Abstract:
BACKGROUND:Left bundle-branch block (BBB) is considered an important predictor of poor outcome in patients with acute myocardial infarction, but the consequences of right BBB are not well understood. OBJECTIVES:To 1) estimate the prevalence of left and right BBB in patients with myocardial infarction; 2) compare the clinical characteristics of and treatments received by patients with left, right, or no BBB; and 3) determine the independent association of left BBB and right BBB with in-hospital death. DESIGN:Retrospective cohort study. SETTING:Multicenter registry of 1571 U.S. hospitals. PATIENTS:297,832 patients with acute myocardial infarction who had left, right, or no BBB on initial electrocardiography. MEASUREMENTS:Presence and type of BBB, clinical characteristics of patients, therapies given, and in-hospital death. RESULTS:Patients with left BBB (n = 19,967; 6.7%) or right BBB (n = 18,354; 6.2%) were older and had more comorbid illness and congestive heart failure than patients with no BBB. Among patients for whom thrombolytic therapy was clearly indicated, fewer patients with left or right BBB (16.6% and 32.0%, respectively) than patients with no BBB (66.5%) received this therapy (P < 0.001). Fewer patients with left or right BBB (60.6% and 67.3%, respectively) than patients with no BBB (75.6%) received aspirin within the first 24 hours (P < 0.001), and fewer patients with left or right BBB (23.9% and 31.8%, respectively) than patients with no BBB (40.4%) received beta-blockers within the first 24 hours (P < 0.001). Unadjusted in-hospital mortality rates were almost twice as high for patients with left or right BBB (22.6% and 23.0%, respectively) as for patients with no BBB (13.1%) (P < 0.001). Compared with no BBB and no ST-segment elevation, left BBB was associated with a 34% increase (odds ratio, 1.34 [95% CI, 1.28 to 1.39]) and right BBB was associated with a 64% increase (odds ratio, 1.64 [CI, 1.57 to 1.71]) in the risk for in-hospital death, after adjustment for potential confounders. CONCLUSIONS:In patients with acute myocardial infarction, prevalences of right and left BBB are similar. Patients with BBB have more comorbid conditions, are less likely to receive therapy, and have an increased risk for in-hospital death compared with patients with no BBB. Compared with left BBB, right BBB seems to be a stronger independent predictor of in-hospital death.
journal_name
Ann Intern Medjournal_title
Annals of internal medicineauthors
Go AS,Barron HV,Rundle AC,Ornato JP,Avins ALdoi
10.7326/0003-4819-129-9-199811010-00003subject
Has Abstractpub_date
1998-11-01 00:00:00pages
690-7issue
9eissn
0003-4819issn
1539-3704journal_volume
129pub_type
杂志文章abstract:OBJECTIVE:To define the incidence of and possible risk factors for invasive Haemophilus influenzae disease in adults. DESIGN:Prospective, population-based surveillance of hospital and referral bacteriology laboratories. SETTING:Metropolitan Atlanta, Georgia community. PATIENTS:All patients with H. influenzae isolate...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-116-10-806
更新日期:1992-05-15 00:00:00
abstract::Computerized axial tomography permits accurate cross-sectional radiographic visualization of visceral organs. Thus, "radiographic area" of an organ slice can be calculated and converted to actual area from a standard grid printed on the roentgenogram. Because the width between slices is known, the volume of an organ s...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-90-2-185
更新日期:1979-02-01 00:00:00
abstract::This statement summarizes the U.S. Preventive Services Task Force (USPSTF) recommendations on screening for family and intimate partner violence, based on the USPSTF's examination of evidence specific to family and intimate partner violence, and updates the 1996 recommendations on this topic. In 1996, the USPSTF found...
journal_title:Annals of internal medicine
pub_type: 指南,杂志文章,实务指引
doi:10.7326/0003-4819-140-5-200403020-00014
更新日期:2004-03-02 00:00:00
abstract::Increasingly, interventions aimed at improving care are likely to use such technologies as machine learning and artificial intelligence. However, health care has been relatively late to adopt them. This article provides clinical examples in which machine learning and artificial intelligence are already in use in healt...
journal_title:Annals of internal medicine
pub_type: 杂志文章,评审
doi:10.7326/M19-0872
更新日期:2020-06-02 00:00:00
abstract:BACKGROUND:Recently, liver transplantation has been used to treat patients with familial amyloid polyneuropathy (FAP). OBJECTIVE:To describe the clinical course of patients with FAP who received partial-liver transplantation from living donors. DESIGN:Case series. SETTING:University hospital in Matsumoto, Japan. PA...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-131-8-199910190-00008
更新日期:1999-10-19 00:00:00
abstract::Sideroblastic anemia after treatment for Hogdkin's disease was seen in two patients 3 years after completion of radiation therapy and chemotherapy. This was followed in both by the development of myelomonoblastic leukemia. No evidence of recurrent Hodgkin's disease was present in either patient. Our observation sugges...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-92-5-625
更新日期:1980-05-01 00:00:00
abstract::Visual loss from the complications of advanced diabetic retinopathy now can be managed more effectively by surgical vitrectomy with a significant reduction in operative and postoperative ocular morbidity. Ocular structures are now maintained in a more normal physiologic state, leaving the patient's lens in place, help...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-99-4-562
更新日期:1983-10-01 00:00:00
abstract:BACKGROUND:Dietary and lifestyle modification efforts are the primary treatments for people who are obese or overweight. The effect of dietary counseling on long-term weight change is unclear. PURPOSE:To perform a meta-analysis of the effect of dietary counseling compared with usual care on body mass index (BMI) over ...
journal_title:Annals of internal medicine
pub_type: 杂志文章,meta分析,评审
doi:10.7326/0003-4819-147-1-200707030-00007
更新日期:2007-07-03 00:00:00
abstract::Patients with diabetes mellitus and coronary artery disease are thought to have painless myocardial ischemia more often than patients without diabetes. We studied 50 consecutive patients with diabetes and 50 consecutive patients without diabetes, all with ischemia, on exercise thallium scintigraphy to show the reliabi...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-108-2-170
更新日期:1988-02-01 00:00:00
abstract::We diagnosed Waldenström's macroglobulinemia in a father and three offspring. Clinical and subclinical autoimmune disorders occurred excessively in the family. The HLA haplotype A2, B8, DRw3 was detected in all patients with Waldenström's macroglobulinemia and all but one family member with autoimmune manifestations. ...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-93-6-830
更新日期:1980-12-01 00:00:00
abstract::The competition for funds to conduct clinical research is intense, and only a minority of grant proposals receive funding. In particular, funding for patient-oriented research lags behind that allocated for basic science research. Grant writing is a skill of fundamental importance to the clinical researcher, and condu...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-142-4-200502150-00009
更新日期:2005-02-15 00:00:00
abstract::Ten patients with lupus nephritis and marked proteinuria (3.9 g or more/d) that did not respond adequately to treatment with prednisone alone or prednisone in combination with azathioprine were treated with total lymphoid irradiation in an uncontrolled feasibility study. Within 6 weeks after the start of total lymphoi...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-102-4-450
更新日期:1985-04-01 00:00:00
abstract::Determining the patient's major reasons for seeking care is of critical importance in a successful medical encounter. To study the physician's role in soliciting and developing the patient's concerns at the outset of a clinical encounter, 74 office visits were recorded. In only 17 (23%) of the visits was the patient p...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-101-5-692
更新日期:1984-11-01 00:00:00
abstract:BACKGROUND:Persons with abdominal aortic aneurysm are more likely to have a higher prevalence of risk factors for and clinical manifestations of cardiovascular disease. It is unknown whether these factors explain the high mortality rate associated with abdominal aortic aneurysm. OBJECTIVE:To describe the risk for mort...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-134-3-200102060-00008
更新日期:2001-02-06 00:00:00
abstract:BACKGROUND:Exercise therapy encompasses a heterogeneous group of interventions. There continues to be uncertainty about the most effective exercise approach in chronic low back pain. PURPOSE:To identify particular exercise intervention characteristics that decrease pain and improve function in adults with nonspecific ...
journal_title:Annals of internal medicine
pub_type: 杂志文章,评审
doi:10.7326/0003-4819-142-9-200505030-00014
更新日期:2005-05-03 00:00:00
abstract:OBJECTIVE:To determine whether self-assessment of purified protein derivative of tuberculin (PPD) skin test reactions, done using a simple two-choice approach, is an effective screening method for tuberculosis. DESIGN:Double-blind comparison between self-assessments and trained professional readings of PPD skin test r...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-125-4-199608150-00004
更新日期:1996-08-15 00:00:00
abstract:STUDY OBJECTIVE:To determine the relative importance of adiposity and fat distribution to cardiovascular risk profile. DESIGN:A cross-sectional study. SETTING:Clinical research center funded by the National Institutes of Health. PATIENTS:Convenience sample of 33 healthy premenopausal women with a wide range of body ...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-110-11-867
更新日期:1989-06-01 00:00:00
abstract::Thirty-nine cases of Legionnaires' disease in a 16-month period were identified in visitors to and residents of Bloomington, Indiana. Thirty-five patients had spent at least one night at the Indiana Memorial Union in the 2 weeks before becoming ill. Five of 32 sporadic cases nationwide between 1 January and 31 March 1...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-90-4-587
更新日期:1979-04-01 00:00:00
abstract:BACKGROUND:Without population-based evidence, some clinicians recommend short-term suspension of hormone therapy to improve the performance of mammography. Hormone therapy increases breast density, and abnormal screening mammograms are more common among women with denser breasts and among women using hormone therapy. ...
journal_title:Annals of internal medicine
pub_type: 杂志文章,随机对照试验
doi:10.7326/0003-4819-150-11-200906020-00003
更新日期:2009-06-02 00:00:00
abstract::This guideline summarizes the current approaches for the diagnosis of venous thromboembolism. The importance of early diagnosis to prevent mortality and morbidity associated with venous thromboembolism cannot be overstressed. This field is highly dynamic, however, and new evidence is emerging periodically that may cha...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-146-6-200703200-00013
更新日期:2007-03-20 00:00:00
abstract:OBJECTIVE:To study the relation between housestaff coverage schedules and the occurrence of preventable adverse events. DESIGN:Case-control study. SETTING:Urban teaching hospital. PATIENTS:All 3146 patients admitted to the medical service during a 4-month period. MEASUREMENTS:A previously tested confidential self-r...
journal_title:Annals of internal medicine
pub_type: 临床试验,杂志文章
doi:10.7326/0003-4819-121-11-199412010-00008
更新日期:1994-12-01 00:00:00
abstract:OBJECTIVE:To describe the effects of human immunodeficiency virus (HIV) infection on the serologic manifestations and response to treatment of syphilis in intravenous drug users. DESIGN:Cohort study of intravenous drug users. SETTING:Medical clinic in a hospital-based methadone maintenance treatment program in New Yo...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-118-5-199303010-00005
更新日期:1993-03-01 00:00:00
abstract:BACKGROUND:The optimum duration of anticoagulant therapy after an episode of deep venous thrombosis (DVT) is controversial. Contributing to the controversy is uncertainty about whether residual venous thrombosis, as assessed by repeated ultrasonography over time, increases the risk for recurrent thromboembolism. OBJEC...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-137-12-200212170-00008
更新日期:2002-12-17 00:00:00
abstract:OBJECTIVE:To determine whether a cytogenetic response after interferon-alpha therapy in patients with chronic myelogenous leukemia is independently associated with improved survival. DESIGN:Retrospective analysis. PATIENTS:274 patients with a diagnosis of Philadelphia chromosome-positive chronic myelogenous leukemia ...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-122-4-199502150-00003
更新日期:1995-02-15 00:00:00
abstract:BACKGROUND:Recent evidence shows that arthroscopic partial meniscectomy (APM) offers no benefit over conservative treatment of patients with a degenerative meniscus tear. However, patients who report mechanical symptoms (sensations of knee catching or locking) may benefit from APM. OBJECTIVE:To assess whether APM impr...
journal_title:Annals of internal medicine
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.7326/M15-0899
更新日期:2016-04-05 00:00:00
abstract::Antimicrobial prophylaxis prevents recurrent urinary tract infections in susceptible women, but its cost effectiveness has not been studied. In a recent placebo-controlled trial of urinary prophylaxis, we also assessed cost effectiveness using a decision analysis model. In our hospital the direct cost of 1 patient yea...
journal_title:Annals of internal medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.7326/0003-4819-94-2-251
更新日期:1981-02-01 00:00:00
abstract::Very low calorie diets used to treat moderate and severe obesity produce average weight losses of 20 kg in 12 weeks. This paper reviews the development of very low calorie diets from research on fasting in the late 1950s and examines data on the amount of dietary protein needed to achieve positive nitrogen balance. Th...
journal_title:Annals of internal medicine
pub_type: 杂志文章,评审
doi:10.7326/0003-4819-99-5-675
更新日期:1983-11-01 00:00:00
abstract::Aspects of phosphate biochemistry pertinent to therapy, the distribution of phosphorus in body compartments, therapeutic phosphorus preparations, prevention of hypophosphatemia, therapeutic guidelines, and side-effects of phosphorus therapy are reviewed. Severe hypophosphatemia (less than 0.32 mmol/litre or less than ...
journal_title:Annals of internal medicine
pub_type: 杂志文章
doi:10.7326/0003-4819-89-6-941
更新日期:1978-12-01 00:00:00
abstract:BACKGROUND:Although clinicians avoid giving meropenem to patients with penicillin allergy because of potential cross-reactivity, the rate of cross-reactivity between penicillins and meropenem has not been prospectively determined. OBJECTIVE:To assess the tolerability of meropenem in patients with documented penicillin...
journal_title:Annals of internal medicine
pub_type: 临床试验,杂志文章,多中心研究
doi:10.7326/0003-4819-146-4-200702200-00005
更新日期:2007-02-20 00:00:00
abstract:OBJECTIVE:To determine the efficacy and safety of fluconazole treatment of coccidioidal meningitis. DESIGN:Uncontrolled clinical trial. SETTING:Four university-based treatment centers in California, Arizona, and Texas. Most therapy was conducted without hospitalization. PATIENTS:Fifty consecutive patients with activ...
journal_title:Annals of internal medicine
pub_type: 杂志文章,多中心研究
doi:10.7326/0003-4819-119-1-199307010-00005
更新日期:1993-07-01 00:00:00