Search Results
Results 301 - 350 of 2296
< 2 3 4 5 6 7 8 9 10 11 12 >
Aje Akinyemi - - 2006
Hypertension is a global problem and it is prevalent in Nigeria. Left ventricular hypertrophy is a major complication of hypertension with risk of sudden death and arrhythmias among others. Abnormal left ventricular geometric patterns also increase the burden of morbidity and mortality. It is therefore important to know the different ...
Grignola Juan C - - 2006
The Doppler-derived Tei index has been reported to be clinically useful in assessing global right ventricular function. It could increase in response to combinations of increased pulmonary artery pressure and/or ventricular dysfunction. We compared the Tei index with invasive measurements of right ventricular function during acute pulmonary hypertension. Right and ...
Dawson Adelle - - 2005
BACKGROUND: B-type natriuretic peptide (BNP) increases the risk of death and cardiovascular events in patients without heart failure, even at BNP values within the "normal" range. The reasons for this are unclear. METHODS: We performed two separate studies (n = 33 and n = 129) on subjects with type 2 ...
Masliza M - - 2005
INTRODUCTION: The prevalence and severity of diastolic dysfunction (DD) among newly diagnosed hypertensives (NDHT) is not fully established. The aim of this study was to evaluate left ventricular diastolic function (LVDF) in patients with NDHT. MATERIALS AND METHODS: This study involved 396 subjects (198 NDHT, age and gender matched 198 ...
Guérin A P - - 2005
Epidemiological and clinical studies have shown that cardiovascular disease in patients with end-stage renal disease (ESRD) is frequently related to damage of large conduit arteries. Arterial disease is responsible for the high incidence of ischaemic heart disease, peripheral artery diseases, left ventricular hypertrophy and congestive heart failure. The vascular complications ...
Kirkpantur Alper - - 2005
Cardiovascular disease is the major cause of mortality in maintenance hemodialysis patients. Left ventricular dysfunction is present in approximately 80% of these patients and is highly predictive of future ischemic heart disease, cardiac failure, and death. Anemia has been identified as one of several risk factors responsible for cardiac complications. ...
Conrady Alexandra O - - 2005
BACKGROUND: Left ventricular hypertrophy (LVH), as well as the geometry pattern of the left ventricle, is believed to be an independent risk factor for hypertension. The present study investigated the changes in left ventricular mass, diastolic function and geometry in hypertensive patients in a prospective 5-year follow-up in conjunction with ...
Salles Gil - - 2005
QT interval parameters have been associated with left ventricular hypertrophy (LVH) in hypertensive patients. The aim of this study is to assess this relationship in resistant hypertension and, in particular, to evaluate whether any QT interval parameter could provide additive information for LVH beyond that obtained from the best electrocardiographic ...
Salmasi Abdul-Majeed - - 2005
BACKGROUND: Impaired left ventricular diastolic function is not uncommon in patients with either diabetes mellitus or hypertension. This study was carried out to assess the contribution of left ventricular hypertrophy, high blood pressure, preclinical impaired glucose tolerance and diabetes mellitus to left ventricular diastolic function in patients attending a hypertension ...
Hlaing Thinn - - 2005
BACKGROUND: Action potential duration in the right ventricle is normally shorter than that in the left. We tested the hypothesis that there may be intrinsic differences in the QT and Tp-e (an interval from the peak to the end of the T wave) intervals between the left and right chest ...
Dernellis John - - 2005
BACKGROUND: A restrictive pattern of left ventricular filling is often present in patients with severe heart failure. Although the hemodynamic effects of levosimendan have been studied, the effects of levosimendan on LV filling pattern have not been investigated. METHODS: Pulsed-wave Doppler mitral (transthoracic) and pulmonary venous flow (transesophageal) velocity curves ...
Maurer Mathew S - - 2005
BACKGROUND: Patients with diastolic heart failure are thought to have a normal or small ventricle with impaired ventricular filling that requires increased filling pressure to maintain normal stroke volume. In this study we test the hypothesis that patients with hypertensive diastolic heart failure have increased left ventricular volumes compared with ...
Lee Kaeng W - - 2005
BACKGROUND: Pulsed tissue Doppler imaging (TDI) allows direct measurement of systolic and diastolic function of the left ventricle. In patients with coronary artery disease (CAD), myocardial ischemia-related impaired diastolic function may be linked to systemic endothelial damage/dysfunction and increased thrombogenesis. We hypothesized relationships between TDI-defined diastolic dysfunction and plasma von ...
Ferrara Liberato Aldo - - 2005
BACKGROUND: There is no definite consensus on which indexation of left ventricular mass (LVM) should be used to better identify left ventricular hypertrophy (LVH). Left ventricular mass has been adjusted to height, to height2.7(h2.7) and to body surface area (BSA). The aims of the present study were to evaluate the ...
Tezer Mesut S - - 2005
OBJECTIVE: Adenoid hypertrophy causing upper airway obstruction can cause cardiovascular complications, including pulmonary hypertension and right heart failure in children. Adenoidal-nasopharyngeal ratio (ANR) is a practical, non-invasive and reliable method to evaluate adenoid enlargement. Our aim was to evaluate a possible association between ANR and echocardiographic parameters of right ventricle. ...
Andersen N H - - 2005
AIMS: To characterize left ventricular function in hypertensive patients with Type 2 diabetes and normal ejection fraction, and to relate these findings to pathogenic factors and clinical risk markers. METHODS: We examined 70 hypertensive patients with Type 2 diabetes mellitus with ejection fraction > 0.55 and fractional shortening > 0.25, ...
Ozkan Mustafa - - 2005
BACKGROUND: Myocardial performance index (MPI) is a valuable index of global ventricular performance. It is almost always measured by Doppler echocardiography. The purposes of this study were (I) to compare MPI measured by catheterization (MPIc) and that measured by Doppler echocardiography (MPId), and (2) to compare it with the functional ...
Bettendorff-Bakman D-E - - 2006
During the rapid diastolic filling phase at rest, the ventricles of the human heart double approximately in volume. In order to investigate whether the ventricular filling pressures measured under physiological conditions can give rise to such an extensive augmentation in ventricular volumes, a finite element model of the human right ...
Zakynthinos E - - 2005
The effect of antihypertensive therapy on arrhythmias is controversial. An initial study in patients with chronic heart failure indicated that losartan, an angiotensin II receptor antagonist, may possess antiarrhythmic properties. However, the effect of AT1 receptor antagonists on arrhythmias of subjects with good systolic function has never been evaluated. Thirty-nine ...
Whalley Gillian A - - 2005
OBJECTIVE: Heart failure is associated with poor prognosis and the differentiation of patients on the basis of diastolic filling patterns helps to identify several groups of patients with incrementally higher risk. However, this is reliant on accurate definition of filling patterns. The aim of this study was to compare preload ...
Matsumoto Afonso Y - - 2005
AIM: The aim of this study was to analyze the relationships among exercise capacity (EC), hypertrophy, and diastolic function in nonobstructive hypertrophic cardiomyopathy (NOHCM). METHODS AND RESULTS: Twenty-seven patients with NOHCM were studied. Left ventricular hypertrophy (LVH) was determined by appropriate echocardiographic indexes. For diastolic function evaluation, the following were ...
Parrinello G - - 2005
This study has been designed to evaluate the relationship among transforming growth factor beta1 (TGFbeta1) and some measurements of diastolic function in a population of hypertensive subjects with normal left ventricular ejection fraction. We studied 67 hypertensive outpatients who according to their BMI levels were subdivided into three groups: lean ...
Mizuno Tomohiro - - 2005
OBJECTIVES: Left ventricular assist devices are proposed as a bridge to recovery, but recurrent ventricular deterioration has limited this approach. We describe a new animal model that simulates the effects of left ventricular assist device unloading and then reloading after device removal. The model might facilitate the evaluation of interventions ...
Ganion Vincent - - 2005
In patients with heart failure (HF), a convenient and accurate assessment of HF status could enhance titration of medications and possibly reduce hospitalizations for fluid overload. This study examined the feasibility of monitoring HF status by measuring intrathoracic impedance with either an implantable cardioverter-defibrillator or a pacemaker. Six canines were ...
Bicik Zerrin Z Department of Nephrology, Medical Faculty, Abant lzzet Baysal University, Düzce, - - 2005
Many studies have shown that transforming growth factor(TGF)-β has a major role in renal scarring in many renal diseases and hypertension. The primary aim of this study was to investigate both the relationship between hypertension and serum and urinary levels of TGF-β2 (a more sensitive isoform for glomeruli than TGF-β1), ...
Luque Manuel - - 2005
Left ventricular hypertrophy increases the risk for cardiovascular target organ damage, myocardial infarction, and stroke. The authors assessed the patterns of ventricular adaptation in 107 essential hypertensives whose treatment had been withdrawn and its modification after 1 year of hypertension treatment. Blood pressure decreased from 158+/-17/96+/-12 mm Hg to 137+/-15/83+/-10 ...
Tükek Tufan - - 2005
OBJECTIVE: It has been previously reported that intraventricular flow patterns in some hypertensive patients with left ventricular hypertrophy, change to patterns similar to flow profiles of hypertrophic cardiomyopathy. The purpose of the study was to assess left ventricular outflow and mid-septal intraventricular flow patterns in hypertensive and normotensive patients. METHODS: ...
SzymaƄski Piotr P Department of Noninvasive Cardiology and Adult Congenital Heart Diseases, National Institute of Cardiology, Alpejska 42, 04-628 Warsaw, Poland. - - 2005
The pressure overload may be responsible for the failure of the systemic ventricle. No study so far has evaluated the association between arterial blood pressure values and right ventricular function in adults with atrially corrected complete transposition. This was a retrospective analysis. The studied population consisted of 60 patients with ...
Eryonucu Beyhan - - 2005
BACKGROUND: Sodium nitroprusside (NIP) and nitroglycerin (NIT) are frequently selected agents for acutely reducing blood pressure. However, it is not clear which agent is more efficacious in improving left ventricular filling pressure in hypertensive crises. OBJECTIVE: To compare the acute effects of nitroglycerin (NIT) and nitroprusside (NIP) on transmitral Doppler ...
Sakaguchi Genichi - - 2005
BACKGROUND: We have developed a hepatocyte growth factor (HGF)-incorporating gelatin hydrogel sheet (HGF sheet), which was designed to release HGF more than 2 weeks in vivo. The present study investigated whether the HGF sheet could prevent the progression of heart failure in stroke-prone spontaneously hypertensive rats. METHODS: Stroke-prone spontaneously hypertensive ...
Litwak Kenneth N - - 2005
A large animal with diminished cardiac function would be desirable for chronic testing of pathophysiologic responses to many human-sized devices and other therapies, especially if this model did not require prior surgical interventions or extensive technical skill and expense. Overdoses of monensin, widely used in the cattle industry as a ...
Cantor Elliott J F - - 2005
Heart failure is a leading cause of death that is reaching epidemic proportions. It is a clinical syndrome attributable to a multitude of factors that begins with a compensatory response known as hypertrophy, followed by a decompensatory response that eventually results in failure. Heart failure can be triggered when the ...
Little William C - - 2005
There is little objective to guide the therapy of patients with diastolic heart failure. Because of the similarities of pathophysiology abnormalities in diastolic and systolic heart failure, it is a reasonable inference to suggest that the proven therapy for systolic heart failure may also be of benefit in patients with ...
Kim Byung-Soo - - 2005
BACKGROUND: C-reactive protein (CRP), which reflects chronic inflammation, is a strong predictor of cardiovascular mortality in hemodialysis patients. We investigated whether persistent elevation of CRP is associated with cardiac function and morphology in patients maintained on hemodialysis. METHODS: Predialysis high-sensitivity CRP (hs-CRP) was measured twice at an interval of 3 ...
De Sutter Johan - - 2005
The ratio of the transmitral early peak velocity (E) evaluated by conventional Doppler imaging over early diastolic mitral annulus velocity (E') evaluated by tissue Doppler imaging has been proposed as a noninvasive marker for left ventricular filling pressure. We evaluated 174 normal patients and 86 patients with hypertension and LV ...
Tsujimoto Ikuko - - 2005
The free radical scavenger 3-methyl-1-phenyl-2-pyrazolin-5-one (edaravone) is used to treat patients with ischemic brain damage. We and others reported previously that in vitro and in vivo reactive oxygen species (ROS) act as second messengers to develop cardiac hypertrophy. In this study, we used an in vivo murine model of pressure ...
Cuspidi Cesare - - 2005
BACKGROUND: The cardiac effects of hypertension include a variety of structural changes such as increases in left ventricular mass (LVM) and left atrium (LA) size. Although data on hypertension-induced left ventricular changes are extensive, relatively little information is available on LA size from large-scale studies. OBJECTIVE: We sought to assess ...
Schott Peter - - 2005
Treatment with monocrotaline causes pulmonary hypertension in rats. This results in severe pressure overload-induced hypertrophy of the right ventricles, whilst the normally loaded left ventricles do not hypertrophy. Both ventricles are affected by enhanced neuroendocrine stimulation in this model. We analyzed in this model load-induced and catecholamine-induced changes of right ...
Crepaz Roberto - - 2005
AIMS: To identify factors predisposing to abnormal left ventricular geometry and mechanics in 52 patients after successful repair of aortic coarctation. METHODS AND RESULTS: We evaluated left ventricular remodelling, systolic midwall mechanics, and isthmic gradient by echo-Doppler, systemic blood pressure at rest/exercise and by ambulatory blood pressure monitoring, and the ...
Bruch Christian - - 2005
The diagnostic usefulness of the mitral E/E' ratio (derived from tissue Doppler imaging) as an estimate of left ventricular filling pressures was studied in 28 patients with diastolic heart failure (defined by heart failure signs and symptoms but with preserved ejection fraction) and in 46 patients with systolic heart failure ...
Keser Nurgül N Department of Cardiology, University of Maltepe-Istanbul, Istanbul, Turkey. - - 2005
Modified TEI index is pointed to be more effective in the evaluation of global cardiac functions compared to systolic and diastolic measurements alone. We planned to determine its applicability in hypertension and relation with left ventricular mass index (LVMI). We studied 48 patients with mild/moderate hypertension and normal coronary angiograms. ...
Obert P - - 2005
Little attention has been paid to children with respect to factors controlling maximal oxygen uptake (V.O (2max)). This study was therefore specifically designed to examine the potential relationships between cardiac size, diastolic function and O (2) carrying capacity with maximal aerobic capacity. Specifically, body size indices (body surface area, lean ...
Voon Wen-Chol - - 2005
To evaluate the propagation velocity of isovolumic relaxation flow within the left ventricle (IRFPV) associated with impaired ventricular relaxation, 49 patients with diseases known to impair ventricular relaxation (disease group) and 38 age-matched control subjects (control group) were studied. IRFPV was measured as the slope of the first aliasing velocity ...
Weinrauch Larry A - - 2005
Left ventricular hypertrophy regression was postulated more likely to occur in diabetic patients when renal function was preserved. Seventeen type 1 diabetic patients followed for 12 months while receiving protocol-driven glycemic and blood pressure control had baseline and 12-month echocardiography. Despite identical treatment resulting in similar blood pressures, patients with ...
Maina Charles I - - 2005
Hypertension contributes significantly to the development of left ventricular hypertrophy. Left ventricular hypertrophy is associated with increased incidence of sudden cardiac death. Recognition and management of hypertension is, therefore, imperative. To establish whether propranolol can reverse left ventricular hypertrophy in hypertensive rats. Hypertension was induced in male albino rats by ...
Kozakova Michaela - - 2005
In many hypertensive patients, left ventricular pump function is normal at rest but abnormal during exercise. Myocardial dysfunction or altered left ventricular loading may be responsible for this finding. To verify the hypothesis of impaired myocardial functional reserve in the hypertensive heart, we assessed the response of stress-adjusted midwall shortening ...
M.S. Jaafar, O. Hamid, ...
The relationship between left ventricular mass (LVM) and the mean arterial blood pressure (MAP) was investigated, using M-Mode echocardiography. MAP was higher in hypertensive patients (p&lt;0.05, n=9) compared to that of controlled subjects. The results showed that LVM index for hypertensive patients was significantly higher (p&lt;0.05, n=9) than that for ...
Aessopos Athanasios - - 2005
Splenomegaly is common in beta-thalassemia, bearing some particular hemodynamic features, while splenectomy is an established therapeutic intervention in these patients. Their effects, however, on systemic hemodynamics and thalassemia heart disease have not yet been assessed. The study included 32 consecutive patients, 13 with thalassemia major (TM) and 19 with thalassemia ...
Matoba Satoaki - - 2005
The feasibility of Doppler tissue imaging (DTI) for assessing global systolic function has not been determined in small animals, particularly at near-conscious heart rates. Therefore, we compared DTI measurements with conventional M-mode-derived fractional shortening in murine global left ventricular systolic dysfunction induced by intraperitoneal doxorubicin (Dox) injection. In all, 13 ...
Adebiyi Adewole A - - 2005
BACKGROUND: Hypertension is associated with left ventricular diastolic function abnormalities. There have been few studies evaluating left ventricular diastolic function in an African populace. MATERIALS AND METHODS: Ninety-eight hypertensives (52 females, 46 males) and 99 normal controls (49 females, 50 males) were recruited for echocardiography. M-mode measurements and Doppler measurements ...
< 2 3 4 5 6 7 8 9 10 11 12 >