Abstract:
:Catecholamine stimulation increases the heart rate and the force of cardiac contraction. Cardiac output then increases, with a decrease occurring in total peripheral resistance due to smooth muscle dilation in the vascular beds of the muscle and heart, though there is constriction of the skin and viscera; this leads to a net decrease in total peripheral resistance. Consequently, systolic pressure rises and diastolic pressure falls. The net effect is to increase myocardial oxygen demand. Smoking stimulates catecholamine secretion and may therefore be expected to have detrimental effects in patients with angina. In a double-blind study of ten patients with stable angina pectoris treated with nifedipine, propranolol, and atenolol, smoking was found to have direct and adverse effects on the heart and to interfere with the efficacy of all three antianginal drugs, but with that of nifedipine the most. Differences between the two beta blockers may be related, at least in part, to the known different metabolic pathways of these drugs.
journal_name
Postgrad Medjournal_title
Postgraduate medicineauthors
Fox KMsubject
Has Abstractpub_date
1988-02-29 00:00:00pages
148-51eissn
0032-5481issn
1941-9260journal_volume
Spec Nopub_type
临床试验,杂志文章,评审abstract::Immunization of infants and children is the most effective strategy for decreasing the incidence of some infectious diseases. Most invasive disease due to Haemophilus influenzae type b occurs before age 5 years, and routine vaccination of infants for hepatitis B is currently recommended because selective immunization ...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:
更新日期:1995-11-01 00:00:00
abstract::Not since the early 1950s has the number of new cases of syphilis been as high as it is now. The infectious agent, Treponema pallidum, is extremely difficult to culture in vitro and almost impossible to see by conventional light microscopy. A nonspecific antibody test is used for screening and a specific treponemal an...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.1080/00325481.1990.11704578
更新日期:1990-02-15 00:00:00
abstract::Inflammatory bowel disease (IBD) is difficult to diagnose, and differentiating between ulcerative colitis (UC) and Crohn's disease (CD) can be challenging. Overlapping symptoms of UC and CD often delay diagnosis, despite availability of endoscopic, radiologic, and histologic tools. This delay in diagnosis is quite com...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.3810/pgm.2010.07.2184
更新日期:2010-07-01 00:00:00
abstract::Heart transplantation is the treatment of choice for a select group of patients with end-stage heart failure. Survival rates have increased and complication rates have decreased due to better immunosuppressive agents, improvement in organ procurement and surgical technique, and overall increase in experience for perfo...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.3810/pgm.2012.07.2563
更新日期:2012-07-01 00:00:00
abstract:BACKGROUND:Symptoms of irritable bowel syndrome (IBS) can have a profound impact on emotional health and quality of life, and current treatments are sometimes unsatisfactory for patients facing this lifelong disease. Probiotics, which can normalize gastrointestinal microflora, may alleviate symptoms of IBS. OBJECTIVE:...
journal_title:Postgraduate medicine
pub_type: 杂志文章,随机对照试验
doi:10.3810/pgm.2009.03.1984
更新日期:2009-03-01 00:00:00
abstract::Proper treatment of non-insulin-dependent (type II) diabetes presents the physician with a number of choices. Diet and exercise should be tried first in many patients; if this regimen is unsuccessful, treatment with either insulin or a first- or second-generation sulfonylurea must be considered. Theoretically, second-...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1987.11699825
更新日期:1987-05-01 00:00:00
abstract::In a case of rheumatic disease, the patient's history and a careful physical examination should yield most of the information needed to identify the specific disorder present. A convenient classification is based on four differentiating features: number of joints affected, acuteness or chronicity of disease, absence o...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1976.11708414
更新日期:1976-12-01 00:00:00
abstract::Drug acquisition cost is an important component in the analysis of economic and clinical outcomes in the treatment of respiratory tract infections (RTIs). However, bacterial resistance has emerged as a crucial variable that must also be considered. Drug-resistant infections result in more expensive drug therapy, longe...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.3810/pgm.09.2002.suppl19.100
更新日期:2002-09-01 00:00:00
abstract::The Food and Drug Administration's approval of the excimer laser in 1995 heralded the age of laser refractive surgery in the United States. Since then, other advances in refractive surgery have spurred great public interest in and enthusiasm for these procedures. In this article, the authors review the major types of ...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.3810/pgm.1999.09.683
更新日期:1999-09-01 00:00:00
abstract:BACKGROUND:Point-of-care testing (POCT) is widely used to measure blood glucose levels in people with diabetes, although its use in measuring glycated hemoglobin (HbA1c) levels is less common, perhaps due to perceived performance issues and access to the technology. METHODS:Forty blood samples were analyzed in duplica...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.3810/pgm.2013.05.2664
更新日期:2013-05-01 00:00:00
abstract::A high index of suspicion and careful application of diagnostic methods are essential for accurate diagnosis of parasitic bowel diseases. The varied clinical spectrum of giardiasis, amebiasis, and strongyloidiasis emphasizes the need to consider these pathogens when patients present with gastrointestinal complaints. G...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.1080/00325481.1982.11716069
更新日期:1982-05-01 00:00:00
abstract::In the evaluation of male and female infertility the history, family history, physical examination, and endocrine and gonadal functional evaluations are the most informative measures. The cause of the infertility is never found in some 17.5% of couples and in almost one fourth of males. In over one third of cases male...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1979.11715204
更新日期:1979-07-01 00:00:00
abstract::Oxygen therapy is tremendously valuable for patients with chronic respiratory insufficiency. A physician's prescription is needed to obtain Medicare, Medicaid, or insurance-company reimbursement, and certain guidelines must be followed: Patients are selected if significant hypoxemia is present, appropriate pharmacolog...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1988.11700464
更新日期:1988-11-01 00:00:00
abstract::Lyme disease can be difficult to recognize because not all patients have erythema migrans or other classic symptoms. Therefore, laboratory testing has become an important aid to clinical diagnosis. But the story doesn't end there-serologic testing presents another set of problems and concerns. Drs. Still and Ryan expl...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.3810/pgm.1997.07.260
更新日期:1997-07-01 00:00:00
abstract::To aid in making care of HIV-infected patients part of your office routine, Dr Coodley presents here a checklist that combines the various clinical aspects of initial management. Covering the steps from the history to plans for follow-up, this article should allay anxiety and promote confidence in your entire staff by...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.1080/00325481.1993.11701640
更新日期:1993-03-01 00:00:00
abstract::Bedside pulmonary artery catheterization has proven to be an important addition to the clinical assessment of critically ill patients. Properly used, the procedure may provide hemodynamic information that is not apparent from physical examination or radiography. It may be safely accomplished through various venous rou...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.1080/00325481.1991.11700825
更新日期:1991-02-01 00:00:00
abstract::Bronchiectasis is characterized by permanent, abnormal dilation of the bronchi with chronic inflammation and infection. Bronchiectasis is either caused by or associated with several systemic disorders, and in a significant number of cases, the underlying etiology remains unidentified and is subsequently referred to as...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.3810/pgm.2008.09.1912
更新日期:2008-09-01 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::Although fairly common, syncope is a frightening symptom that can signal a serious underlying disease. The varying causes present a diagnostic challenge to the examining physician, who needs to assess whether referral for more specialized or invasive study is appropriate. The authors review common cases of syncope and...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.1080/00325481.1992.11701298
更新日期:1992-04-01 00:00:00
abstract::Thymomas may be discovered during routine evaluation, through reported symptoms, or increasingly, during evaluation for myasthenia gravis. Histologic details of these tumors have little bearing on prognosis or evaluation of malignant potential. Malignancy is determined by evidence of invasion through the tumor capsule...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1986.11699321
更新日期:1986-03-01 00:00:00
abstract::Eradication of H pylori and cure of peptic ulcer disease are possible if effective regimens are used correctly. Treatment markedly improves clinical outcomes and significantly decreases cost of care. As primary care physicians take a larger role in management of these infections, they need to understand the importance...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.3810/pgm.1998.03.423
更新日期:1998-03-01 00:00:00
abstract::The esophageal obturator airway is a relatively new addition to equipment for emergency resuscitation. It is simple to use after minimal training and can be inserted quickly without laryngoscopic visualization. Problems are uncommon. ...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1980.11715374
更新日期:1980-02-01 00:00:00
abstract::Primary adrenal insufficiency due to tumor involvement is very rare. We herein report a case of adrenal insufficiency caused by cancer metastasis to a remaining single adrenal gland in a renal cell carcinoma patient who had undergone radical nephrectomy including removal of the right adrenal gland. The patient present...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.2019.1696581
更新日期:2020-04-01 00:00:00
abstract::Pain is among the most common reasons patients seek medical attention, and the care of patients with pain is a significant problem in the United States. Acute pain (mild-to-moderate intensity) represents one of the most frequent complaints encountered by primary care physicians (PCPs) and accounts for nearly half of p...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.3810/pgm.2011.03.2270
更新日期:2011-03-01 00:00:00
abstract:BACKGROUND:Adults with attention-deficit/hyperactivity disorder treated with atomoxetine were examined for time-to-onset and -resolution of common treatment-emergent adverse events (TEAEs) and male sexual dysfunction, and for changes in blood pressure (BP) and heart rate (HR) upon atomoxetine discontinuation. METHODS:...
journal_title:Postgraduate medicine
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1080/00325481.2015.1083394
更新日期:2015-01-01 00:00:00
abstract::Cervical spondylotic myelopathy remains a diagnostic and therapeutic challenge to physicians in a number of specialties. The diagnostic evaluation consists of a comprehensive neurologic and orthopedic examination supplemented by appropriate neurophysiologic and neuroradiologic studies. Currently, magnetic resonance im...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.1080/00325481.1990.11704741
更新日期:1990-09-01 00:00:00
abstract::Metformin is a first-line pharmacological treatment for patients with type 2 diabetes mellitus because of its favorable overall profile, including its glucose-lowering ability, weight-neutral effects, and low risk of hypoglycemia; however, gastrointestinal (GI) intolerance may limit use in some patients. Extended-rele...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.3810/pgm.2011.01.2241
更新日期:2011-01-01 00:00:00
abstract::No single therapeutic agent has been found to be universally effective for rheumatoid arthritis, so regimens using combinations of drugs have become the rule. Recently, several new agents with unique mechanisms of action have been introduced and found to produce various degrees of clinical benefit. Among these agents ...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.3810/pgm.1999.10.1.703
更新日期:1999-10-01 00:00:00
abstract::Myasthenia gravis most commonly affects the ocular muscles. Abnormal fatigability of the involved muscle groups is the most remarkable feature of the physical examination. Recent studies have demonstrated that a thymus-derived antibody plays a role in the pathogenesis of myasthenia gravis, which is now thought to be a...
journal_title:Postgraduate medicine
pub_type: 杂志文章
doi:10.1080/00325481.1979.11715218
更新日期:1979-08-01 00:00:00
abstract::A carefully taken history and thorough physical examination remain the most crucial aspects of diagnosing rheumatic disorders. Non-rheumatologic conditions also need to be kept in mind. Laboratory tests should be looked on as mostly supportive or confirmatory, because many of the tests are relatively nonspecific and m...
journal_title:Postgraduate medicine
pub_type: 杂志文章,评审
doi:10.1080/00325481.1991.11700818
更新日期:1991-02-01 00:00:00