نتایج جستجو برای: left ventricular ejection fraction
تعداد نتایج: 498231 فیلتر نتایج به سال:
Prevalence of Heart Failure With Preserved Left Ventricular Ejection Fraction More than one-half of people with heart failure (HF) have a preserved left ventricular ejection fraction (HFpEF). Patients with HFpEF, commonly referred to as diastolic HF, have symptoms and/or signs of HF and a left ventricular ejection fraction (LVEF) >40% to 50%. The prevalence of HFpEF exceeds 3 million in the Uni...
background: left ventricular dysfunction is one of the most powerful predictors of early and late outcomes in patients who undergo coronary artery bypass grafting (cabg). the aim of this study was to assess the early results of cabg that predict 30-day mortality and prolonged length of hospital stay (los) after cabg in patients with an ejection fraction (ef) of 30% or less. methods: seven hundr...
OBJECTIVE This study aims to study the prognostic impact of left ventricular function on mortality and examine the effect of age on the prognostic value of left ventricular function. METHODS We examined the myocardial ischaemia national audit project registry (2006-2010) data with a mean follow-up of 2.1 years. Left ventricular function was categorised into good (ejection fraction ⩾50%), mode...
Background: This study aims to evaluate the effect of exercise training on heart rate variability (HRV) and to determine the correlation between parameters of HRV and the ejection fraction in patients with heart failure after percutaneous coronary intervention.Material and Methods: Fifty patients with left ventricular ejection fraction ≤ 40% undergone percutaneous coronary intervention were r...
Background: Cardiac resynchronization therapy (CRT) has proved as an efficient treatment in patients with end stage Heart failure. Previous studies showed the beneficial long term effects of CRT on the severity of mitral regurgitation (MR). The aim of this study was to evaluate acute effects of CRT on severity of MR. Methods: This study was a double blind randomized trial performed from 1387 t...
to evaluate the prognostic significance of clinicopathological measurement in the diagnosis of acute myocardial infarction (mi) in sheep, acute mi was induced by ligation of left anterior descending coronary artery (lad). for this purpose, twenty four healthy sheep were divided into the sham-operated or control group (group i, thoracotomy without mi) and the experimental group (group ii, with m...
OBJECTIVE To assess independent determinants of beat to beat variation in left ventricular performance during atrial fibrillation. DESIGN Prospective study. SETTING University hospital. PATIENTS Seven patients with chronic non-valvar atrial fibrillation. INTERVENTIONS Invasive and non-invasive haemodynamic variables were assessed using a non-imaging computerised nuclear probe, a balloon...
Echocardiography was used to compare the left ventricular function of 43 female patients with stable systemic lupus erythematosus with 93 healthy females in 3 age groups. Left ventricular systolic function was evaluated by the left ventricular ejection fraction and left ventricular diastolic function was evaluated by the diastolic descent rate of the anterior mitral leaflet (DDR), the ratio of ...
Fourteen consecutive patients undergoing left ventricular aneurysmectomy and coronary artery bypass grafting were studied by multiple gated ventricular scintigraphy at rest and during exercise before and at six weeks and six months after surgery. All had congestive heart failure and 12 angina pectoris. Before operation left ventricular ejection fraction fell significantly with exercise, as did ...
Left ventricular ejection fraction is determined by both global myocardial strain and wall thickness
OBJECTIVES The purpose of this study was to determine the mathematical relationship between left ventricular ejection fraction and global myocardial strain. A reduction in myocardial strain would be expected to cause a fall in ejection fraction. However, there is abundant evidence that abnormalities of myocardial strain can occur with a normal ejection fraction. Explanations such as a compensat...
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