Abstract:
:Normal myocardial cells actively uptake the radioisotope Thallium-201 and its myocardial distribution is a reflection of the existent regional coronary artery blood flow at the moment of the examination. Thallium-201 reaches quickly a high intracellular concentration and then leaves myocardial cells in a mean time of 4 to 8 h. In the presence of significant coronary artery disease, uptake and elimination rates of Thallium-201 are delayed in ischemic tissue, compared to normal tissue. This leads to regional differences in relative concentrations which allow to identify viable areas with insufficient coronary flow in conditions of vasodilatation induced by exercise or pharmacologic means. This phenomenon does not occur in the irreversibly damaged myocardium, and affected areas fail to uptake the radioisotope. Clinical applications of this test are: 1.--Search for coronary artery disease. 2.--Assessment of patients with known coronary artery disease. 3.--Evaluation of patients after revascularization procedures. 4.--Assessment of coronary risk before peripheral vascular surgery. 5.--Detection of viable myocardium. 6.--Assessment of coronary reserve in patients with angor and normal coronary vessels.
journal_name
Rev Med Chiljournal_title
Revista medica de Chileauthors
Dighero H,Canessa Jsubject
Has Abstractpub_date
1992-10-01 00:00:00pages
1158-61issue
10eissn
0034-9887issn
0717-6163journal_volume
120pub_type
杂志文章abstract::The echocardiographic identification of cardiac tumors as cause of embolic episodes is infrequent, and the finding of multiple papillary fibroelastoma is even less common. We report a 70 years old female with a history of a rheumatic mitral valve lesion, subjected to a commissurotomy in 1970. She was admitted with a c...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:2001-09-01 00:00:00
abstract:BACKGROUND:Culture is defined by the Webster's dictionary as acquaintance with and taste in fine arts, humanities, and broad aspects of science as distinguished from vocational and technical skills. AIM:To assess the general cultural knowledge of university students. MATERIAL AND METHODS:A test containing 58 question...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:/S0034-98872010000300005
更新日期:2010-03-01 00:00:00
abstract::Oncocytomas are tumors characterized by cells with an eosinophilic cytoplasm. Renal oncocytomas were described in 1942. Among 46 consecutive patients operated on for renal tumors, oncocytomas were found in 4 (8.7%). In spite of a supposedly benign nature, renal oncocytoma cannot be adequately differentiated from renal...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1992-05-01 00:00:00
abstract:BACKGROUND:Understanding how autonomous students are capable of regulating their own learning process is essential to develop self-directed teaching methods. AIM:To understand how self-directed medical students approach learning in medical schools at University of Concepción, Chile. MATERIAL AND METHODS:A qualitative...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/S0034-98872015001200011
更新日期:2015-12-01 00:00:00
abstract:BACKGROUND:Felodipine is a calcium channel inhibitor with high vascular selectivity. AIM:To study the effectiveness of felodipine in the treatment of essential hypertension in subjects older than 64 years old. PATIENTS AND OUTCOME:Fifty subjects were studied. After a washout period of four weeks, subjects received a ...
journal_title:Revista medica de Chile
pub_type: 临床试验,杂志文章
doi:
更新日期:1996-07-01 00:00:00
abstract:BACKGROUND:Maximal oxygen uptake is considered by the International Biological Programme as the international standard of cardiorespiratory adequacy and physical condition. AIM:To measure maximal oxygen uptake in normal Chilean subjects, to establish normal reference values. SUBJECTS AND METHODS:Maximal oxygen uptake...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1997-09-01 00:00:00
abstract:BACKGROUND:Scientific Ethics is the theory and praxis of decisions. Philosophical Ethics is presented as the theory and praxis of the good. As the good differs among cultures, Philosophical Ethics is dependent on the endo-cultural good conception. The decision (included that one of adhesion or not to a world vision) de...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:2001-05-01 00:00:00
abstract:BACKGROUND:Teenage pregnancy is a psychosocial and multifactorial problem described as a lack of exercise of rights in sexual and reproductive health. There are important aspects in the doctor-patient relationship and confidentiality that directly affect the continuity and quality of care. There are controversies in th...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/S0034-98872016001000004
更新日期:2016-10-01 00:00:00
abstract::Signet ring gallbladder carcinoma is a rare aggressive variant of mucinous adenocarcinoma with poor prognosis. Positron emission tomography/computed tomography (PET/CT) with Fluor18 deoxyglucose (F18-FDG) is a useful tool in the staging of gallbladder cancer. We report a 68 years old man with a surgically resected acu...
journal_title:Revista medica de Chile
pub_type:
doi:10.4067/S0034-98872017000400013
更新日期:2017-04-01 00:00:00
abstract:BACKGROUND:Bottled water consumption has currently increased and their fluoride (F) concentration may not be ideal in terms of caries benefit or risk of fluorosis. While low concentrations would have little anticaries effect, high F concentration would increase the risk of dental fluorosis. AIM:To measure F concentrat...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/S0034-98872014000500011
更新日期:2014-05-01 00:00:00
abstract:BACKGROUND:Adequate management of high blood pressure (HBP) and Type 2 Diabetes (DM2) is a challenge to the healthcare system in Chile. AIM:To evaluate the effectiveness of a case management (CM) approach to manage HBP and DMII at Primary Healthcare (PHC) level, headed by healthcare technicians with the supervision of...
journal_title:Revista medica de Chile
pub_type: 杂志文章,多中心研究
doi:10.4067/S0034-98872018001101269
更新日期:2018-11-01 00:00:00
abstract::The accrual of anatomical preparations since the nineteenth century in Santiago, Chile, became the so called "anatomical cabinet" under the supervision of professor Julio F Lafargue. Afterwards, this cabinet evolved to form an anatomical museum in the mid twentieth century. It contained preparations using corpses whos...
journal_title:Revista medica de Chile
pub_type: 历史文章,杂志文章
doi:10.4067/s0034-98872018001201459
更新日期:2018-12-01 00:00:00
abstract:BACKGROUND:In 1992, a consensus conference defined the terms systemic inflammatory response syndrome (SIRS), sepsis, severe sepsis and septic shock. Since then, numerous reports have validated the prognostic usefulness of these operative definitions. AIM:To evaluate if sepsis severity criteria, as defined by the Conse...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1999-11-01 00:00:00
abstract:BACKGROUND:Dopamine agonists (DA) effectively reduce tumor size of macroprolactinomas, with the consequent improvement of eventual visual impairment. AIM:To study the visual outcomes in patients with macroprolactinoma treated with DA. MATERIAL AND METHODS:Retrospective cohort study which included patients with macrop...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/S0034-98872013000600001
更新日期:2013-06-01 00:00:00
abstract::This is the conference given by Jorge Mardones, Emeritus Professor of the University of Chile on the occasion of receiving the Juvenal Hernández award. A biographical trace of Professor Mardones scientific career and its motivations, including his relation to outstanding Chilean scientists is included. A remembrance o...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1989-02-01 00:00:00
abstract::We describe the clinical features and immunophenotype of 500 children and 131 adults with acute lymphoblastic leukemia (ALL), diagnosed between 1984 and 1993. Cases were classified, according to immunophenotype in B-cell ALL with three subtypes (pro-B or null, common and B) and T-cell ALL. Among children, common ALL a...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1996-03-01 00:00:00
abstract::Splenic abscesses are infrequent and usually associated to sepsis and immunodepression. The diagnosis is commonly made in the necropsy. We report two cases of multiple splenic abscesses in type II diabetic patients that were diagnosed by ultrasound. Both patients were successfully managed with surgery (drainage of lef...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1993-05-01 00:00:00
abstract::Endothelial lipase (EL) is synthetized by endothelial cells and its main substrates are lipoprotein phospholipids. Over expression of EL reduces high density lipoprotein (HDL) cholesterol and phospholipids, in vivo and in vitro. Inhibition of the enzyme achieves the opposite effects. The synthesis of the enzyme is reg...
journal_title:Revista medica de Chile
pub_type: 杂志文章,评审
doi:10.4067/S0034-98872012000300015
更新日期:2012-03-01 00:00:00
abstract::Intracranial sinus thrombosis (1ST) after closed head injury is an uncommon but potentially serious complication. It has no correlation with the severity of the injury. The symptoms and clinical course are highly variable. The most frequent but least specific symptom is severe headache. Cerebral lesions and neurologic...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/S0034-98872013001200016
更新日期:2013-12-01 00:00:00
abstract::Inflammatory bowel disease (IBD) is a prevalent chronic disorder, often diagnosed during childhood. Studies have suggested that the incidence of IBD in this group of patients is increasing. Children and adolescents with IBD frequently have more extensive and severe disease than adults. Transition is an important conce...
journal_title:Revista medica de Chile
pub_type: 杂志文章,评审
doi:10.4067/S0034-98872015000600010
更新日期:2015-06-01 00:00:00
abstract:BACKGROUND:There are several diagnostic criteria for Metabolic Syndrome (MS) definition. AIM:To study their application in the Chilean general adult population. MATERIAL AND METHODS:We analyzed data from a random sub sample of 1.833 adults aged 17 years and older surveyed during the First Chilean National Health Surv...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/s0034-98872010000600007
更新日期:2010-06-01 00:00:00
abstract::Using mapping techniques, 32 consecutive gallbladder carcinomas diagnosed in our department were studied. The defined lesions were dysplasia, carcinoma in situ and superficial spreading carcinoma. A total of 2257 lesions were recorded from 1072 inclusions. All the defined lesions were present in about 10% of all secti...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1993-01-01 00:00:00
abstract::The decrease in mortality in critical patient units led to an increase in intensive care unit acquired weakness (ICUAW), which significantly affects the functional performance and quality of life of patients. There are several scales that measure functionality in critical patients. The aim of this systematic review is...
journal_title:Revista medica de Chile
pub_type: 杂志文章,评审
doi:10.4067/s0034-98872017000901137
更新日期:2017-09-01 00:00:00
abstract:BACKGROUND:Parents have a control role in the development and treatment of eating disorders among teenagers. AIM:To compare attitudes, beliefs and behaviors between mothers of patients with eating disorders and mothers of teenagers without these disorders. MATERIAL AND METHODS:Twenty one mother-sibling pairs of adole...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:/S0034-98872009000600008
更新日期:2009-06-01 00:00:00
abstract::Mycoplasma infections have extrapulmonary manifestations that may be associated with respiratory symptoms and may have skin, heart, gastrointestinal, rheumatologic, neurologic, hematologic involvement. Cold agglutinin mediated autoimmune hemolytic anemia is the most common hematological manifestation. We report a 27-y...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/S0034-98872014001000015
更新日期:2014-10-01 00:00:00
abstract::In a double blind study, 20 patients who presented with acute episodes of asthma were randomized to treatment with nebulized salbutamol (5 mg) of subcutaneous salbutamol (0.5 mg). The clinical conditions were not significantly different before or after treatment in both groups. Significant bronchial dilation was obtai...
journal_title:Revista medica de Chile
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:1992-02-01 00:00:00
abstract:BACKGROUND:Poor oral health status may have an impact on the health status of patients with chronic renal failure. AIM:To describe the oral health status of a group of Brazilian patients with chronic renal failure. MATERIAL AND METHODS:Retrospective review of the medical records of patients with chronic renal failure...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:/S0034-98872008000600008
更新日期:2008-06-01 00:00:00
abstract::Brain functioning is mainly intrinsic, not primarily reflexive. This is supported by the high energy requirements of the resting brain (20% of all the energy consumed) which only marginally increases with changes in brain activity. Modern neuroimaging and neurophysiological techniques have led to the discovery of the ...
journal_title:Revista medica de Chile
pub_type: 杂志文章,评审
doi:10.4067/S0034-98872013000300014
更新日期:2013-03-01 00:00:00
abstract:BACKGROUNDS AND AIMS:Total parenteral nutrition (TPN) has been traditionally used as an adjunctive therapy in severe ulcerative colitis patients. We performed a prospective study to ascertain the safety, nutritional efficiency, tolerance and costs of total enteral nutrition in this situation. METHODS:After 48 hours of...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1998-08-01 00:00:00
abstract::We report a 44 years old male, presenting with an eight months history of right lower quadrant pain, diarrhea and weight loss. Colonoscopy showed a proliferative and ulcerated lesion in the cecum, with necrotic areas. Barium enema showed an extensive irregular stenosis with rigidity of cecum and ascending colon. The e...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1999-06-01 00:00:00