MK801 (0 050 1 mg kg-1, intraperitoneal [IP]) caused similar effe

MK801 (0.050.1 mg.kg-1, intraperitoneal [IP]) caused similar effects, but, with lesser changes in power. Figure 2. Dose-response effects of subcutaneous phencyclidine (PCP) 1 mg.kg-1 on electroencephalographic (EEG) spectral power in the prefrontal cortex and sensorimotor cortex in conscious rats. The abscissa represents the EEG spectral component between 1 and 30 … In contrast, the noncompetitive AMPA (amino-3hydroxy-5-methyl-4-isoxazole propionic acid) antagonists GYKI 52466 and GYKI 53655 #selleckchem keyword# increased RRG power over the whole power spectrum (1-10 mg.kg-1, IP). Clozapine, an atypical antipsychotic

agent (0.2 mg.kg-1, subcutaneous) synchronized the RRG (peak 8 Hz) (Figure 3.) The 5-HT2A antagonist M100907 specifically increased RRG Inhibitors,research,lifescience,medical power at 2 to 3 Hz at low doses (10 and 50 ug.kg-1 subcutaneous), whereas at higher doses (0.1 mg.kg-1, subcutaneous) the profile resembled that of clozapine. Figure 3. Dose-response effects of subcutaneous clozapine (0.2 mg.kg-1) expressed as percentage change of electroencephalographic (EEG) spectral power in the prefrontal cortex and sensorimotor cortex of conscious

rats at each frequency between 1 and 30 Hz. Vertical … Clozapine (0.2 mg.kg-1, subcutaneous), GYKI 53655 (5 mg.kg-1, IP), prazosin (0.05 and 0.1 mg.kg-1, IP), and M100907 (0.01 Inhibitors,research,lifescience,medical and 0.05 mg.kg-1, subcutaneous) antagonized the decrease in power between 5 and 30 Hz caused by PCP (1 mg.kg-1, subcutaneous), but not the increase in power at 1 to 3 Hz in prefrontal Inhibitors,research,lifescience,medical cortex (Figure 4.) Figure 4. Coadministration of subcutaneous phencyclidine (PCP) (1 mg.kg-1) and

clozapine (0.2 mg.kg-1), expressed as percentage change of electroencephalographic (EEG) spectral power in the prefrontal cortex and sensorimotor cortex of conscious rats at each frequency … Conclusion Thus, clozapine, supposedly the best antipsychotic agent, available, apart from its limiting side effects, clearly increased theta rhythm in prefrontal cortex, indicating beneficial effects on cognition. Clozapine also partially antagonized Inhibitors,research,lifescience,medical the effects of PCP on RRG, but only the desynchronization. These results clearly show that the effects Adenosine of PCP on RRG can be used a model for schizophrenia, which may be transposable to man. The profiles of compounds screened for activity in this model are allowing new therapies for schizophrenia to be developed, particularly if all the effects of PCP may be antagonized.
Animal models are defined as experimental preparations developed in one species in order to study phenomena existing in another species. When addressing animal models of human psych opathology, attempts are made to reproduce in animals some syndromes or symptoms resembling as far as possible some human syndromes or symptoms in order to study particular aspects of human psychopathology.

52 Bilateral 8 band stimulation of DL-PFC and phase-synchronizing

52 Bilateral 8 band stimulation of DL-PFC and phase-synchronizing dual-channel frontoparietal stimulation both enhanced working memory performance.53,54 Phase-desynchronizing γ stimulation (180-degree phase offset) of occipital-parietal areas affected bistable motion perception.55 tACS also appears to modulate motor output; feedback tACS, based on measured tremors, in patients reduced tremor symptoms and therefore suggests that the phase of tACS plays an important role.56 α and β stimulation of the primary motor cortex had differential effects on motor Inhibitors,research,lifescience,medical performance.51 In particular, β-stimulation slowed movement,57 but increased corticospinal excitability

measured by TMS.58,59 Similarly, the excitability of the occipital cortex was selectively increased by β-band tACS.60,61 γ-frequency tACS over the middle frontal gyrus enhanced fluid intelligence, while other frequencies failed to show an effect.62 High β-frequency Inhibitors,research,lifescience,medical tACS improved contrast perception, but did not modulate spatial attention.63 Even higher-frequency stimulation (in the so-called ripple range, 140 Hz)64 enhanced excitability in the motor cortex.65 Likely, these effects of tACS crucially depend on the total Inhibitors,research,lifescience,medical dose which involves session duration, amplitude, electrode size and position, and number of sessions. For example, an initial tACS study with short stimulation durations failed to

show modulation of excitability in any stimulation frequency band.66 Due to the lack of standardization of stimulation parameters, the direct comparison between studies is not feasible, and the field of tACS is in Inhibitors,research,lifescience,medical its infancy due to the lack of commonly accepted stimulation effects.

Nevertheless, it has become clear that tACS can elicit electrophysiological and behavioral effects that depend on the stimulation frequency. Understanding the underlying mechanism will enable the targeted choice of stimulation frequency to treat specific network deficits that Inhibitors,research,lifescience,medical may vary from patient to patient. The putative mechanism of frequency-specific effects as a starting point for such rational design is discussed below. Network mechanisms of tACS From the perspective of dynamic through systems theory, tACS corresponds to a periodically forced intrinsic oscillator. The periodic force corresponds to the applied sine-wave stimulation current, and the endogenous network selleck products oscillations represent the intrinsic oscillator. It is well known that stimulation of intrinsic oscillators at different frequencies has different effects. Most prominently and implicitly assumed in the abovementioned studies, stimulation at the endogenous or intrinsic frequency is, in general, an effective way to enhance that oscillation. However, the question arises as to what extent the intrinsic oscillator rejects stimulation at other frequencies. This is fundamentally important for the design of brain stimulation to manipulate cortical oscillations.

Consistent with the results of some of the previous studies, we f

Consistent with the results of some of the previous studies, we found an association between fibrinogen and the levels of air pollutants.16 In addition, we examined, for the first time, the concentration and activity of natural anticoagulant proteins but found no consistent association with air pollution levels. In contrast to the results of the Mutlu et al. study,15 PTT had no correlation Inhibitors,research,lifescience,medical with exposure to air pollutants in our study. Previous studies have suggested that air pollutants alter blood coagulation through the induction of the tissue factor. Because air pollutants are known

to elicit pulmonary and systemic inflammatory Selleck FTY720 responses, perhaps pollution exposure increases the levels of mediators capable of Inhibitors,research,lifescience,medical inducing tissue factor expression, thereby generating a tendency to hypercoagulability.1,14-20

The absence of a correlation between PTT and exposure to air pollutants in our study is consistent with the above-mentioned hypothesis. Moreover, in this study, we observed a rise in the level of platelet count after exposure Inhibitors,research,lifescience,medical to pollutants. Similar observations were reported by Poursafa et al.21 in children and young adults residing in Isfahan, the second most polluted industrial city in Iran. A previous analysis of the mixture of dust positioned in the southwest of Iran reveled that it contains heavy metals such as uranium, thorium, arsenic, lead, zinc, cobalt, iron, copper, and nickel.22 Sangani et al.23

reported that sulfated metals (except for nickel) can decrease coagulation time by affecting Inhibitors,research,lifescience,medical coagulant factors. The present study is not without limitations. A limitation of this study is that ambient air pollution was used as a surrogate for personal exposure, which may have contributed to Inhibitors,research,lifescience,medical measurement inaccuracy. Such a measurement error would generally tend to bias estimates toward the null,24 and may affect the results. Nonetheless, the result of drawing upon ambient measurements to estimate exposure is likely to be only a modest underestimation Parvulin of pollution effects. In addition, due to some laboratory difficulties, the effect of pollutants on IL-6 was not investigated in this study. Many authors have reported the effect of pollutants on IL-6 and, as a result, coagulant state in their surveys. However, in regard to the other published data, it can be argued that we would have found a significant rise in IL-6 levels after climate change if we had measured it. We also did not assess the effect of these pollutants on cardiovascular diseases directly. A reduction in coagulation time can increase the risk of cardiovascular diseases. Rückerl et al.25 suggested that air pollutants can increase the occurrence of cardiovascular diseases by affecting coagulation state. These findings were subsequently borne out by Conlon et al.

Figure 1 Arrow points toward the deformity of superior mesenteric

Figure 1 Arrow points toward the deformity of superior mesenteric vein by tumor. Figure 2 Arrow points toward the deformity of portal vein and abutment of tumor on the common hepatic artery. Operative techniques for head of pancreas cancer include the standard pancreaticoduodenectomy (Whipple procedure) and pylorus-preserving pancreaticoduodenectomy. Extended retroperitoneal lymphadenectomy and superior mesenteric vein and/or portal vein resection have recently been evaluated for maximal surgical clearance of disease. The type of pancreatic anastomosis has also

Inhibitors,research,lifescience,medical been examined, including pancreaticojejunostomy versus KPT-330 solubility dmso pancreaticogastrostomy. Several institutions have reported their results for laparoscopic pancreatic resection with comparable results to open resection. Various post operative strategies have been evaluated for reduction of post-operative complication rates, including the use of octreotide (somatostatin

analogue) , pancreatic enzyme replacement therapy, erythromycin Inhibitors,research,lifescience,medical and nutritional support. The purpose of this article is to review the preoperative, operative, and post operative management strategies in the treatment of pancreatic cancer. Determination Inhibitors,research,lifescience,medical of resectability Paramount to the decision for performing pancreatic-oduodenectomy is the accurate identification of patients who have resectable disease. Various imaging modalities are available to accurately stage a patient with pancreatic cancer, including CT, PET/CT, ERCP, endoscopic ultrasound, mesenteric angiography, and MRCP. CT scan has been the main imaging modality for determination of resectability. With advances in medical imaging and improvement in the resolution capability, the role of diagnostic laparoscopy Inhibitors,research,lifescience,medical is now limited in the initial evaluation of resectability. In a recent study of 298 patients, Mayo et al reported 87% resection rate in this

cohort where CT was performed in 98% Inhibitors,research,lifescience,medical of the study patients, EUS in 32%, and laparoscopy in 29% (23). In the laparoscopy group, 27% had findings that precluded resection. In a recent review of their experience at Memorial Sloan-Kettering Cancer Center, White et al reported an yield of diagnostic laparoscopy of 14% overall, but only with 8% yield in patients with in-house pre-operative imaging versus 17% with external imaging (24). The same group proposed a judicious use of diagnostic laparoscopy with the combination of pre-operative CA19-9 as a stratification factor to consider laparoscopy in those with resectable 17-DMAG (Alvespimycin) HCl disease on imaging and elevated CA19-9 level (25). Preoperative Biliary Drainage Because of the predominant location of pancreatic cancer in the head of pancreas, obtructive jaundice is a common presenting symptom. Several cohort studies have been published regarding the detrimental effect of pre-operative biliary instrumentation/stenting on the post-operative course with higher infectious complications in the stented group (26)-(31). No difference in survival was observed.

RI scans, suggesting that some of the age-related cognitive decli

RI scans, suggesting that some of the age-related cognitive decline may be explained by greater white matter hyperintensities. De Groot et ai82 examined the association between periventricular and subcortical white matter hyperintensities and cognitive deficits in more than 1000 community-dwelling Fostamatinib mw healthy individuals. After adjusting for atrophy, Inhibitors,research,lifescience,medical stroke history, educational level, and presence of depression, they found a significant association between neuropsychological

deficits (primarily psychomotor speed) and periventricular, but not subcortical, white matter hyperintensities. Inzitari ct al83 suggested that, a direct, effect of white matter hyperintensities on cognition may be explained by disconnection between cortical and subcortical brain regions due to fiber tract, demyelination and gliosis. Schretlen et al24 assessed a group of 112 healthy young and old adults with high-resolution Inhibitors,research,lifescience,medical MRI and tasks of perceptual comparison speed, working memory, and executive functions. One of their main findings was that. both age and executive abilities had a significant correlation with frontal lobe volume (ie,

older age and more deficits on executive functions were significantly Inhibitors,research,lifescience,medical related to smaller frontal lobes). A similar correlation between more perseverations on a set-shifting task and smaller frontal lobe volumes was reported by Raz et al.71 Several studies tried to disentangle the neuropathologic changes specific to AD from those related to the aging process. Brains of elderly cognitivcly normal individuals may show the initial changes of AD, such as senile plaques, neurofibrillary tangles, Inhibitors,research,lifescience,medical Inhibitors,research,lifescience,medical and Lewy bodies, albeit, below the amount required

to make a pathologic diagnosis of a specific neuropathologic condition.84 These changes were considered as either part, of the normal aging process, or as incipient, AD.85 In a sample of 10 brains from, cognitively normal individuals aged 85 to 105 years at time of death, Hulcttc et al86 found a relatively poorer cognitive performance in tasks of memory and executive functions in those individuals with the neuropath ological changes of early AD compared with individuals with normal brains. This lack of brain pathological changes Electron transport chain in a subgroup of elderly individuals demonstrates that AD is not a final common pathway for the oldest-old. In conclusion, age-related volume reductions were reported mainly for the frontal lobes and limbic regions. This process is not linear, but may occur at specific stages of life. White matter hyperintensities are related to older age and may explain some of the age-related cognitive decline. The early ncuropathological changes of AD may account for mild cognitive deficits in nondemented elderly individuals.

A UPUC cluster may then be defined as a reaction subset that con

A UPUC cluster may then be defined as a reaction subset that connects a set of UPUC metabolites. Besides the high essentiality of these UPUC reactions, which is one of the key issues in [19], they comprise also some other quite interesting features, e.g., proportionally fixed steady-state fluxes and significant correspondence with gene-regulatory modules [19]. We would like to point out that the UPUC category, as defined above, has not been used Inhibitors,research,lifescience,medical in the original study of Samal et al. [19], but rather a set consisting of reactions that are either associated

with UP or UC metabolites. Synthetic accessibility (SA), defined by Wunderlich and Mirny [20], is influenced by a measure used in chemical drug design describing the number of steps needed to synthesize a specific compound from a given set Inhibitors,research,lifescience,medical of compounds. Accordingly, the SA for a metabolic system is defined as the minimal number of reactions needed to reach a set of BMS-907351 price outputs (e.g., biomass) from a given set of inputs (e.g., medium composition) as obtained by a breadth-first-search traversal that can only proceed if all needed substrates are available. SA is Inhibitors,research,lifescience,medical successful in predicting essential genes, as many lethal mutations lead to an increase of the SA [20]. For this work we choose to treat SA as a reaction category

by assigning an SA label to every reaction whose knock-out causes a change in biomass SA. Figure 1a shows a schematic representation of metabolism with three exchange reactions (X1, X2 and X3) with the

environment and a two-component biomass reaction (BM). Circles represent metabolites, while boxes stand Inhibitors,research,lifescience,medical for Inhibitors,research,lifescience,medical reactions in this bipartite graph view of a metabolic system. In this Figure, R1 (highlighted in blue) is an example of an SA reaction, as it represents one of the shortest paths to BM, while R5 (highlighted in green) is consuming and producing only metabolites, which are uniquely produced (UP) and uniquely consumed (UC), and thus is an example of a UPUC reaction. Figure 1b–e provides a qualitative impression of the wild-type flux distribution (Figure 1b) and the re-routing of fluxes upon R1 and R5 knockout (Figure 1c,e), respectively. Figure 1 Network context of topological reaction categories. (a) of Simple scheme of a small fictitious metabolic reaction system with examples of UPUC and SA reactions. (b) Wild-type network. (c) Knockout of SA reaction R1. Fluxes are rerouted over R4 leading to … In the example in Figure 1, both reactions (R1 and R5) have an alternative path that goes along reaction R4. Thus, both reaction labels would in this case not serve as a reliable predictor of the reaction’s essentiality.

31 The salient findings in our current study are: Comparison of t

31 The salient findings in our current study are: Comparison of the mean headache severity decrement between sodium valproate

and Sumatriptan at half an hour, one hour, and 2 hours after administration showed that sodium valproate was as effective as Sumatriptan for headache relief. Sodium valproate was more effective than Sumatriptan in decreasing the associated symptoms. The side effects of sodium valproate were significantly fewer than those of Sumatriptan.  In previous studies that similarly used intravenous sodium valproate, no significant side effects were reported.19-22 The only report for side effects was made by the Shahien R et al.23 study (2011): photophobia (67%); unilateral #SB939 molecular weight keyword# pain (50%); vomiting (41%); phonophobia (39%); and pulsatile pain (36%). In that study, the loading dose of sodium valproate was 900-1200 mg. Consequently, the difference between the dosage in that study and ours (400 mg) may explain the conflicting results. The prescribed dose of sodium valproate, i.e., Inhibitors,research,lifescience,medical 400 mg, seems appropriate for relieving acute migraine attacks. In the Sumatriptan group, the improvement rates of nausea, photophobia, and phonophobia were very low Inhibitors,research,lifescience,medical compared to those reported previously.27 It seams that the main reasons for this discrepancy are genetic

and ethnic differences. All the patients without nausea and vomiting who received Sumatriptan developed nausea and vomiting. Thus, it seems that sodium Inhibitors,research,lifescience,medical valproate may be more effective than Sumatriptan in patients presenting without nausea and vomiting.  Given that Sumatriptan has more side effects and administration limitations, the following findings

of our study highlight the advantage of sodium valproate over Sumatriptan in the treatment of acute migraine attacks: Sodium valproate has similar effectiveness compared to Sumatriptan. Sodium valproate is more efficacious in alleviating headache-associated symptoms. Sodium valproate can replace Sumatriptan in patients with contraindications for Sumatriptan use. Sodium Inhibitors,research,lifescience,medical valproate has fewer side effects. Conclusion Our study suggests that 400 mg of intravenous sodium valproate is effective in the treatment of acute migraine headache, particularly in patients not on sodium valproate prophylaxis or in patients with contraindications for Sumatriptan use. Conflict of Interest: None declared.
Background: The United Nations has predicted GPX6 that the population of slum dwellers will have grown from one billion people worldwide to 2 billion by 2030. This trend is also predictable in Iran. In the Iranian metropolis of Shiraz, more than 10% of the residents live in slum areas. There are several problems regarding the delivery of social services in these areas. The aim of this study was to evaluate slums dwellers’ access to and coverage of health care. Methods: This cross-sectional face-to-face study included 380 household of slum dwellers via stratified random sampling.

However, de Morsier’s classification Is perhaps most remembered f

However, de Morsier’s classification Is perhaps most remembered for one syndrome, mentioned In passing, that sparked a 70-year controversy. Table I. de Morsier’s classification of visual hallucinatory syndromes. Table II. Visual hallucinatory syndromes not CP-690550 mw included by de Morsier. LSD, lysergic acid diethylamide; MDMA, 3,4-methylenedioxymethamphetamine; PTSD, post-traumatic stress disorder The Charles Bonnet Inhibitors,research,lifescience,medical syndrome De Morsier included a brief mention of a syndrome Inferred from reports In the literature. Charles

Bonnet’s description of the visual hallucinations experienced by his 89-year-old grandfather Charles Lullin (see ref 14 for detailed account) had been largely overlooked in the early 20th century visual hallucination literature. However, the account was well known to de Morsier through accidents of birth and Inhibitors,research,lifescience,medical geography. His mother

was related to Theodore Flournoy and Edouard Calparède, cousins themselves and founding editors of the Archives of Psychology, Flournoy had inaugurated the first issue with a commentary and transcript of Lullin’s original Inhibitors,research,lifescience,medical observations that survived in the collections of a surgeon,16 and in 1909 an autobiographical report of the 92-year-old philosopher Ernest Naville’s visual hallucinations were published in the same journal.17 Bonnet, Lullin, Naville, Flournoy, and the Archives of Psychology were all linked to Geneva – then, and for the remainder Inhibitors,research,lifescience,medical of his life, de Morsier’s home. Basing his syndrome on these published accounts, he argued that visual hallucinations could occur in the absence of cognitive Impairment In the elderly, a syndrome he referred

to as the Charles Bonnet syndrome (CBS). For de Morsier, CBS Implied a localized neurodegeneration and contrasted Inhibitors,research,lifescience,medical the association of visual hallucinations and dementia in Alzheimer’s disease (AD) and Pick’s disease. Although he did not specify the site of the theoretical neurodegenerative lesion, he later revealed his suspicion that it involved the paravisual sphere,18 the pulvino-cortical connections he had linked to visual hallucinations in 1935. The ocular theory Although de Morsier was unable to confirm his neurodegenerative hypothesis, he was next certain of one thing: CBS had nothing to do with eye disease. For him the fact that Charles Lullin had impaired vision was no more than a coincidence of the fact that eye problems were common in the elderly. His position was to influence developments in the field for the next 70 years, and had its roots in a debate that had taken place the previous decade in the ophthalmological literature.

Current research suggests that factors external to the ED, such a

Current research suggests that factors external to the ED, such as hospital bed availability, laboratory turnaround, specialist consultation availability and elective surgery schedules may be more important in determining ED throughput than internal bottlenecks such as ED staff availability and bed shortages [2-4]. The 2001 position statement on ED Overcrowding by the Canadian Association of Emergency Physicians stated that Inhibitors,research,lifescience,medical hospital overcrowding was the primary cause of ED overcrowding [7]. That is, patients

who should be admitted are held (boarded) in the ED because there are no hospital beds available, and this in turn uses ED resources and prevents other patients from being treated in a timely manner in the ED. This position has been echoed by professional bodies in Australia, the USA and the UK [8-10]. In addition to the potential health impact of admission delays, there may be an economic impact [11-13]. Admission through the ED accounts Inhibitors,research,lifescience,medical for a sizable portion of all admissions to surgery and inpatient wards [6]. However, there is limited evidence on the health or economic Inhibitors,research,lifescience,medical impact of emergency department admission delays

in Canada. We sought to determine the impact of emergency department admission delays on two outcomes: inpatient (IP) LOS and total IP cost. Methods Study design and patient population This was a secondary analysis using data from London Health Sciences Centre, a large multisite acute-care teaching hospital in Ontario, Canada with two adult EDs. The data was contained Inhibitors,research,lifescience,medical in three administrative databases: The National Ambulatory Care Reporting System (NACRS), which captures information on ED visits; the Discharge Abstract Database (DAD), which stores information on inpatient

stays; and the hospital’s case costing database, which records all resources consumed Inhibitors,research,lifescience,medical by patients during their hospital visits. Eligible patients were all persons ≥ 18 years of age who selleck chemicals presented to either of the EDs between April 1 2006 and March 30 2007 and who were subsequently admitted to the operating room (OR), ICU, or an inpatient ward. found This patient population was selected by identifying patient IDs that were present in both the NACRS and the DAD for the same hospital encounter. Records were excluded when there were linking algorithm errors, unmatched ED or hospital stays, or a negative LOS for either the ED or the inpatient stay. Clinical information was obtained from the available data fields in the NACRS and the DAD. Cost information was obtained by linking this cohort with the case costing database. All costs are in 2006 Canadian dollars.

2003]] are among these risk factors [Arbel et al 2007; Hanon et

2003]] are among these risk factors [Arbel et al. 2007; Hanon et al. 2010]. Bednar et al. [2001] in their Table 2 identified 16 factors prolonging the QTc interval. Those risk factors included (1) congenital, (2) increasing age, (3) female sex, (4) meals, (5) sleep, (6) drugs, (7) obesity/weight gain, (8) liquid protein diet, (9) alcoholism, (10) electrolyte disturbances (hypokalemia, hypomagnesemia, hypocalcemia), (11) hypoglycemia/diabetes mellitus, (12) myocardial ischemia and infarction, cardiomyopathy, (13) hypertension, (14) hypothyroidism/pituitary insufficiency, (15) central nervous system insult: stroke, subarachnoid

Inhibitors,research,lifescience,medical hemorrhage, trauma, infection, tumor and (16) cirrhosis. Viskin et al. [2003] in their review (Figure 3 derived Inhibitors,research,lifescience,medical from 229 published cases) of the long QT syndrome caused by noncardiac drugs identified seven major risk factors in order of greatest to least as follows: (1) female sex, (2) heart disease, (3) hypokalemia, (4) toxic drug CI1040 levels, (5) drug interactions involving the QT interval, (6) metabolic drug interactions Inhibitors,research,lifescience,medical and (7) familial history of long QT syndrome. The authors found that 96% of their study subjects had one or more risk factors, 72% had two or more risk factors and 39.5% had three or more

risk factors. In our Table 1, we slightly modified this list to include (1) female sex, (2) heart disease, (3) hypokalemia/hypomagnesemia, (4) drug interactions involving the QT interval and metabolic drug interactions, (5) hepatic impairment and (6) others including sinus Inhibitors,research,lifescience,medical bradycardia and cocaine. High-dose methadone (120 mg/day and above) The United Kingdom methadone treatment guidelines [Department of Health (England) and the Devolved Administrations, 2007] recommend obtaining an EKG in persons taking greater than 100 mg of methadone per day. Anchersen et al Inhibitors,research,lifescience,medical found an association with dosages ≥120 mg and QTc interval > 500 msec [Anchersen et al. 2009]. Twenty-three of our 31

adults (74.2%) were exposed to daily methadone doses of 120 mg or greater (Table 1). In the Hanon et al. [2010] series, seven of 12 subjects (daily dose range 35 to 250 mg) received daily doses of methadone 140 mg or greater. In contrast to daily methadone doses of up to 700 mg daily very (our Table 1), these patients were exposed to no more than 250 mg of methadone/day. In our sample, seven cases (25.8%) experienced QTc interval prolongation at doses less than 120 mg per day, with the lowest dosage reported being only 40 mg of methadone. Even though a methadone dose effect on QTc interval lengthening may appear [Krantz et al. 2003; Chang et al. 2011], its clinical utility is highly questionable [Cruciani, 2008].