77 research outputs found
Thirty-Three Years of Cerebrovascular Laboratory at University Department of Neurology, Sestre milosrdnice University Hospital, Zagreb
Nalazi CDFI i PDI kod ekstrakranijske arterijske bolesti
The development of duplex ultrasound instrumentation combining high-resolution B-mode imaging with Doppler flow analysis represents a major advancement in ultrasound cerebrovascular diagnosis. Duplex sonography enables not only estimation of arterial stenosis, but allows for visualization of the plaque morphology. The principal arterial abnormality detectable with B-mode sonography is plaque, which appears as echogenic material that thickens the arterial wall and obliterates the lucent zone between the intimal reflection and the adventitia. When an atherosclerotic plaque is detected, its severity, extent, morphology and location must be analyzed. The most common site of atherosclerotic plaque formation is at the carotid bifurcation. The European Carotid Surgery Trial (ECST) and North American Symptomatic Carotid Endarterectomy Trial (NASCET) have shown that the degree of internal carotid artery stenosis is a major predictor of ipsilateral ischemic stroke in patients presenting with transient ischemic attack or minor ischemic stroke. The main location of vertebral stenosis or occlusion is the origin (V0 segment), less commonly more distally in the cervical region (V1 segment) or intracranially (V4 segment). The left subclavian artery is more often affected by atherosclerosis than truncus brachiocephalicus. The main characteristic of occlusion or stenosis of truncus brachiocephalicus are spectral changes in the right subclavian, carotid and vertebral artery. Cerebral ischemia is the most serious consequence of cervical artery dissection. Internal carotid artery is the most commonly affected vessel. In extreme cases, artery dissections can extend from the aorta to the subclavian, carotid and vertebral arteries. The term āvasculitisā encompasses a heterogeneous group of multisystemic disorders; CDFI examination demonstrates thickening of the arterial wall, usually circumferential, stenosis or occlusion of the arteries.Razvoj ultrazvuÄnih dupleks ureÄaja koji ujedinjuju B-prikaz visoke rezolucije sa spektralnom krivuljom pridonio je znaÄajnom napretku u dijagnostici cerebrovaskularnih bolesti. Dupleks ultrasonografija omoguÄuje ne samo procjenu stupnja stenoze, nego i prikaz morfologije plaka. NajÄeÅ”Äi poremeÄaj krvnih žila vidljiv pomoÄu B-prikaza je plak koji se prikazuje kao ehogena struktura koja zadebljava stjenku arterije i obliterira prostor izmeÄu intimalne refleksije i adventicije. Kada se prikaže aterosklerotski plak, treba analizirati njegov položaj, prostiranje, morfologiju i stupanj stenoze. NajÄeÅ”Äe mjesto stvaranja aterosklerotskog plaka je karotidna bifurkacija. Studije European Carotid Surgery Trial (ECST) i North American Symptomatic Carotid Endarterectomy Trial (NASCET) pokazale su da je stupanj stenoze unutarnje karotidne arterije najvažniji predskazatelj istostranog ishemijskog udara u bolesnika s prolaznim ishemijskim napadajem ili blažim oblikom moždanog udara. NajÄeÅ”Äe mjesto stenoze ili okluzije vertebralnih arterija je polaziÅ”te (segment V0), a rjeÄe distalno u cervikalnom dijelu(segment V1) ili intrakranijski (segment V4). Lijeva subklavijska arterija ÄeÅ”Äe je zahvaÄena aterosklerotskim promjenama nego brahiocefalni trunkus. Glavno obilježje okluzije ili stenoze brahiocefalnog trunkusa je promjena spektra u desnoj subklavijskoj, karotidnoj i vertebralnoj arteriji. Moždana ishemija je najozbiljnija posljedica disekcije vratnih arterija. NajÄeÅ”Äe je zahvaÄena unutarnja karotidna arterija. U krajnjim sluÄajevima disekcija se može protezati od aorte do subklavijskih, karotidnih i vertebralnih arterija. Pojam vaskulitis obuhvaÄa heterogenu skupinu multisistemskih poremeÄaja. UltrazvuÄnom (dupleks) pretragom prikazuje se zadebljanje stijenki arterija, najÄeÅ”Äe cirkumferentno, stenoza ili okluzija arterija
Hepatoprotective effects of BPC-157 - paracetamol overdose
Paracetamol, also known as acetaminophen, is a widely used medication to treat pain and fever. As itās one of the over-the-counter medications, itās
easily accessible to everyone. Its mechanism of action is the inhibition of prostaglandin synthesis in the CNS to reduce hyperalgesia. It also influences the thermoregulatory center in the hypothalamus and lowers fever. 90-95% of paracetamol is metabolized in the liver where itās conjugated with glucuronic acid and sulfates into inactive metabolites, and the rest via cytochrome-p450. Its main side effect is hepatotoxicity and acute liver injury. Here we investigate the hepatoprotective effects of BPC-157 while administering a toxic dose of paracetamol intraperitoneally in rats
ISOSORBIDE-5-MONONITRATE INDUCED PERIPHERAL AND CENTRAL VASCULAR DYSFUNCTION IN RATS AND TRETMENT WITH STABLE GASTRIC PENTADECAPEPTIDE BPC 157
Introduction: Although the understanding of migraine pathophysiology is incomplete, it is now well accepted that this neurovascular syndrome is
mainly due to cranial vasodilation. Several experimental migraine models have been developed, including the use of a nitric oxide (NO) donor, such as isosorbide-5-mononitrate (IS-5-MN). Nitric oxide regulates cerebral and extracerebral cranial blood flow and arterial diameters. We observed the therapeutic effects of stable gastric pentadecapeptide BPC 157 on peripheral and central vascular dysfunction caused by IS-5- MN administration
Znanstveni pristup migreni
Migraine is a common episodic headache disorder; prevalence of migraine in most western countries is 10-12%. The mechanism of migraine pain development is not fully understood. The theory of neurogenic inflammation proposes that the main event is the inflammation in the vessel wall which leads to leakage of nociceptive substances, causing thickening of the vessel wall and dilatation of vascular smooth muscles. The release of vasoactive neuropeptides causes depolarization of trigeminal perivascular axons, thus causing pain. Triptans are recommended for acute migraine attacks; studies have shown that their use increases productivity at work and improves the quality of life. Preventive therapy is recommended in migraine patients with frequent, severe, long-lasting attacks, in cases where acute therapy is not efficient, if there is a contraindication to the drug, failure or unbearable side-effects from acute treatments, overuse of acute medications or in special cases such as hemiplegic migraine. Beta-blockers and tricyclic antidepressants were often used as first line therapy for migraine prevention. Other p reventive drugs include pizotifen, flunarizine, and anticonvulsives. Migraine is often associated with a number of commorbid diseases: allergies, hypotension, epilepsy, fatigue sy, gastritis, iritabile colon disease, vertigo; therefore, preventive and acute therapy should be tailored individually.Migrena je Äesta glavobolja Äija se prevalencija kreÄe u zapadnim zemljama izmeÄu 10- 12%. Mehanizam boli kod migrene nije sasvim razjaÅ”njen. Po teoriji neurogene upale glavno zbivanje je upala stijenki krvnih žila koja dovodi do istjecanja nociceptivnih supstanci Å”to uzrokuje zadebljanje zida arterija te dilataciju glatkih miÅ”iÄnih stanica. OtpuÅ”tanje vazoaktivnih neuropeptida uzrokuje depolarizaciju trigeminalnih aksona Å”to dovodi do pojave boli. Triptani se preporuÄaju u akutnim napadajima migrene; istraživanja su pokazala da se njihovom upotrebom u akutnom napadaju migrene poveÄava produktivnost na poslu i poboljÅ”ava kvaliteta života. Preventivna terapija se preporuÄa kod osoba s uÄestalim jakim i dugotrajnim napadajima, te u sluÄajevima kada akutna terapija nije uÄinkovita, ukoliko postoji kontraindikacija ili su izražene nuspojave za primjenu akutne terapije, te u sluÄajevima kada se radi o obiteljskoj hemiplegijskoj migreni. U preventivnoj terapiji preporuÄaju se beta blokatori i tricikliÄki antidepresivi a od ostalih lijekova se preporuÄaju pizotifen, flunarizin te antiepileptici. Migrena je Äesto udružena s komorbidnim bolestima poput alergija, hipotenzije, epilepsija, sindromom kroniÄnog umora, iritabilnim kolonom, gastritisom i vertigom; stoga se akutna i profilaktiÄka terapija moraju individualno odreÄivati
The effects of a varying doses of pilocarpine and lithium induced status epilepticus, and treatment with BPC-157
Peptadecapeptide BPC -157 has been reported to have a large spectrum of in vivo activities, from anti-ulcer to central action on the brain dopaminergic system, in addition to the aforementioned, BPC-157 might counteract standard convulsant induced seizures, insulin-, paracetamol-, alcohol withdrawal- and serotonin-syndrome-induced convulsion. The pilocarpine model of temporal lobe epilepsy uses a cholinomimetic convulsant, pilocarpine, to induce status epilepticus; as a result, hippocampal damage occurs thus resulting in the development of spontaneous recurrent seizures. In rats, pilocarpine can be administered with lithium, thus significantly reducing the pilocarpine dose required to induce status epilepticus and resulting in a higher percentage of animals developing status epilepticus
- ā¦