Abstract:
:Severe myocardial ischemia and infarction cause release of catecholamines, with exposure of injured myocardial cells to relatively high concentrations during the transitional period in which myocyte injury worsens. In experimental animals, the number of beta-adrenergic receptors increases markedly without any change in affinity within one hour of coronary artery occlusion, and the number of alpha-adrenergic receptors also increases. Stimulation by exogenous cate-cholamines during a period of reperfusion one hour after temporary coronary occlusion is associated with an enhanced biochemical response in the ischemic myocardium. Administration of beta-adrenergic blockers prior to or within a few minutes after occlusion limits the extent of myocardial necrosis. In clinical studies, administration of propranolol, timolol, or metoprolol has been shown to significantly reduce the mortality rate after myocardial infarction (MI). Administration of timolol or metoprolol also reduces the frequency of recurrent MI. Beta-adrenergic blockers may prolong life and reduce the risk for recurrent MI by antagonizing and/or preventing basic biologic alterations in injured myocytes and/or by antagonizing detrimental effects of the relatively high concentrations of catecholamines to which these cells are exposed. Increased number of beta-adrenergic receptors, the ability to translate adrenergic stimulation into intracellular metabolic events, and increased local concentrations of catecholamines may be important factors in arrhythmogenesis and myocyte injury during severe myocardial ischemia and evolving MI.
journal_name
Postgrad Medjournal_title
Postgraduate medicineauthors
Willerson JT,Buja LMsubject
Has Abstractpub_date
1988-02-29 00:00:00pages
27-32eissn
0032-5481issn
1941-9260journal_volume
Spec Nopub_type
杂志文章,评审abstract::Head trauma in the elderly is a major source of morbidity and mortality in this population. Prevention of the primary injury is ideal and requires that the primary care physician understands the neurosensory changes of aging. Failing prevention, rapid diagnosis and efficient management of the traumatized patient are o...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1988.11700292
更新日期:1988-05-15 00:00:00
abstract::As understanding of the natural history of breast cancer has increased, radical mastectomy has given way to a preference for breast-sparing surgery and greater reliance on radiation therapy and chemotherapy. Probably the most important factor for selection of treatment is consultation with a multidisciplinary team ski...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.1080/00325481.1989.11704444
更新日期:1989-10-01 00:00:00
abstract::The goal of screening for colorectal cancer is to find early, asymptomatic cancers and adenomatous polyps that are 1 cm or more in diameter or that are villous or tubulovillous histologically. A study using fecal occult blood testing with rehydration and no sigmoidoscopy found that deaths from colorectal cancer can be...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:
更新日期:1994-07-01 00:00:00
abstract::The term "enteropathic arthritis" describes joint manifestations that occur in conjunction with gastrointestinal disease. Underlying causes include inflammatory bowel disease, reactive arthritis, iatrogenic disease. Whipple's disease, and other gastrointestinal diseases. A possible association between Reiter's syndrom...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.1080/00325481.1989.11704368
更新日期:1989-08-01 00:00:00
abstract::Coronary artery disease (CAD) remains the major cardiovascular health issue in contemporary clinical practice. Treatment options for multivessel CAD include medical therapy, percutaneous coronary intervention (PCI), and coronary artery bypass grafting (CABG). Here, the authors review the most recent data that compare ...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.3810/pgm.2005.12.1670
更新日期:2005-12-01 00:00:00
abstract::Fungal infections usually have characteristics that make them easily identifiable. In most cases, clinical diagnosis can be readily confirmed by examining the lesions under Wood's light or by placing infected material in potassium hydroxide solution and examining the preparation microscopically. Dermatophytes can be r...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1976.11714412
更新日期:1976-07-01 00:00:00
abstract::Contrary to popular belief, hypoglycemia is an infrequently encountered condition and its presence is questionable until confirmed by appropriate tests. In ambulatory patients, blood glucose levels obtained during intake of a normal diet are more reliable than those obtained during a glucose tolerance test. If the blo...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1987.11700028
更新日期:1987-11-01 00:00:00
abstract::Two cases of subclavian steal syndrome are reported. Symptoms included light-headedness or syncope, reflecting vertebrobasilar insufficiency, and in one case, numbness and tingling in the left upper extremity, reflecting ischemia. Many persons with this syndrome are asymptomatic. Key findings include unilaterally decr...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1988.11700138
更新日期:1988-02-01 00:00:00
abstract::The role of reflux in the development of esophagitis, stricture, and Barrett's esophagus is well recognized. However, reflux is not an infrequent cause of atypical chest pain, chronic pulmonary disorders, and pharyngeal and laryngeal changes. Increased insight into the pathogenesis of reflux and the relationship betwe...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:
更新日期:1996-04-01 00:00:00
abstract::An understanding of the causes and course of acute allergic contact dermatitis aids in recognition of this common problem. The most frequent cause is the Rhus group (poison ivy, oak, and sumac), and a large percentage of the US population is sensitized to this group of allergens. With severe cases, prompt administrati...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1990.11704608
更新日期:1990-03-01 00:00:00
abstract::Preview No physician would treat hypertension without monitoring blood pressure, but some treat bronchial asthma without objectively measuring pulmonary function. This empirical approach is inappropriate, according to the authors, who discuss key measurements that should be taken to assess disease status, guide therap...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1995.11946003
更新日期:1995-06-01 00:00:00
abstract::The end point in peptic ulcer disease is a crater in the mucosa. The cause of gastric ulcers seems to be the breakdown of defensive factors, which then allows damage from endogenous and/or exogenous aggressive factors. Aggressive factors are more important in duodenal ulcer formation. Treatment options discussed herei...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.1080/00325481.1993.11701642
更新日期:1993-03-01 00:00:00
abstract::If frostbite is to be treated successfully, direct and indirect effects of injury must be understood. Rapid rewarming helps to preserve tissue by limiting the amount of direct cellular injury. Selective management of blisters helps protect the subdermal plexus, and application of Aloe vera cream (eg, Dermaide Aloe Cre...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1990.11704769
更新日期:1990-12-01 00:00:00
abstract::Because of the large number of potentially injurious chemicals present in the home and workplace, chemical burns pose a unique challenge to the health care professional. For the majority of injuries, prompt and prolonged hydrotherapy is the cornerstone of therapy. The clinician needs to remember that the extent and de...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1985.11699164
更新日期:1985-10-01 00:00:00
abstract::Objective: To examine the mean carotid intima-media thickness (CIMT) and potentially relevant determinants of increased CIMT in elders. Method: Stroke-free and cardiovascular disease-free residents aged ≥65 years were recruited in a low-income population in China. B-mode ultrasonography was performed to measure CIMT. ...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.2020.1757266
更新日期:2020-08-01 00:00:00
abstract::Heparin and warfarin sodium (Coumadin, Panwarfin, Sofarin) are used most often to treat acute and recurrent venous thromboembolic disease, arterial disease, valvular heart disease, and atrial fibrillation. These agents along with dextran, pneumatic compression devices, and gradient stockings are also used to prevent d...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1991.11700985
更新日期:1991-07-01 00:00:00
abstract::Most changes that occur in the aging face are related to gravity working on skin that is becoming progressively thinner, drier, and less elastic. Exposure to sunlight hastens these changes, and protection from the sun is the only proved way to delay them. Dermabrasion, chemabrasion, and collagen implant (Zyderm) injec...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1984.11698794
更新日期:1984-11-15 00:00:00
abstract::The evaluation of the bleeding patient starts with the integration of data from the history and physical examination. From this results either one probable explanation that can easily be substatniated by laboratory studies or, as more commonly occurs in practice, several possibilities that are reasonable and must be i...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1977.11712257
更新日期:1977-07-01 00:00:00
abstract:BACKGROUND:Binge eating disorder (BED) is now a formal diagnosis in the Diagnostic and Statistical Manual of Mental Disorders, fifth edition (DSM-5). However, post-DSM-5 patient profiles and viewpoints on BED diagnosis and treatment remain unclear. This study used a focus group methodology to examine demographic and cl...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.3810/pgm.2014.09.2800
更新日期:2014-09-01 00:00:00
abstract::The first step in evaluation of a presumed seizure is to determine whether the event was indeed a seizure and which diagnostic studies are needed. The second step is to correctly diagnose the seizure on the basis of the medical history and findings from the physical, neurologic, and laboratory evaluation. The third st...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.3810/pgm.2002.01.1074
更新日期:2002-01-01 00:00:00
abstract::Preview The number of cardiac drugs is growing every day, and their indications are changing as more is learned about each one. Choosing the appropriate drug for each patient is made difficult by these complexities, especially when a patient has already had a heart attack. The authors review the latest trials of the m...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1993.11945746
更新日期:1993-11-01 00:00:00
abstract::The patient with jaundice may be accurately diagnosed through clinical history, physical findings, and noninvasive laboratory and radiologic examinations available in most community hospitals. Ultrasonography is usually the procedure of choice in initial evaluation, but if acute cholecystitis is suspected, hepatobilia...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:
更新日期:1987-01-01 00:00:00
abstract::In 90% of children, otitis media with effusion resolves within 3 months. When it persists longer, it is considered chronic. Initial treatment of chronic otitis media with effusion is repeated courses of antibiotics, and a short course of steroids may be appropriate. Use of antihistamines and decongestants has not been...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:
更新日期:1995-01-01 00:00:00
abstract::More than 70 medications have been implicated as a cause of drug-induced lupus. The condition most commonly manifests with arthralgias and fever. The most important laboratory feature is an elevated antinuclear antibody titer, which often corresponds to the presence of antihistone antibodies. Fortunately, the course o...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.3810/pgm.1996.09.83
更新日期:1996-09-01 00:00:00
abstract::Extracorporeal shock wave lithotripsy has become a valuable asset to the urologist and greatly benefits urologic stone patients. Eight years of clinical use have proven its clinical efficacy, with more than 400,000 successfully performed treatments worldwide. In a short period of time, ESWL has completely changed the ...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1988.11700265
更新日期:1988-05-01 00:00:00
abstract::Nearly every healthcare reform plan introduced in Congress this year addresses medical malpractice. Although the tort reform goals in the plans may be similar, the methods of achieving them differ substantially. To highlight the areas that need to be resolved, we set up a dialogue between a physician and a plaintiff's...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1994.11945900
更新日期:1994-10-01 00:00:00
abstract:BACKGROUND:The use of 2-way audiovisual (AV) technology for delivery of acute stroke evaluation and management, termed "telestroke," is supported by a rapidly growing literature base. A systematic review that provides a comprehensive, easily digestible overview of telestroke science and practice is lacking. PURPOSE:To...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.3810/pgm.2013.01.2623
更新日期:2013-01-01 00:00:00
abstract::Technical advances over the past few years have rapidly increased the possibilities for filmless radiology services provided by PACS. Such systems are also financially feasible for many healthcare practices, primarily because of the goals achieved through increased efficiency and improved patient care. In coming years...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.3810/pgm.2001.06.960
更新日期:2001-06-01 00:00:00
abstract::A study was undertaken to determine whether the platelet estimate included in the routine CBC is being utilized as a guide to ordering quantitative platelet counts. Requisition slips and results were reviewed for a one-month period. The data showed that platelet estimates were not being used properly. In fact, much of...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1980.11715507
更新日期:1980-08-01 00:00:00
abstract::Preview Congestive heart failure (CHF) is a common and serious problem, and its diagnosis and treatment should not be the exclusive province of the cardiologist. Primary care physicians can very adequately manage most cases in a cost-effective manner. In this article, Dr Seager gives guidelines for a standard approach...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1995.11946074
更新日期:1995-11-01 00:00:00