1,721,016 research outputs found
High quality heart and lung auscultation using a web-based mobile home-telecare equipment for heart failure monitoring.
No full textDoppler echocardiographic evaluation of the effect of atrial pacing-induced ischemia on left ventricular filling in patients with coronary artery disease.
No full textTransesophageal Doppler echocardiography evaluation of coronary blood flow velocity in baseline conditions and during dipyridamole-induced coronary vasodilation.
No full textLa tele-ecocardiografia via internet è utile per il teleconsulto in UTIC: valutazione di fattibilità in un contesto clinico routinario
No full textPrognostic value of left ventricular morphology and contractile reserve as assessed by low-dose dobutamine echocardiography in cardiac resynchronization therapy
No full textClinical use of stress echocardiography: factors affecting diagnostic accuracy
No full textStress echocardiography is frequently used for the diagnosis of coronary artery disease. Its diagnostic accuracy is strongly influenced by many variables including patient selection, type of stress procedure utilized, stress protocol, echocardiographic imaging modality, digital reviewing technology and expertise in performing and interpreting the examinations. All these must be taken into consideration when evaluating and comparing different studies presented in the literature, as well as in optimal organization (accurate selection of the appropriate stress modality and protocol execution, optimal use of technology, appropriate training of medical and non-medical personnel) of the laboratory involved in stress echocardiograph
Left ventricle outflow tract vegetation, embolism and troponin rise: An infective endocarditis case report
No full textMyocardial contrast echocardiography in acute myocardial infarction. Pathophysiological background and clinical applications
No full textMyocardial contrast echocardiography is a technique used in experimental and clinical settings in order to visualize the pattern of intramyocardial perfusion. In the acute phase of myocardial infarction, regional absence of flow during myocardial contrast echocardiography delineates the area at risk of necrosis, while the definitive non-perfused area expresses infarct size. Reopening the infarct-related artery, which may be achieved spontaneously by thrombolysis or percutaneous transluminal coronary angioplasty, is not a reliable indicator of intramyocardial reperfusion. If myocardial ischaemia due to coronary occlusion has been sufficiently prolonged and severe, not only myocyte viability, but also microvascular integrity is lost. Myocardial contrast echocardiography, using intracoronary injection of sonicated contrast medium, gives information about microvascular integrity and the effective presence of intramyocardial reflow. Anatomical integrity of microvasculature does not necessarily imply preserved function, and thus the microvessel vasodilating reserve may also be impaired. Myocardial contrast echocardiography has the potential to assess alterations in microvascular function, showing, in the myocardial area with reduced coronary reserve, a relatively reduced increase in echocontrast signal intensity when an intravenous vasodilator agent is administered
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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