By W. Farmon. Southern Illinois University at Carbondale. 2018.
The noradrenergic system has also been explored as a novel individual pharmacotherapy in OCD generic viagra sublingual 100mg fast delivery. A case report of clon- idine buy 100 mg viagra sublingual visa, an 2-agonist, documented improvement in OCD Anticonvulsants (186). Intravenous clonidine was reported to markedly re- There are three case reports of significant response to non- duce obsessions in six OCD patients (187). However, in benzodiazepine-related anticonvulsants (two of whom had a double-blind controlled crossover trial of clomipramine, clinical epilepsy) all with carbamazepine, and 23 treatment clonazepam, and clonidine in 28 OCD patients, clonidine was found ineffective in reducing OCD symptoms (188). Two patients with OCD and clinical epilepsy responded to clonazepam treatment (196); however, clinical experience with anticonvulsants may be more positive. Two Stimulants and Dopamine Releasers of 12 patients (17%) at two sites had successful trials of Although most attention has focused on the blockade of carbamazepine, and six of 26 patients (23%) at three sites dopaminergic receptors in OCD, there are also reports that had positive outcomes with sodium valproate (172). Controlled trials are required, al- There have been six reported cases of improvement associ- though it has low abuse potential, low physical dependency, ated with antiandrogen treatment, four of which were men- and mild tolerance. Only one antiandro- gen failure has been reported, and one failure of estrogen treatment alone. An open trial with flutamide, an androgen AUTOIMMUNE TREATMENTS receptor antagonist, in eight OCD patients, demonstrated a lack of response (197). None of the OCD centers has Autoimmune mechanisms may also play a role in at least reported using this modality in treating OCD. As such, a subtype of patients with OCD, particularly those who this treatment has not been well studied. In practice, the manifest a sudden onset of OCD symptoms following infec- feminizing effects of these treatments in males limit their tion by group A B-hemolytic streptococci. In females, it is unclear whether penicillin were not found to be effective in such patients treatment efficacy, if present at all, is limited to specific (206). Plasmapheresis and intravenous immunoglobulin phases of the menstrual cycle. This treatment is unlikely to (IVIG) have been reported effective in case studies (207). Recently, both IVIG and plasma-exchange groups were as- sociated with significant improvement at 1 month in 30 children with infection-triggered exacerbations of OCD or Second Messenger SystemAgents tic disorders who received IVIG, plasma exchange, or pla- cebo (208). Agents that affect second messenger systems may also be effective in OCD. In a 6-week double-blind controlled crossover trial of inositol versus placebo in 13 OCD pa- tients, YBOCS scores with inositol treatment were signifi- INVASIVE PROCEDURES cantly lower than scores when on placebo (198). Finally, novel nonpharmacologic treatments may also play a role in treating some OCD patients. Right prefrontal re- Peptides petitive transcranial magnetic stimulation has been shown The role of peptide hormones has been studied in OCD. Further studies severity, suggesting a possible role for oxytocin in the neuro- are warranted. Recent work with vagal nerve stimulation, biology of OCD (199). Oxytocin is a hormone released by deep brain stimulation, and various forms of neurosurgery the posterior pituitary that regulates uterine and lactiferous suggest promise, but require controlled trials. It has been implicated in certain ritualized Patients who have failed all pharmacologic and behav- behaviors and the extinction of active avoidance behavior ioral treatments (and probably ECT) may be candidates for in animals (200). In all, there have been three reported cases neurosurgical treatments of OCD (210). Various proce- of improvement with chronic intranasal oxytocin and 12 dures in intractable cases have been successful, with 25% failures (172–201). There have been no reports of improve- to 30% of patients experiencing significant benefit without ment with vasopressin; however, this medication has not undue side effects. The most common current neurosurgical been administered chronically. None of eight patients at two procedure is cingulotomy, either performed via craniotomy OCD sites improved with oxytocin treatment. In a United States trial, 18 experience is limited with this modality, it does not appear patients underwent cingulotomy. At follow-up 2 years later, to be a promising treatment. Neurosurgery should be considered for a small percentage of truly refrac- Opiates tory patients.
This is often the result of long standing LVH or slowed LBBB conduction (1st degree block) purchase viagra sublingual 100mg otc. QRS duration is normal generic viagra sublingual 100mg with amex, and there is a slight slur to the R wave downstroke in lead aVL. The following ECG criteria have been proposed (Perez Riera et al Ann of Noninvasive Electrocardiol 2011; 16:196). The prominent anterior forces (PAF) were not present in prior ECGs from this patient. Before 3rd degree block occurs there may be episodes of type II 2nd degree AV block (Mobitz) indicating intermittent block in the remaining fascicle. These episodes often cause symptoms of syncope or presyncope and indicate need for a pacemaker. RBBB + LAFB (bifascicular Block The ECG shown next is classic RBBB and LPFB (bifascicular block) in a patient with chronic heart failure. Note the unusual frontal plane QRS axis of +150º (isoelectric lead II), the rS complex in lead I, and the small q-waves in II, III, aVF. Incomplete RBBB looks like complete RBBB but with QRS duration 100-120 ms. Similarly incomplete LBBB looks like complete LBBB with QRS durations 100-130 ms with monophasic R waves in at least two of three leads (I, aVL, V6). Wolff-Parkinson-White (WPW) Preexcitation Although not a true IVCD, this entity is associated with wider QRS complexes and, therefore, deserves to be considered here. WPW Preexcitation (note short PR and delta waves best seen in I, V5-6) 7. ATRIAL ABNORMALITIES Right Atrial Enlargement (RAE, P-pulmonale, “Viagra P-waves”) P wave amplitude >2. P-mitrale) P wave duration 120 ms in frontal plane (usually lead II) Notched P wave in limb leads with interpeak duration 40 ms. These patients have increased risk for atrial fibrillation. Note the prolonged, biphasic (+/-) P wave in the inferior leads indicating late superior direction of atrial direction into the left atrium. VENTRICULAR HYPERTROPHY 61 Introduction: The ECG criteria for diagnosing right or left ventricular hypertrophy are very insensitive (i. Left Ventricular Hypertrophy (LVH) General ECG features include: QRS amplitude: voltage criteria; i. This pattern is more common with LVH due to pressure overload (e. Note also: SD + SV4 = 33 mm Example 2: (ROMHILT-ESTES Criteria: 3 points for precordial lead voltage, 3 points for ST-T changes; also LAE (possibly bi-atrial enlargement). This pattern is classic for LVH due to severe LV pressure overload as seen in aortic stenosis and hypertensive heart disease. Right Ventricular Hypertrophy General ECG features include: Right axis deviation (>90º) in frontal plane Tall R-waves in RV leads (V1-2); deep S-waves in LV leads (V5-6) Slight increase in QRS duration ST-T changes directed opposite to QRS direction (i. Note qR pattern in V1, marked RAD (+140º), large P-terminal force in V1 (LAE), slight increased QRS duration (incomplete RBBB), deep S wave in V5-6. Note: marked RAD (+140º), R in V1 >7mm, prominent anterior forces in V1-3, increased P amplitude of RAE, and the typical RV strain pattern in precordial leads (ST depression, T wave inversion) Example #3: RVH in patient with an atrial septal defect. Biventricular Hypertrophy (difficult ECG diagnosis to make) In the presence of LAE any one of the following suggests this diagnosis: R/S ratio in V5 or V6 < 1 S in V5 or V6 > 6 mm 65 RAD (>90º) Other suggestive ECG findings: Criteria for LVH and RVH both met or LVH criteria met and RAD or RAE present 9. MYOCARDIAL INFARCTION Introduction to ECG Recognition of Acute Coronary Syndrome (ACS) The ECG changes of ACS are the result of a sudden reduction of coronary blood flow to regions of ventricular myocardium supplied by a coronary artery with a ruptured or eroded atherosclerotic plaque and intracoronary thrombus formation. Depending on how quickly the patient gets to the hospital for definitive treatment (usually percutaneous revascularization or thrombolytic Rx) myocardial necrosis (infarction) may or may not occur. The diagram below shows four possible ECG outcomes of myocardial ischemia in the setting of new onset coronary ischemia. On the left side no myocardial necrosis (or infarction) occurs (negative troponins) but there is either subendocardial ischemia manifested by transient ST segment depression or transmural ischemia manifested by transient ST segment elevation. On the right are the two types of myocardial infarction (with elevated troponins indicative of cellular death), one manifested by ST segment elevation (STEMI) and one without ST segment elevation (NonSTEMI). Because Q waves may not appear initially, early treatment decisions are based on the presence or absence of ST segment elevation, and if revascularization is accomplished quickly Q-waves may never appear as the residual damage or scar is small (therefore, “time is muscle” says the interventional cardiologist). In the setting of a proximal right coronary artery occlusion, however, there may also be a component of right ventricular infarction as well.
In addi- depression cheap viagra sublingual 100 mg with visa, exclusive of medication acquisition costs viagra sublingual 100 mg with visa, have tion, some of the newer antidepressants are available as been estimated at $2. Most of these costs doses have the opportunity to reduce costs substantially with were related to hospitalization. The better tolerability of the only the modest inconvenience entailed by breaking the newer versus the older antidepressants might well lead to pills. However, higher doses of some medications lead to reductions in these expensive treatment services. A formal determination of whether the higher acquisi- tion price of the newer antidepressants relative to the older Scott W. Bruce Baker: Department of Psychiatry, Yale antidepressants is offset by savings in other areas or increased University School of Medicine, New Haven, Connecticut. AVERAGE WHOLESALE PRICE FOR A 30-DAY SUPPLY OF NEWER ANTIDEPRESSANTS Average Wholesale Price ($)a Strength Antidepressant (mg) Dosing Brand Generic Fluoxetine 10b QD 76. For QD dosing, the lowest cost for 30 pills was used, and 60 pills for BID dosing and 90 pills for TID dosing. When few or no suppliers offered lots of 30, 60, or 90 pills, the lowest-price 100-pill lot was multiplied by 0. Cost-effectiveness is represented as a ratio between sumed in providing the intervention, in this case the treat- direct costs, the numerator, and changes in health status, ment of depression, which includes dealing with side effects the denominator. The relative cost-effectiveness of newer and other consequences. Direct costs are further subdivided versus older antidepressants is represented as the incremen- into four major categories. The first category encompasses tal or marginal difference between the cost-effectiveness ra- changes in the use of health care resources (e. The sec- effectiveness of switching to secondary treatments, postu- ond category of direct costs encompasses changes in the use lated lengths of treatment, and costs and health effects in- of other resources (e. Direct costs are the resources con- Health effects are divided into two major categories. In Chapter 78: Cost-effectiveness of the Newer Antidepressants 1121 the first category, the intrinsic value of changes in health Some of the perspectives commonly discussed or used status, a value is placed on achieving or avoiding a specific include the following: patient or patient/family, employer/ health state. The health state may be characterized by using a payer, individual health care institution (e. The outcomes mea- health), national health care comprehensive system (i. In practice, when intermediate out- In considering whether the available studies suggest that comes are used, the health state and cost-effectiveness ratio newer antidepressants are cost-effective, we will limit our- is sometimes denoted simply in the native units of a single selves to addressing the question fromthe two perspectives domain (e. First, we ask, 'Are newer and value weights are not assigned. In fuller analyses, antidepressants cost-effective as first-line treatment from a weights are assigned to the benefits, and the weights are health care systemperspective? The most com- ate that the studies to be reviewed have utilized multiple mon generic unit is the quality-adjusted life year (QALY). Some studies im- The second category major category of health effects, plicitly or explicitly assume equal effectiveness of newer and indirect costs or productivity effects, refers to resource con- older antidepressants and ask whether the first-line use of sumption attributable to changes in productivity caused by newer antidepressants produces savings to the health care changes in morbidity or mortality. Others model or measure clinical benefit and sectors of health care, even if the specific intervention falls calculate average or incremental cost-effectiveness ratios. In more limited analyses, tions in design and methods. Most of the evidence regarding the categories are applied only in the specialty sector. The Second, we ask, 'Are newer antidepressants cost-effective many types of prices that can be assigned to resources, and as first-line treatment from a global societal perspective? The conclusions suggested by any given cost-effective- We also examine studies reporting relative rates of cost- ness analysis depend heavily on each of the factors we have effectiveness of the newer antidepressants. The conclusions of the analysis also depend on its particularly on the newer antidepressants and updating our perspective—that is, for whomis the treatment cost-effec- previous review (7).
CB1 re- It is now widely recognized that most of the neurobehavioral ceptors seem to be mostly restricted to spinal interneurons buy 100mg viagra sublingual, and peripheral actions of marijuana and THC result from rather than at the axonal level (45) 100mg viagra sublingual with mastercard, thus possibly accounting activation of selective receptors, two of which, named CB1 for spinal mechanisms of pain control ascribed to psycho- and CB2, have been cloned and characterized (33,34). However, indirect evidence also exists development of transgenic mice lacking the genes encoding for the presence of CB1 receptors in peripheral sensory affer- for either of these two receptors, the CB1 and CB2-receptor ents (46), a finding thus supporting the concept that canna- knockout mice (35–37), have provided conclusive evidence binoids may also exert analgesia at the peripheral level. The that the effects of THC on motor behavior, body tempera- presence of CB1 receptors in parasympathetic and sympa- ture, cardiovascular function, and nociception, on the one thetic fibers, on the other hand, may be at the basis of hand, and on some immunologic responses, on the other the vascular and smooth muscle–relaxing activity of THC hand, are mediated by CB1 and CB2 receptors, respectively. There is no evidence for the pres- malian tissues and have been found not only in the central ence of CB2 receptors in the central nervous system, except and peripheral nervous systems, but also in both male and for their expression in microglia. Clearly, given that CB2 female reproductive organs, immune cells, the gastrointesti- receptors seem to be mostly confined to cells of the immune nal tract, the liver, and the heart (38). In the central nervous system (34), it would not be surprising to find these proteins system, CB1 receptors are most abundant in the hippocam- only in those central nervous system cells deputed to im- pus (i. Lower density of CB1 receptors is present Studies have revealed that activation of the subunits of G /i in discrete nuclei of other brain regions such as the hypo- Go proteins, with subsequent inhibition of adenylate cyclase thalamus, brainstem, thalamus, and limbic forebrain, thus through both CB1 and CB2 receptors (47), blockade of volt- possibly accounting for THC activity on body temperature, age-activated calcium (Ca2 ) channels of the N- and P/Q- appetite, supraspinal mechanisms of pain perception, sen- type through CB1 receptors (48), and activation of inwardly sory perception, and mood or reward. CB1 receptors are rectifying potassium channels through CB1 receptors (49), associated with nerve fibers and axon terminals, but not may not be the sole intracellular signaling messages deliv- in the neuronal soma. This pattern is consistent with the ered by psychoactive cannabinoids. There is now evidence presynaptic inhibitory effects of cannabinoids on neuro- for the coupling of CB1, but not CB2 receptors, to Gs pro- transmitter release in the brain (see ref. CB1- teins, with consequent activation of adenylyl cyclase. It is expressing cells in mouse forebrain can be divided into dis- not clear yet whether this effect may explain the biphasic tinct neuronal subpopulations. Most of the cells that highly nature of cannabinoid effects on behavior in several tests. In the hippocampus, amygdala, and entorhinal cortex THC and synthetic and endogenous cannabinoids can area, CB1 mRNA is present at low but significant levels either stimulate (50) or inhibit (51) NO formation. The in many non-GABAergic cells that can be considered as former effect results in inhibition of dopamine release from projecting principal neurons. These data are in good agree- invertebrate ganglia, whereas the inhibition of NO release ment with the observation that cannabinoids act on princi- in granule cerebellar cells seems to result from inhibition pal glutamatergic circuits as well as modulate local GABAer- of voltage-activated Ca2 channels. In any case, modulation gic inhibitory circuits by inhibiting glutamate and GABA of NO levels may result in changes in cyclic guanosine Chapter 106: Marijuana 1523 monophosphate intracellular concentrations. Finally, pro- sients in HL60 cells through these receptors. Interestingly, tein phosphorylation catalyzed by mitogen-activated pro- in this study, AEA was shown to be a very weak and partial tein kinase is coupled to both CB1- and CB2-receptor stimu- agonist at CB2 receptors. This intracellular effect, together with agonist at CB2 receptors, AEA, and much more so its meta- inhibition of the cyclic adenosine monophosphate bolically stable analogues (R)-methanandamide and 2′-flu- (cAMP)–dependent protein kinase A, is at the basis of can- oro-2-methyl-arachidonoyl-ethanolamide, act as relatively nabinoid action on the expression of several genes such as potent (Ki between 12 and 100 nM) and selective CB1- krox-24 in HL60 cells (52) or the prolactin receptor and receptor agonists, and thus can be considered useful phar- the high-affinity receptors trk for the nerve growth factor in macologic tools for studies on the bioactivity of endocan- human breast cancer cells (53). Likewise, bly in part because of the rapid metabolism of this com- CB1-induced activation of focal adhesion kinase in hippo- pound both in vitro and in vivo (59), and because AEA is campal slices, an effect suggested to lead to modulation by a partial agonist in some functional assays of CB activity 1 cannabinoids of synaptic plasticity and learning, results (60). In the brain, AEA was shown to exert inhibitory ac- from inhibition of adenylate cyclase and protein kinase A. These ef- Endogenous Ligands (Endocannabinoids) fects probably result from the capability of AEA to induce, by activation of CB1 receptors, modulation of neurotrans- Since the mid-1990s, several fatty acid derivatives have been mitter (e. This neuromodula- substances, however, can displace high-affinity cannabinoid tory action may also underlie AEA regulation of hormone ligands from selective binding sites in membrane prepara- release at the level of the hypothalamus-pituitary-adrenal tions containing the CB1 or the CB2 receptor. Anandamide axis, as well as the antinociceptive effects of the compound (arachidonoylethanolamide, AEA), the amide of arachi- through both spinal and supraspinal mechanisms (63). The other prominent endoge- lated through the regulation of either their biosynthesis or nous ligand is a glycerol ester, 2-arachidonoyl glycerol inactivation. It is commonly accepted that the AEA and 2- (2-AG) (55). These compounds share the ability to bind to AG are not stored as such in cells, but rather are synthesized and to activate CB1 and (particularly in the case of 2-AG) 2 and are directly released by cells 'on demand,' after Ca CB2 receptors. Therefore, they induce a series of pharmaco- influx into the cell (such as that occurring in neurons on logic effects in vitro and in vivo that are, to some extent, depolarization or in mast cells after IgE-mediated activa- similar to those exerted by THC. Other fatty acid deriva- tion) and the hydrolysis of phospholipid precursors (40). The molecular mode of action nolamines (NAPEs) (64). This reaction is catalyzed by a of these latter compounds is still a subject for investigation.
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