Abstract:
BACKGROUND:The most widely used experimental models of infective endocarditis (IE) are the rabbit and rat models, in which cardiac valve lesions are induced by a polyethylene catheter introduced into the left ventricle through the aortic valve. Our study was designed to create a rabbit model of IE right-sided with echocardiographic guidance. METHODS:Thirty rabbits underwent both catheterization and inoculation (group A). These were divided into three subgroups of ten based on the time of catheter removal (immediately, after 24 h, and after death or moribundity for groups, A(1), A(2), and A(3), respectively). Ten inoculated-only and ten catheterized-only rabbits served as controls. A catheter system consisted of a polyethylene catheter and a guide wire inside it. This system was passed through the rabbits' tricuspid valves under echocardiographic guidance to damage them. The ratio of left ventricle to right ventricle (LV/RV) was measured in a four-chamber view before catheterization and at the time of death or moribundity. The peak velocity of tricuspid regurgitation (V(TR)) was measured in a four-chamber view at the time of catheterization and at the time of death or moribundity. Staphylococcus aureus (ATCC 29213) inoculation was performed 24 h after right heart catheterization to produce IE. RESULTS:IE was confirmed in 28 of 30 rabbits by macroscopic and histologic examination of tricuspid valves, blood cultures, and bacterial count in cardiac vegetations. Cardiac vegetations were confirmed in 25 of 28 IE rabbits by echocardiography. Enlargement of right ventricle dimension with a significantly decreased LV/RV ratio was confirmed in all IE rabbits at the time of death or moribundity than at the initial state (1.11 ± 0.35 vs. 1.95 ± 0.39, P < 0.01; 1.21 ± 0.34 vs. 1.98 ± 0.35, P < 0.01; 1.04 ± 0.31 vs. 2.00 ± 0.41, P < 0.01 for groups A(1), A(2), and A(3), respectively). V(TR) was significantly higher in all the IE rabbits at the time of death or moribundity than at the time of catheterization (1.89 ± 0.46 vs 0.76 ± 0.45, P < 0.01; 2.04 ± 0.73 vs 0.68 ± 0.66, P < 0.01; 2.24 ± 0.51 vs 0.87 ± 0.55, P < 0.01 for group A(1), A(2), and A(3), respectively). CONCLUSION:The models described herein closely reproduced the pathogenesis and pathophysiology of right heart catheter-induced endocarditis in humans. Echocardiographic guidance is helpful in the process of right heart catheterization. Some echocardiographic parameters, such as V(TR) and the LV/RV ratio could be used to assess the success or failure of the IE models.
journal_name
Cardiovasc Ultrasoundjournal_title
Cardiovascular ultrasoundauthors
Wang ML,Zhang Y,Fan M,Guo YJ,Ren WD,Luo EJdoi
10.1186/1476-7120-11-3subject
Has Abstractpub_date
2013-01-14 00:00:00pages
3issn
1476-7120pii
1476-7120-11-3journal_volume
11pub_type
杂志文章abstract:OBJECTIVES:To describe the findings and evaluate appropriateness of a carotid artery study including the measurement of IMT, the presence of atherosclerotic plaque, and their correlation with cardiovascular risk factors. METHODS:555 patients (220 men; 67.06 +/- 12.44 years) were included in the study. 120 patients (21...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/1476-7120-6-52
更新日期:2008-10-16 00:00:00
abstract:BACKGROUND:Left ventricular (LV) ejection fraction (LVEF) assessed by two-dimensional echocardiography (2DE) is the most widely used parameter for clinical decision-making, but reproducibility and accuracy problems remain. We evaluated the usefulness of a novel training program based on cardiac magnetic resonance (CMR)...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/s12947-019-0173-z
更新日期:2019-10-31 00:00:00
abstract:INTRODUCTION:Serial monitoring of patients participating in clinical trials of carotid artery therapy requires noninvasive precision methods that are inexpensive, safe and widely available. Noninvasive ultrasonic duplex Doppler velocimetry provides a precision method that can be used for recruitment qualification, pre-...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/1476-7120-8-39
更新日期:2010-09-07 00:00:00
abstract:BACKGROUND:Use of preoperative echocardiography may help to identify patients with increased cardiac risk, who may benefit from modification of perioperative plan. The objective of our study was to evaluate the reliability of preoperative focused cardiac ultrasound (FoCUS) performed by an anaesthetist with basic ultras...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/s12947-015-0039-y
更新日期:2015-11-20 00:00:00
abstract:BACKGROUND:Though hemodialysis (HD) acutely improves cardiac function, the impact of background diseases like coronary artery disease (CAD) and Type 2 diabetes (DM) in the setting of end-stage renal disease (ESRD) is not known. Tissue velocity echocardiography (TVE) offers a fast choice to follow changes in myocardial ...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/1476-7120-4-9
更新日期:2006-02-02 00:00:00
abstract:BACKGROUND:Myocardial contractility can be investigated using longitudinal peak strain. It can be calculated using the Doppler-derived TDI method and the non-Doppler method based on tissue tracking on B-mode images. Both are validated and show good reproducibility, but no comparative analysis of their results has yet b...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/1476-7120-5-7
更新日期:2007-02-07 00:00:00
abstract::Miniaturization has evolved in the creation of a pocket-size imaging device which can be utilized as an ultrasound stethoscope. This study assessed the additional diagnostic power of pocket size device by both experts operators and trainees in comparison with physical examination and its appropriateness of use in comp...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/1476-7120-8-51
更新日期:2010-11-26 00:00:00
abstract::Originally described by Brock and Teare, today hypertrophic cardiomyopathy is clinically defined as left (or right) ventricular hypertrophy without a known cardiac or systemic cause, such as systemic hypertension, Fabry's disease or aortic stenosis.Also appreciated today is the enormous genotypic and phenotypic hetero...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/1476-7120-7-31
更新日期:2009-07-03 00:00:00
abstract:PURPOSE:Left ventricular (LV) wall thickness can be measured at the posterior wall (PW) and the intraventricular septum (IVS) in a parasternal long axis view by transthoracic echocardiography. Thus, there are three methods to calculate relative wall thickness as follows: RWTPW = 2 × PWth/LVDd; RWTIVS + PW = (IVSth + PW...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/s12947-019-0179-6
更新日期:2019-12-03 00:00:00
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journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/1476-7120-8-35
更新日期:2010-09-01 00:00:00
abstract:BACKGROUND:The goal of this study was to determine if left ventricular (LV) global longitudinal strain (GLS) predicts heart failure (HF) readmission in patients with acute decompensated heart failure. METHODS AND RESULTS:Two hundred ninety one patients were enrolled at the time of admission for acute decompensated hea...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/s12947-017-0098-3
更新日期:2017-03-15 00:00:00
abstract::This review article is aimed at comparing the results of histopathological and clinical imaging studies to assess coronary collateral circulation in humans. The role of collaterals, as emerging from morphological studies in both normal and atherosclerotic coronary vessels, is described; in addition, present role and f...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章,评审
doi:10.1186/1476-7120-3-6
更新日期:2005-03-01 00:00:00
abstract:BACKGROUND:To explore the association between the ratio of tricuspid annular plane systolic excursion (TAPSE) and pulmonary arterial systolic pressure (PASP), and long- and short-term outcomes in mechanically ventilated septic shock patients. METHODS:Septic shock patients admitted to the intensive care unit (ICU) were...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/s12947-020-00198-y
更新日期:2020-06-12 00:00:00
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journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/s12947-019-0165-z
更新日期:2019-08-10 00:00:00
abstract:BACKGROUND:Calcification is an independent predictor of mortality in calcific aortic valve disease (CAVD). The aim of this study was to evaluate the use of non-invasive, non-ionizing echocardiographic calibrated integrated backscatter (cIB) for monitoring progression and subsequent regression of aortic valvular calcifi...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/1476-7120-11-4
更新日期:2013-01-26 00:00:00
abstract:BACKGROUND:The aim of this study was to define the independent determinants of left atrial appendage (LAA) thrombus among various echocardiographic parameters measured by Velocity Vector Imaging (VVI) in patients with nonvalvular atrial fibrillation (AF) receiving warfarin, particularly in patients with a low CHADS2 sc...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/1476-7120-10-50
更新日期:2012-12-27 00:00:00
abstract::To make assessment of paravalvular aortic leakage (PVL) after transcatheter aortic valve implantation (TAVI) more uniform the second Valve Academic Research Consortium (VARC) recently updated the echocardiographic criteria for mild, moderate and severe PVL. In the VARC recommendation the assessment of the circumferent...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章,评审
doi:10.1186/s12947-016-0080-5
更新日期:2016-09-06 00:00:00
abstract:BACKGROUND:Primary intracardiac tumours are rare, there are however several entities that can mimic tumours. Contrast echocardiography has been suggested to aid the differentiation of various suspected masses. We present a case where transthoracic echocardiography completely misdiagnosed a left atrial mass, partly due ...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/1476-7120-7-4
更新日期:2009-01-29 00:00:00
abstract:BACKGROUND:A history of previous cardiac disease increases the maternal mortality risk by as much as 100%. There is no consensus on the absolute contraindications to vaginal delivery in valvular heart disease, but central regional anesthesia is traditionally considered contraindicated in patients with severe aortic ste...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/s12947-020-00226-x
更新日期:2020-11-02 00:00:00
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journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/s12947-015-0013-8
更新日期:2015-04-21 00:00:00
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journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/1476-7120-12-2
更新日期:2014-01-28 00:00:00
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journal_title:Cardiovascular ultrasound
pub_type: 杂志文章,随机对照试验
doi:10.1186/1476-7120-10-35
更新日期:2012-08-17 00:00:00
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journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/1476-7120-7-44
更新日期:2009-09-04 00:00:00
abstract:BACKGROUND:Blood flow between the right and left ventricles is subject to the continuity equation and systolic ventricular interdependence. Quantification of this relationship might aid in understanding inter-ventricular function. The purpose of this study was to evaluate and quantify ventricular interdependence by dir...
journal_title:Cardiovascular ultrasound
pub_type: 临床试验,杂志文章
doi:10.1186/1476-7120-9-42
更新日期:2011-12-20 00:00:00
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journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/1476-7120-3-19
更新日期:2005-08-11 00:00:00
abstract::The growing need for coronary evaluation has raised interest in non-radioactive, non-invasive monitoring systems. In particular, radiation exposure during coronary investigations has been shown to be a possible cause of an enhanced risk of secondary tumors. Literature search has indicated that transthoracic echocardio...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章,评审
doi:10.1186/s12947-016-0048-5
更新日期:2016-01-19 00:00:00
abstract::Echocardiography has the ability to noninvasively explore hemodynamic variables during pharmacologic or exercise stress test in patients with heart failure. In this review, we detail some important potential applications of stress echocardiography in patients with heart failure. In patients with coronary artery diseas...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章,评审
doi:10.1186/1476-7120-2-11
更新日期:2004-07-30 00:00:00
abstract:BACKGROUND:A hybrid approach to minimally invasive perventricular closure of VSD in infants is safe and effective, and has been performed under guidance of transesophageal echocardiography (TEE). We applied transthoracic echocardiographic (TTE) guidance to this hybrid approach, and compare results guided by TTE with th...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/1476-7120-11-8
更新日期:2013-03-11 00:00:00
abstract::Real-time three-dimensional (RT-3D) echocardiography has entered the clinical practice but true incremental value over standard two-dimensional echocardiography (2D) remains uncertain when applied to stress echo. The aim of the present study is to establish the additional value of RT-3D stress echo over standard 2D st...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/1476-7120-6-31
更新日期:2008-06-20 00:00:00
abstract:BACKGROUND:The developments in echocardiography or ultrasound cardiography (UCG) have improved our clinical capabilities. However, advanced hardware and software capabilities have resulted in UCG facilities of dubious clinical benefits. Is tissue Doppler echocardiography (TDE) is one such example? PRESENTATION OF THE ...
journal_title:Cardiovascular ultrasound
pub_type: 杂志文章
doi:10.1186/1476-7120-2-12
更新日期:2004-08-12 00:00:00