Search Results
Results 701 - 750 of 2329
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Drighil Abdenasser - - 2008
AIMS: Mitral stenosis (MS) affects right ventricular (RV) function as a result of myocardial and haemodynamic factors. Although the long-term effects of mitral commissurotomy are well known, the aim of this study was to evaluate the immediate impact of percutaneous mitral commissurotomy (PTMC) on RV function in patients with MS. ...
Turkmen Kultigin - - 2008
Cardiovascular problems are a major cause of morbidity and mortality in patients with autosomal dominant polycystic kidney disease. Endothelial dysfunction, an early and reversible feature in the pathogenesis of atherosclerosis, is associated with increased vascular smooth muscle tone, arterial stiffening, and increased intima-media thickness. Coronary flow velocity reserve is a ...
Funk Georg-Christian - - 2008
BACKGROUND: Increased right ventricular afterload leads to left ventricular diastolic dysfunction due to ventricular interdependence. Increased right ventricular afterload is frequently present in patients with COPD. The purpose of this study was to determine whether left ventricular diastolic dysfunction could be detected in COPD patients with normal or elevated pulmonary ...
Yu Qing - - 2008
To establish a developmental profile of fetal mouse cardiovascular parameters, we analyzed a large body of ultrasound measurements obtained by in utero echocardiography of C57BL/6J fetal mice from embryonic day 12.5 to 19.5 (term). Measurements were obtained using two-dimensional (2D), spectral Doppler and M-mode imaging with standard clinical cardiac ultrasound ...
Zhang Haibin - - 2008
To investigate the characteristics of myocardial acceleration in normal left ventricular walls, velocity vector imaging was performed in 30 normal volunteers. Peak accelerations during early systole and early diastole and time to peak acceleration during early systole were calculated for each segment of the standard 16-segment model. A gradient of ...
Dankowski RafaƂ - - 2008
BACKGROUND: In patients with type 1 diabetes mellitus (DM) impairment of the coronary circulation has been observed. This phenomenon could be ascribed to the existence of a specific cardiomyopathy. Disturbances in other microcirculation beds--renal and ocular--are mirrored by microalbuminuria and retinopathy, respectively. The association between coronary microvascular dysfunction and the ...
Tartière Jean-Michel - - 2008
AIMS: Since colour tissue Doppler (CTD) has been shown to underestimate myocardial velocity, we sought to compare CTD with spectral tissue Doppler (STD) and establish agreement and corresponding thresholds for clinical applications. METHODS AND RESULTS: We included 52 consecutive patients with sinus rhythm referred for echocardiographic assessment. Analysis involved a ...
Lee S-W - - 2008
To investigate whether the ratio of mitral peak velocity of early filling (E) to early diastolic mitral annular velocity (E') (E/E' ratio) can detect left ventricular diastolic dysfunction more sensitively than the ratio of E to mitral peak velocity of late filling (A) (E/A ratio) in systemic lupus erythematosus (SLE). ...
Lindqvist Per - - 2008
Assessment of right heart function remains difficult despite rapid technological echocardiographic developments. This review addresses the anatomical and physiological basis for assessment of right ventricular function. It also addresses advantages and limitations of individual echocardiographic techniques currently used in clinical and academic practice. The review concludes that volume calculation and ...
Aparci Mustafa - - 2008
Myocardial diastolic dysfunction is the relaxation abnormality of ventricles that limits the diastolic filling and generally precedes diastolic heart failure. Diastolic dysfunction is a common finding in diabetes. Diabetic patients receive hyperbaric oxygen (HBO) therapy for non-healing lower extremity ulcers, and exposure to HBO therapy is known to influence cardiovascular ...
Zhang Haibin - - 2008
BACKGROUND: The early diastolic peak velocity of left ventricular (LV) wall segment has always been thought to appear in the rapid filling phase. However, we find a segmental early relaxation phenomenon (SERP), characterized by an early diastolic peak velocity lying in the isovolumic relaxation (IVR) period. The present study aimed ...
Duzenli Mehmet Akif - - 2008
OBJECTIVES: This study was planned in order to investigate the effect of left bundle branch block (LBBB) on myocardial velocities obtained by tissue Doppler echocardiography (TDE) and myocardial performance index (MPI). METHODS: Subjects with LBBB (n = 61) and age-matched healthy subjects (n = 60) were enrolled in the study. ...
De Castro Stefano - - 2008
While right ventricular (RV) function and size are important clinical markers in several cardiac conditions, the assessment of RV function by two-dimensional (2D) echocardiography remains challenging, due to the complexity of RV geometry. We therefore sought to compare an easily-measured parameter, peak systolic velocity of tricuspid annulus (TAPSV) obtained by ...
Russell Noirin E - - 2008
OBJECTIVE: The purpose of this study was to establish normal values for fetal heart function in the first trimester. METHODS: This was a prospective observational study with institutional ethics approval and written maternal consent. Thirty-two healthy pregnant women were recruited, and transabdominal fetal echocardiography was performed between 12 and 14 ...
Edwards N C - - 2008
OBJECTIVES: To examine arterial and left ventricular function and their interaction in patients with early-stage chronic kidney disease (CKD). DESIGN AND SETTING: Cross-sectional observational study in a university teaching hospital. PATIENTS: 117 patients with stage 2 (60-89 ml/min/1.73 m(2)) or stage 3 (30-59 ml/min/1.73 m(2)) non-diabetic CKD, without overt cardiovascular ...
Fazio Giovanni - - 2009
Noncompaction of the ventricular myocardium (LVNC) is a rare congenital cardiomyopathy resulting from an arrest in normal endomyocardial embryogenesis. In 2002 Jenni et al. [Jenni R, Wyss CA, Oechslin EN, Kaufmann PA. Isolated ventricular noncompaction is associated with coronary microcirculatory dysfunction. J Am Coll Cardiol 2002; 39:450-454.] reported a microvascular ...
Richardson-Lobbedez Marjorie - - 2008
AIMS: We sought to evaluate the prognostic value of bedside tissue Doppler derived diastolic function in patients presenting with acute coronary syndrome (ACS) on top of major clinical predictors of mortality and routine laboratory testings. METHODS AND RESULTS: Bedside Doppler echocardiography and laboratory tests were prospectively performed in 239 consecutive ...
Tang W H Wilson - - 2008
High-sensitivity C-reactive protein (hs-CRP) is a hepatocyte-derived inflammatory cytokine shown to be increased in the setting of acute heart failure (HF), particularly with increased intracardiac filling pressures. In the chronic HF setting, the relation between hs-CRP and echocardiographic indexes of left ventricular (LV) diastolic performance has not been examined. We ...
Yates Andrew R - - 2008
OBJECTIVE: To determine whether tissue Doppler measurements provide sensitive measures of right ventricular function that correlate with the severity of bronchopulmonary dysplasia (BPD). STUDY DESIGN: 21 subjects (6 control subjects with no/mild BPD, 7 patients with moderate BPD, and 8 patients with severe BPD) underwent limited echocardiograms with standard M-mode, ...
Parcharidou Despina G - - 2008
BACKGROUND: Differentiation between ischemic (ICM) and dilated cardiomyopathy (DCM) has important therapeutic implications because the former may benefit from coronary revascularization. The aim of this study was to investigate right ventricular (RV) function using tissue Doppler echocardiography (TDE) and compare the TDE parameters of the RV among patients with ICM ...
Bellavia Diego - - 2008
We examined the potential role of Doppler myocardial imaging for early detection of systolic dysfunction in patients with systemic amyloidosis (AL) but without evidence of cardiac involvement by standard echocardiography. We identified 42 patients without 2-dimensional echocardiographic or Doppler evidence of cardiac involvement. These patients had normal ventricular wall thickness ...
Niizuma Shinnichiro - - 2008
BACKGROUND: Coronary flow reserve (CFR) reflects the functional capacity of microcirculation to adapt to blood demand during increased cardiac work. METHODS: Forty-one patients who had already undergone coronary angiography were studied. They consisted of 21 haemodialysis patients with no significant left anterior descending coronary artery (LAD) stenosis and 20 non-renal ...
Vitale Giovanni - - 2008
BACKGROUND: The intensive physical activity is often associated with cardiac changes. OBJECTIVES: (i) To evaluate the IGF-I system and myocardial structure and function by standard Doppler echocardiography and Tissue Doppler in athletes and sedentary controls; and (ii) to determine any relationship between IGF-I system and echocardiographic parameters. METHODS: Nineteen male ...
Fariba Rashidi Ghader
CHD including LV volume overload may cause alteration in cardiac functions. Echocardiography could detect systolic and diastolic dysfunction using several echo indices. We performed a comparison between 2 different methods (standard and MPI) in echocardiography to detect cardiac dysfunction in abovementioned diseases. This study was of descriptive and analytic type. ...
Poelaert J - - 2008
Echocardiography and Doppler provide intraoperative and immediate insight when a haemodynamic deterioration occurs. Both morphological and haemodynamic features can be diagnosed instantly. Furthermore, this tool is used as a functional haemodynamic monitoring device offering on line information on systolic function, preload and afterload. No clear data exist on improvement of ...
Xu Tingyan - - 2008
OBJECTIVE: Postresuscitation myocardial dysfunction is one of the leading causes of early death after successful resuscitation from sudden death. However, the diastolic characteristics of postresuscitation myocardial dysfunction are not well defined. We therefore investigated the postresuscitation left ventricular diastolic function following prolonged cardiac arrest and subsequent cardiopulmonary resuscitation. DESIGN: Prospective, ...
Huntbatch Andrew - - 2008
Detailed assessment of myocardial motion provides a key indicator of ventricular function, enabling the early detection and assessment of a range of cardiac abnormalities. Existing techniques for myocardial contractility analysis are complicated by a combination of factors including resolution, acquisition time, and consistency of quantification results. Phase-contrast velocity MRI is ...
Acharya P - - 2008
OBJECTIVE: To assess the influence of preload reduction by haemodialysis on Doppler echocardiographic indices of cardiac diastolic function. METHODOLOGY: Parameters of left ventricular diastolic function were measured in patients with end-stage renal disease before and after a single session of haemodialysis. Patients with valvular heart disease, coronary artery disease, cardiomyopathies, ...
Randrianarisolo S S LISSI, University of Paris, Créteil, France. - - 2008
This paper presents a method for the assessment of left ventricular myocardial deformations from untagged cardiac cine MRI. Firstly, a level set segmentation process is applied on the dataset to detect both endocardial and epicardial boundaries. Then the successive contours are matched using an original procedure that consists in an ...
Paraskevaidis Ioannis A - - 2007
The long-term prognostic significance of left ventricular (LV) long-axis contraction was investigated prospectively in 65 consecutive patients aged 58+/-15 years with asymptomatic aortic regurgitation, normal LV ejection fraction at rest, and no coronary artery or aortic root disease. A complete transthoracic echocardiographic study was performed at baseline and 12 months ...
Di Bello Vitantonio - - 2007
Doppler echocardiography is a fundamental instrument to understand heart damage during essential arterial hypertension. Left ventricular (LV) hypertrophy may also be conveniently studied in its morphological and functional aspects by ultrasound application. Echocardiography can also provide important morphological and functional information in hypertensive patients for therapeutic management and prognostic stratification. ...
Ikonomidis Ignatios - - 2007
Levosimendan has inotropic and vasodilatory effects. We investigated the effects of levosimendan on coronary flow and associated changes in neurohormonal activation and cardiac performance in patients with advanced heart failure. Forty-two patients with NYHA III-IV and a left ventricular ejection fraction (EF) 25+/-6%, were randomised to levosimendan 0.1 microg/kg/min (n=21) ...
Acharya Ganesh - - 2008
We hypothesized that acute fetal metabolic acidosis decreases fetal myocardial motion in a chronic sheep model of increased placental vascular resistance (R(ua)). Eleven ewes and fetuses were instrumented at 118-122 days of gestation. After 5 days of recovery and 24 h of placental embolization to increase R(ua), longitudinal myocardial velocities ...
Bozbas Huseyin - - 2008
BACKGROUND: Mitral annular calcification (MAC) has been shown to be associated with atherosclerosis, and is a predictor of cardiovascular events. Coronary flow reserve (CFR) determined by transthoracic echocardiography has been introduced as a reliable indicator for coronary microvascular function. In this study we sought to investigate CFR in patients with ...
Tousignant Claude P - - 2008
OBJECTIVE: This study was designed to compare the right ventricular (RV) Doppler tissue imaging parameters of tricuspid annular isovolumic acceleration (IVA), systolic velocity (S), and basilar myocardial strain and strain rate (SR) by using both transesophageal echocardiography (TEE) (inferior wall) and transthoracic echocardiography (TTE) (free wall) in a cardiac surgical ...
Marciniak M - - 2008
BACKGROUND: In normal subjects, systolic longitudinal regional velocity profiles (SVP) (measured both based on pulsed or tissue Doppler) have a non-uniform pattern. SVP from the right ventricle (RV), the septal (Sep) and the inferior wall are similar in shape and tend to be monophasic. Their shape differs markedly from the ...
Mankad Sunil - - 2007
The emerging role novel echocardiographic techniques play in the practice of cardiology and how they can specifically impact care of the elderly patient are reviewed. Newer echocardiographic modalities including Doppler tissue and strain/strain rate imaging, contrast echocardiography, 3-dimensional echocardiography, and velocity vector imaging are described. Examples illustrating how these newer ...
Zhang Haibin - - 2008
BACKGROUND: The early diastolic peak velocity of left ventricular (LV) wall segment has always been regarded as appearing in the rapid filling phase. However, we find some segments of which early diastolic peak velocities appear in the isovolumic relaxation period (PVIVR segments). The present study aimed to investigate the characteristics ...
Duygu H - - 2008
OBJECTIVES: Levosimendan is a novel positive inotropic calcium sensitiser agent used in acute left heart failure. In this study, the effect of levosimendan on the right ventricular systolic and diastolic functions was evaluated by tissue Doppler comparing them with dobutamine in patients with ischaemic heart failure. METHODS: Patients having an ...
Poh Kian-Keong - - 2008
BACKGROUND: Intact left atrial booster pump function helps maintain cardiac compensation in patients with aortic valve stenosis (AS). Because late diastolic mitral annular (A') velocity reflects left atrial systolic function, we hypothesized that A' velocity correlates with plasma N-terminal pro-B-type natriuretic peptide (NT-proBNP) level and clinical outcome in AS. METHODS: ...
Moladoust H - - 2008
Tissue Doppler imaging (TDI) has been suggested for quantitative analysis of regional myocardial function. Myocardial movement included different mechanical phases with different duration and tissue velocity profiles need to high sampling rate in the acquisition of tissue velocity imaging for phases with shorter duration. The aim of this study is ...
Choi Eui-Young - - 2008
OBJECTIVES: The aim of this study was to define the phenotypic spectrum of apical hypertrophic cardiomyopathy (ApHCM) and clinical characteristics pertaining to identified subtypes. METHODS: In 182 consecutive ApHCM patients (58.9 +/- 11.2 years; 142 men) with left ventricular ejection fraction > or =50%, we measured end-diastolic wall thickness of ...
Chintala K - - 2008
OBJECTIVE: Pulmonary venous Doppler (PVD) patterns are abnormal in fetuses with hypoplastic left heart syndrome (HLHS) with restricted foramen ovale (rFO) when compared with healthy fetuses. The objective of this study was to define PVD patterns in HLHS fetuses with an unrestricted or patent foramen ovale (pFO). DESIGN: 27 fetuses ...
Tayyareci Yelda - - 2008
AIM: The aim of the study was to determine if the tissue Doppler imaging (TDI)-derived myocardial acceleration during isovolumic contraction (IVA) of tricuspid lateral annulus could be used in early detection of RV systolic dysfunction in patients with mitral stenosis (MS), before the clinical signs of systemic venous congestion occur. ...
Mandysová Eva - - 2008
AIMS: To assess the reproducibility of tissue Doppler myocardial velocities in patients with dilated ventricles and markedly reduced systolic function (ejection fraction <35%). METHODS AND RESULTS: Forty-one patients referred for cardiac resynchronization therapy (CRT) were evaluated using tissue Doppler echocardiography. The inter and intra-individual reproducibility of peak systolic myocardial velocities ...
Yamamoto Akira - - 2007
OBJECTIVE: The relationships among regional diastolic impairment, the elongation of global time to peak filling rate (g-TPF), and global diastolic function were examined by a novel program using electrocardiography-gated myocardial perfusion single-photon emission computed tomography (SPECT) (GMPS) in heart failure (HF). METHODS: Fifteen control subjects and 70 HF patients, New ...
Sevimli Serdar - - 2007
BACKGROUND: This study aimed to evaluate the efficiency of transesophageal tissue Doppler echocardiography (TDE) in evaluation of the left ventricular functions. To this end, the data obtained by transoesophageal tissue Doppler echocardiography and by transthoracic tissue Doppler echocardiography were compared simultaneously. METHODS: Nineteen consecutive patients (7 female and 12 male) ...
Coulon Paul - - 2007
PURPOSE: Using a videodensitometric technique developed in our center we investigated whether the amplitude of variation of gray levels in the interventricular septum was related to functional parameters, especially ventricular filling as studied by doppler tissue imaging (DTI) in hypertensive patients. METHODS AND RESULTS: We included 35 hypertensive patients from ...
Allanore Y - - 2007
Systemic sclerosis (SSc) is a connective tissue disease characterised by diffuse vascular lesions and fibrosis. Primary myocardial involvement is common in SSc and, when clinically evident, appears as a poor prognostic factor. An increasing body of evidence suggests that myocardial involvement is due, at least in part, to microcirculation impairment ...
Singh Narinder P - - 2007
Cardiovascular events are the principal cause of mortality in patients with chronic kidney disease (CKD). Secondary hyperparathyroidism (SHPT), a common complication of CKD, contributes to cardiac dysfunction. This study is an attempt to demonstrate the effects of parathyroid hormone suppression with oral calcitriol on cardiovascular hemodynamics. Twenty predialysis CKD patients ...
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