermittent treatment with the short-acting NTG decreased the size of an experimentally induced myocardial infarct by promoting coronary collateral development. These new insights are of great relevance for future clinical strategies for the treatment of occlusive vascular diseases.

Effects of systemic inhibitors of acid-sensing ion channels 1 (ASIC1) against acute and chronic mechanical allodynia in a rodent model of migraine.[Pubmed:30079481]

Br J Pharmacol. 2018 Nov;175(21):4154-4166.

BACKGROUND AND PURPOSE: Acid-sensing ion channels (ASICs) are neuronal proton sensors emerging as potential therapeutic targets in pain of the orofacial region. Amiloride, a non-specific ASIC blocker, has been shown to exert beneficial effects in animal models of migraine and in patients. We explored the involvement of the ASIC1-subtype in cutaneous allodynia, a hallmark of migraine affecting cephalic and extra-cephalic regions in about 70% of migrainers. EXPERIMENTAL APPROACH: We investigated the effects of systemic injections of amiloride and mambalgin-1, a specific inhibitor of ASIC1a- and ASIC1b-containing channels, on cephalic and extra-cephalic mechanical sensitivity in a rodent model of acute and chronic migraine induced by i.p. injections of Isosorbide dinitrate. KEY RESULTS: I.v. injections of these inhibitors reversed cephalic and extra-cephalic acute cutaneous mechanical allodynia in rats, a single injection inducing a delay in the subsequent establishment of chronic allodynia. Both mambalgin-1 and amiloride also reversed established chronic allodynia. The anti-allodynic effects of mambalgin-1 were not altered in ASIC1a-knockout mice, showing the ASIC1a subtype is not involved in these effects which were comparable to those of the anti-migraine drug sumatriptan and of the preventive drug topiramate on acute and chronic allodynia respectively. A single daily injection of mambalgin-1 also had a significant preventive effect on allodynia chronification. CONCLUSIONS AND IMPLICATIONS: These pharmacological data support the involvement of peripheral ASIC1-containing channels in migraine cutaneous allodynia as well as in its chronification. They highlight the therapeutic potential of ASIC1 inhibitors as both an acute and prophylactic treatment for migraine.

Prevention of contrast-induced nephropathy by adequate hydration combined with isosorbide dinitrate for patients with renal insufficiency and congestive heart failure.[Pubmed:30054906]

Clin Cardiol. 2019 Jan;42(1):21-25.

BACKGROUND: Adequate hydration remains the mainstay of contrast-induced nephropathy prevention, and nitrates could reduce cardiac preload. HYPOTHESIS: This study aimed to explore the adequate hydration with nitrates for patients with chronic kidney disease (CKD) and congestive heart failure (CHF) to reduce the risk of contrast-induced nephropathy (CIN) and at the same time avoid the acute heart failure. METHODS: Three hundred and ninty-four consecutive patients with CKD and CHF undergoing coronary procedures were randomized to either adequate hydration with nitrates (n = 196) or to routine hydration (control group; n = 198). The adequate hydration group received continuous intravenous infusion of Isosorbide dinitrate combined with intravenous infusion of isotonic saline at a rate of 1.5 mL/kg/h during perioperative period. The definition of CIN was a 25% or 0.5 mg/dL rise in serum creatinine over baseline. This trial is registered with www.clinicaltrials.gov, number NCT02718521. RESULTS: Baseline characteristics were well-matched between the two groups. CIN occurred less frequently in adequate hydration group than the control group (12.8% vs 21.2%; P = 0.018). The incidence of acute heart failure did not differ between the two groups (8 [4.08%] vs 6[3.03%]; P = 0.599). Cumulative major adverse events (death, myocardial infarction, stoke, hospitalization for acute heart failure) during the 90-day follow-up were lower in the adequate hydration with nitrates group (P = 0.002). CONCLUSIONS: Adequate hydration with nitrates can safely and effectively reduce the risk of CIN in patients with CKD and CHF.

Relief of vasospasm with fasudil after off-pump coronary artery bypass grafting: a case study.[Pubmed:30051150]

Surg Case Rep. 2018 Jul 27;4(1):82.

BACKGROUND: Coronary vasospasm after coronary artery bypass grafting (CABG) is a rare but potentially lethal complication. It is often refractory to several vasodilators. We report a case of refractory coronary vasospasm relieved by fasudil injection. CASE PRESENTATION: A 74-year-old woman who had three instances of in-stent stenosis at the left anterior descending artery (LAD) was referred for CABG treatment. Preoperative coronary angiography showed 90% in-stent stenosis of the proximal LAD and 75% stenosis of the diagonal branch. We performed a left internal thoracic artery (LITA)-LAD bypass and a right internal thoracic artery (RITA) diagonal branch bypass. After anastomosis, transit time flow measurement revealed poor blood flow of LITA-LAD bypass even after re-anastomosis. We performed coronary angiography and detected a vasospasm in the native coronary arteries, which was not relieved using conventional vasodilators (calcium channel blockers, Isosorbide dinitrate, and nicorandil) However, we were able to relieve the coronary vasospasm by administering fasudil (a Rho kinase inhibitor) injection without causing systemic hypotension. CONCLUSIONS: Fasudil may be an important vasodilator, especially in cases of coronary vasospasm after CABG.

Description

Isosorbide dinitrate (ISDN) is an NO donor that prevents LV remodeling and degradation of cardiac function following myocardial infarction (MI).

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