当前位置： SCI文献检索 > MAYO CLINIC PROCEEDINGS期刊下所有文献 > Image enhancement by noncontrast harmonic echocardiography. Part II. Quantitative assessment with use of contrast-to-speckle ratio.

Image enhancement by noncontrast harmonic echocardiography. Part II. Quantitative assessment with use of contrast-to-speckle ratio.

Abstract：

OBJECTIVE:To ascertain whether "harmonic imaging"--use of ultrasound signals with the frequency twice that of the transmitted signal for ultrasound image generation--can improve image contrast while reducing noise. METHODS:Technically difficult echocardiograms (nonvisualization of 2 or more endocardial segments in a 16-segment model) from 25 patients were analyzed. Corresponding fundamental and harmonic images of the left ventricle in the apical four-chamber, two-chamber, and long-axis views were divided into basal, mid, and apical regions. The difference in image quality between fundamental and harmonic scans was assessed by using the muscle-to-cavity contrast-to-speckle ratio (CSRmc). RESULTS:The mean CSRmc values of pooled data revealed significant image enhancement by harmonic scanning (CSRmc increased from 0.84 to 1.06; P < 0.0001). Regression analysis showed that harmonic imaging improved the CSRmc values in 68% of all scans. Regional analysis indicated the most enhancement in basal regions (CSRmc increased from 0.96 to 1.34; P < 0.0001), followed by the mid (CSRmc increased from 0.84 to 1.04; P < 0.0001) and apical (CSRmc increased from 0.68 to 0.74; P = 0.0138) left ventricular regions. CONCLUSION:Noncontrast harmonic imaging significantly enhances suboptimal echocardiographic images, particularly in the regions distant from the transducer.

journal_name

Mayo Clin Proc

journal_title

Mayo Clinic proceedings

authors

Belohlavek M,Tanabe K,Mulvagh SL,Foley DA,Greenleaf JF,Seward JB

doi

10.4065/73.11.1066

subject

Has Abstract

pub_date

1998-11-01 00:00:00

pages

1066-70

issue

11

eissn

0025-6196

issn

1942-5546

pii

S0025-6196(11)63814-7

journal_volume

73

pub_type

杂志文章

相关文献

MAYO CLINIC PROCEEDINGS文献大全
  • Impact of the SARS-CoV-2 Pandemic on Emergency Department Presentations in an Integrated Health System.

    abstract：OBJECTIVE:To quantify the impact of the severe acute respiratory syndrome coronavirus 2 pandemic on emergency department volumes and patient presentations and evaluate changes in community mortality for the purpose of characterizing new patterns of emergency care use. PATIENTS AND METHODS:This is an observational cros...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.1016/j.mayocp.2020.09.019

    authors： Walker LE,Heaton HA,Monroe RJ,Reichard RR,Kendall M,Mullan AF,Goyal DG

    更新日期：2020-11-01 00:00:00

  • Resource utilization and outcome in gravely ill intensive care unit patients with predicted in-hospital mortality rates of 95% or higher by APACHE III scores: the relationship with physician and family expectations.

    abstract：OBJECTIVE:To assess resource utilization and outcome in gravely ill patients admitted to an intensive care unit (ICU) and the potential association with health care workers' and family members' expectations. PATIENTS AND METHODS:We retrospectively evaluated ICU patients with a predicted in-hospital mortality rate of 9...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.4065/80.2.166

    authors： Berge KH,Maiers DR,Schreiner DP,Jewell SM,Bechtle PS,Schroeder DR,Stevens SR,Lanier WL

    更新日期：2005-02-01 00:00:00

  • Epinephrine-induced QT interval prolongation: a gene-specific paradoxical response in congenital long QT syndrome.

    abstract：OBJECTIVE:To determine the effect of epinephrine on the QT interval in patients with genotyped long QT syndrome (LQTS). PATIENTS AND METHODS:Between May 1999 and April 2001, 37 patients (24 females) with genotyped LQTS (19 LQT1, 15 LQT2, 3 LQT3, mean age, 27 years; range, 10-53 years) from 21 different kindreds and 27...

    journal_title：Mayo Clinic proceedings

    pub_type： 临床试验,杂志文章

    doi：10.4065/77.5.413

    authors： Ackerman MJ,Khositseth A,Tester DJ,Hejlik JB,Shen WK,Porter CB

    更新日期：2002-05-01 00:00:00

  • Evaluation of quaternary aminoethyl-Sephadex A50 column chromatography for detection of anti-cytomegalovirus immunoglobulin M.

    abstract：:The sensitivity of an indirect fluorescent antibody (IFA) test (screening test) for the detection of antibodies to cytomegalovirus (CMV) was examined by using 128 serum specimens and quaternary aminoethyl (QAE)-Sephadex A50 column chromatography to separate IgM from IgG class antibodies. Of these 128 rheumatoid factor...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.1016/s0025-6196(12)65437-8

    authors： Elder BL,Shelley CD,Smith TF

    更新日期：1987-05-01 00:00:00

  • Use of the Coronary Artery Calcium Score in Discussion of Initiation of Statin Therapy in Primary Prevention.

    abstract：:Clinical guidelines for instituting pharmacotherapy for the primary prevention of atherosclerotic cardiovascular disease (ASCVD), specifically lipid management and aspirin, have long been based on absolute risk. However, lipid management in the current era remains challenging to both patients and clinicians in the set...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.1016/j.mayocp.2017.10.001

    authors： Michos ED,Blaha MJ,Blumenthal RS

    更新日期：2017-12-01 00:00:00

  • When patients are harmed, but are not wronged: ethics, law, and history.

    abstract：:Iatrogenic injury-injury caused unintentionally by medical treatment-breaks the oldest and most famous rule of medical ethics: primum non nocere, or above all, do no harm. Medical malpractice law, however, focuses on whether an injury was caused by negligence, not on whether an injury was iatrogenic. Iatrogenic injury...

    journal_title：Mayo Clinic proceedings

    pub_type： 传,历史文章,杂志文章,评审

    doi：10.1016/j.mayocp.2014.05.004

    authors： Klaas PB,Berge KH,Klaas KM,Klaas JP,Larson AN

    更新日期：2014-09-01 00:00:00

  • Long-term versus short-term treatment with recombinant interferon alfa-2a in patients with chronic hepatitis B: a prospective, randomized treatment trial.

    abstract：:We conducted a prospective, randomized trial to study the efficacy and tolerance of long-term versus short-term treatment with recombinant interferon alfa-2a in patients with chronic hepatitis B. Ten patients were randomly assigned to a 6-month interferon regimen, and 10 patients were assigned to a 3-week interferon t...

    journal_title：Mayo Clinic proceedings

    pub_type： 临床试验,杂志文章,随机对照试验

    doi：10.1016/s0025-6196(12)62144-2

    authors： Rakela J,Wood JR,Czaja AJ,O'Brien PC,Taswell HF,Bowyer BA,Lange SM,Anderson ML,Parent K

    更新日期：1990-10-01 00:00:00

  • Prognostic value of cardiac troponin T after myocardial infarction: a contemporary community experience.

    abstract：OBJECTIVE:To evaluate the role of cardiac troponin T (cTnT) in predicting death, recurrent ischemic events, and heart failure among community-dwelling persons with first myocardial infarction (MI). PATIENTS AND METHODS:Consecutive Olmsted County, Minnesota, residents with an incident MI between November 6, 2002, and D...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.1016/j.mayocp.2011.11.013

    authors： Gerber Y,Jaffe AS,Weston SA,Jiang R,Roger VL

    更新日期：2012-03-01 00:00:00

  • The metabolic syndrome: concepts and controversy.

    abstract：:The metabolic syndrome is an insulin-resistant state characterized by a cluster of cardiovascular risk factors, including various combinations of abdominal obesity, glucose intolerance, hypertension, and atherogenic dyslipidemia (elevated triglyceride values, low high-density lipoprotein cholesterol levels, and small ...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章,评审

    doi：10.4065/81.12.1615

    authors： Johnson LW,Weinstock RS

    更新日期：2006-12-01 00:00:00

  • Clinical features and prognostic implications of severe corticosteroid-treated cryptogenic chronic active hepatitis.

    abstract：:To assess the nature and prognosis of severe chronic active hepatitis of unknown cause, we compared 26 patients who had been fully screened for etiologic factors with 112 patients who had autoimmune chronic active hepatitis after similar durations of corticosteroid therapy (17(+)/- 2 versus 23 (+)/- 2 months), and fol...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.1016/s0025-6196(12)62106-5

    authors： Czaja AJ,Hay JE,Rakela J

    更新日期：1990-01-01 00:00:00

  • Botulinum Toxin in Parkinson Disease Tremor: A Randomized, Double-Blind, Placebo-Controlled Study With a Customized Injection Approach.

    abstract：BACKGROUND:In essential tremor and Parkinson disease (PD) tremor, administration of onabotulinumtoxinA via a fixed injection approach improves the tremor, but many patients (30%-70%) develop moderate to severe hand weakness, limiting the use of onabotulinumtoxinA in clinical practice. OBJECTIVE:To evaluate the safety ...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章,随机对照试验

    doi：10.1016/j.mayocp.2017.06.010

    authors： Mittal SO,Machado D,Richardson D,Dubey D,Jabbari B

    更新日期：2017-09-01 00:00:00

  • Primary and revision total hip arthroplasty for patients 90 years of age and older.

    abstract：OBJECTIVE:To assess the reliability, durability, and safety of primary and revision total hip arthroplasty (THA) in patients 90 years of age and older. PATIENTS AND METHODS:Between 1970 and 1997, 66 THAs, 48 primary and 18 revision, were done for 65 patients aged 90 to 104 years (mean, 92 years). The Harris hip score ...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.4065/78.3.285

    authors： Pagnano MW,McLamb LA,Trousdale RT

    更新日期：2003-03-01 00:00:00

  • Digital embolization from plaque-related thrombus in the thoracic aorta: identification with transesophageal echocardiography and resolution with warfarin therapy.

    abstract：:A 71-year-old man had painful blue toes after an episode of protracted vomiting. Abdominal, cardiac, and transesophageal ultrasound studies were performed before angiography was considered. A large mobile mass in the proximal descending thoracic aorta, which suggested thrombus, was identified by transesophageal echoca...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.1016/s0025-6196(12)60048-2

    authors： Blackshear JL,Jahangir A,Oldenburg WA,Safford RE

    更新日期：1993-03-01 00:00:00

  • Systematic review of the effectiveness of hyperbaric oxygenation therapy in the management of chronic diabetic foot ulcers.

    abstract：OBJECTIVE:To assess the efficacy and safety of hyperbaric oxygenation (HBO) therapy as adjunctive treatment for diabetic foot ulcers with a systematic review and meta-analysis of the literature. METHODS:MEDLINE, EMBASE, and the Cochrane Library were searched to find relevant articles published up to April 20, 2012, wi...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章,评审

    doi：10.1016/j.mayocp.2012.10.021

    authors： Liu R,Li L,Yang M,Boden G,Yang G

    更新日期：2013-02-01 00:00:00

  • Clinical and radiographic features of dural arteriovenous fistula, a treatable cause of myelopathy.

    abstract：OBJECTIVE:To assess presentation, imaging, treatment, and outcome of patients with myelopathy due to a dural arteriovenous fistula (DAVF). PATIENTS AND METHODS:This retrospective review identified 94 patients with DAVF surgically treated at our institution between June 1985 and December 1999. The mean ages of the 75 m...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.4065/76.11.1120

    authors： Atkinson JL,Miller GM,Krauss WE,Marsh WR,Piepgras DG,Atkinson PP,Brown RD Jr,Lane JI

    更新日期：2001-11-01 00:00:00

  • Effect of aspirin and antiplatelet drugs on the outcome of the fecal immunochemical test.

    abstract：OBJECTIVE:To evaluate the effect of aspirin and nonaspirin antiplatelet agents (NAAAs) on the performance of the fecal immunochemical test (FIT). PARTICIPANTS AND METHODS:We performed a post hoc analysis of results from a clinical trial that involved 28,696 asymptomatic average-risk men and women aged 50 to 69 years i...

    journal_title：Mayo Clinic proceedings

    pub_type： 临床试验,杂志文章

    doi：10.1016/j.mayocp.2013.04.016

    authors： Bujanda L,Lanas Á,Quintero E,Castells A,Sarasqueta C,Cubiella J,Hernandez V,Morillas JD,Perez-Fernández T,Salas D,Andreu M,Carballo F,Bessa X,Cosme A,Jover R,COLONPREV Study Investigators.

    更新日期：2013-07-01 00:00:00

  • Artifactual hypercalcemia in multiple myeloma.

    abstract：:A calcium-binding IgG K monoclonal protein in a patient with multiple myeloma and asymptomatic hypercalcemia was recognized, isolated, and characterized. In addition to binding by the whole IgG molecules, calcium was bound by purified Fab fragments and recombined heavy and light chains. In a competitive binding study,...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：

    authors： Annesley TM,Burritt MF,Kyle RA

    更新日期：1982-09-01 00:00:00

  • A reappraisal of clinical, roentgenographic, and endoscopic features of the Zollinger-Ellison syndrome.

    abstract：:Recent experience with 40 patients with the Zollinger-Ellison syndrome at all Mayo Clinic suggests that traditional clinical criteria for diagnosis are often absent or invalid. Patients are younger have a shorter duration of symptoms, and often present without prior gastric surgery. Clinical, roentgenographic, and end...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：

    authors： Regan PT,Malagelada JR

    更新日期：1978-01-01 00:00:00

  • Herpes zoster reactivation of phantom limb pain.

    abstract：:A case is reported in which a herpes zoster infection caused recurrence of phantom limb pain in a man whose left arm had been amputated 7 years previously. It is, to our knowledge, the first such case reported, and it shows the importance of peripheral mechanisms in the generation of phantom limb pain. ...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：

    authors： Wilson PR,Person JR,Su DW,Wang JK

    更新日期：1978-05-01 00:00:00

  • Autonomic failure and proximal skeletal myopathy in a patient with primary Sjögren syndrome.

    abstract：:Autonomic failure and proximal skeletal myopathy are rare features of the Sjögren syndrome (SS). We describe a 51-year-old woman with primary SS who had development of esophageal dysmotility, urinary retention, severe orthostatism, and skeletal myopathy during a 3-month period after the diagnosis of SS. Her symptoms a...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.4065/74.7.695

    authors： Sorajja P,Poirier MK,Bundrick JB,Matteson EL

    更新日期：1999-07-01 00:00:00

  • Snow skiing for the physically disabled.

    abstract：:The sport of snow skiing by the physically disabled, which originated in Europe in 1935 and first received attention in the United States in the 1940s, is reviewed in terms of opportunities available, instructions, adaptive equipment necessary, and benefits provided. Persons with a wide variety of disabilities (such a...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.1016/s0025-6196(12)60488-1

    authors： Laskowski ER

    更新日期：1991-02-01 00:00:00

  • Effect of β-blockers and other antihypertensive drugs on the risk of melanoma recurrence and death.

    abstract：OBJECTIVE:To verify preliminary studies on patients with melanoma exposed to β-blockers that suggested a reduced risk of disease recurrence and death. PATIENTS AND METHODS:Data were obtained from all consecutive patients diagnosed as having melanoma between January 1, 1993, and December 31, 2009, at the Department of ...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.1016/j.mayocp.2013.09.001

    authors： De Giorgi V,Gandini S,Grazzini M,Benemei S,Marchionni N,Geppetti P

    更新日期：2013-11-01 00:00:00

  • Diffuse bronchiolar disease due to chronic occult aspiration.

    abstract：OBJECTIVE:To describe clinical, radiological, and histopathologic features of diffuse bronchiolar disease due to chronic occult aspiration. PATIENTS AND METHODS:We identified 4 patients encountered from July 2001 to January 2004 who had persistent respiratory symptoms and lung Infiltrates and who were eventually diagn...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.4065/81.2.172

    authors： Barnes TW,Vassallo R,Tazelaar HD,Hartman TE,Ryu JH

    更新日期：2006-02-01 00:00:00

  • Effects of cardiac rehabilitation and exercise training programs on coronary patients with high levels of hostility.

    abstract：OBJECTIVE:To determine the effects of cardiac rehabilitation interventions on patients with hostility, or unexpressed anger, a coronary heart disease risk factor that adversely affects morbidity and mortality after major coronary heart disease events. METHODS:Using validated questionnaires to evaluate behavioral chara...

    journal_title：Mayo Clinic proceedings

    pub_type： 临床试验,杂志文章

    doi：10.4065/74.10.959

    authors： Lavie CJ,Milani RV

    更新日期：1999-10-01 00:00:00

  • Comparison of cardiovascular event rates in patients without cardiovascular disease in whom atorvastatin or simvastatin was newly initiated.

    abstract：OBJECTIVE:To compare cardiovascular (CV) event rates and risk in patients without previous CV disease in whom atorvastatin or simvastatin was newly initiated in a managed care setting. PATIENTS AND METHODS:Patients aged 18 to 64 years in whom atorvastatin or simvastatin was newly initiated between January 1, 2003, and...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.1016/S0025-6196(11)60779-9

    authors： Jacobson TA,Wertz DA,Hoy T,Kuznik A,Grochulski D,Cziraky M

    更新日期：2008-12-01 00:00:00

  • Sequence of Splenectomy and Rituximab for the Treatment of Steroid-Refractory Immune Thrombocytopenia: Does It Matter?

    abstract：OBJECTIVE:To evaluate the impact of the sequence of treatment with rituximab and/or splenectomy on time to relapse for patients with steroid-refractory immune thrombocytopenia (ITP). PATIENTS AND METHODS:Patients 18 years or older with steroid-refractory immune thrombocytopenia who underwent treatment with splenectomy...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.1016/j.mayocp.2019.05.024

    authors： Hammond WA,Vishnu P,Rodriguez EM,Li Z,Dholaria B,Shreders AJ,Rivera CE

    更新日期：2019-11-01 00:00:00

  • Preoperative laboratory screening in healthy Mayo patients: cost-effective elimination of tests and unchanged outcomes.

    abstract：:We reviewed the results of preoperative screening laboratory tests in asymptomatic healthy patients who underwent elective surgical procedures at our institution in 1988. Substantially abnormal results were found in 160 of 3,782 patients. All such abnormalities involved five tests: aspartate aminotransferase, glucose,...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.1016/s0025-6196(12)60487-x

    authors： Narr BJ,Hansen TR,Warner MA

    更新日期：1991-02-01 00:00:00

  • Sweet's syndrome: systemic signs and symptoms and associated disorders.

    abstract：OBJECTIVE:To characterize the findings associated with acute febrile neutrophilic dermatosis (Sweet's syndrome [SS]) and the response of SS to treatment. DESIGN:We retrospectively reviewed 48 cases of SS encountered at the Mayo Clinic between 1980 and 1992. MATERIAL AND METHODS:Histopathologic specimens and medical r...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.4065/70.3.234

    authors： Fett DL,Gibson LE,Su WP

    更新日期：1995-03-01 00:00:00

  • Treatment options for breast cancer resistant to anthracycline and taxane.

    abstract：:Breast cancer is the most common noncutaneous malignancy among every major ethnic group of women in the United States. Anthracyclines and taxanes are the most active and widely used chemotherapeutic agents for breast cancer, but the increased use of these agents at an early stage of disease often renders tumors resist...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章,评审

    doi：10.1016/S0025-6196(11)60585-5

    authors： Moreno-Aspitia A,Perez EA

    更新日期：2009-06-01 00:00:00

  • Outcomes of primary and secondary treatment of pericardial effusion in patients with malignancy.

    abstract：OBJECTIVE:To evaluate the treatment strategies for primary and secondary management of malignancy-related pericardial effusions. PATIENTS AND METHODS:Retrospective review of Mayo Clinic Rochester charts and external records of patients with pericardial effusion associated with malignant disease who required treatment ...

    journal_title：Mayo Clinic proceedings

    pub_type： 杂志文章

    doi：10.4065/75.3.248

    authors： Tsang TS,Seward JB,Barnes ME,Bailey KR,Sinak LJ,Urban LH,Hayes SN

    更新日期：2000-03-01 00:00:00