Search Results
Results 101 - 150 of 1386
1 2 3 4 5 6 7 8 9 10 >
Yoshitani Hidetoshi - - 2009
BACKGROUND: Although real-time three-dimensional echocardiography (RT3DE) is useful for delineating the extent and severity of stress-induced wall motion abnormalities during dobutamine stress echocardiography (DSE), it also provides simultaneous multiple two-dimensional cut planes, which may potentially improve the detection of stress-induced wall motion abnormalities. The aim of this study was to ...
Abdel-Salam Zainab - - 2009
OBJECTIVE: Pharmacological stress echocardiography is widely accepted for identifying potential contractile recovery after revascularization. We sought to compare the prognostic power of three pharmacological stress protocols for predicting contractile recovery of myocardial segments at varying degrees of dyssynergy. METHODS: We enrolled 100 consecutive patients with significant coronary stenosis amenable for ...
Bucerius Jan - - 2009
The aim of the present study was to evaluate the prognostic value of hemodynamic variables during ergometric stress testing for (99m)Tc-sestamibi myocardial perfusion scintigraphy (MPS) as compared to several patient-related variables and MPS results with regard to referral to early coronary angiography (<3 months after MPS; CA) as well as ...
Abraham Jacob - - 2009
OBJECTIVES: The aim of this study was to report a series of patients with stress cardiomyopathy precipitated by the intravenous administration of catecholamines and beta-receptor agonists. BACKGROUND: Stress cardiomyopathy is a syndrome of transient cardiac dysfunction precipitated by intense emotional or physical stress. Excessive sympathetic stimulation is believed to be ...
From Aaron M - - 2009
The mechanisms for abnormal stress echocardiograms (SEs) in patients with normal coronary arteries have not been clearly elucidated. We hypothesized that in some patients, this phenomenon may represent a forme fruste of apical ballooning syndrome (ABS). The aim of the study was to evaluate the characteristics of patients with strongly ...
Duygu Hamza - - 2009
BACKGROUND: Levosimendan improves cardiac contractility without increasing oxygen consumption. However, its effects on ischemia were not supported with the utilization of a noninvasive parameter of myocardial characterization. HYPOTHESIS: The changes observed in integrated backscatter (IBS) may be reflective of change in myocardial ischemia. In this study, the effect of levosimendan ...
Cabani Enrico - - 2009
Late complications after pharmacological stress echocardiography are infrequent but potentially dreadful events. We report the case of a 80-year-old woman admitted to hospital for rest chest pain with trivial troponin increase, normal left ventricular function and no significant ECG changes. A dobutamine stress echocardiography was performed for diagnostic purpose, with ...
Dattilo Giuseppe - - 2010
Stress echocardiography is today the best possible imaging choice in the field of noninvasive diagnosis of coronary artery disease. Dobutamine stress echocardiography (DSE) and Dobutamine-atropine stress echocardiography (DASE) have been studied. Handgrip (HG) exercise has been rarely studied in stress echocardiography. Aim of the study was to investigate the safe, ...
Lerakis Stamatios - - 2010
Dobutamine stress echocardiography (DSE) has been proposed as a tool for risk stratification of patients with acute chest pain (ACP). In this single-center study, we evaluated the negative predictive value of DSE in 178 patients who presented with low-risk ACP (normal or inconclusive electrocardiogram and negative markers of myocardial damage) ...
Bart Bradley A - - 2009
OBJECTIVES: We sought to assess and compare the diagnostic accuracy and prognostic value of dobutamine stress echocardiography (DSE), dobutamine SPECT, and adenosine SPECT myocardial perfusion imaging (MPI) in patients with end-stage renal disease (ESRD). BACKGROUND: The optimal stress imaging modality for patients with ESRD has not yet been determined. METHODS: ...
Osuorji Ikenna - - 2009
Broken heart syndrome, otherwise known as takotsubo syndrome, is stress-induced cardiomyopathy. Clinical presentation mimics acute ST segment elevation myocardial infarction, but with characteristic left ventricular apical ballooning. The mechanism is linked to overstimulation of the sympathetic system from high circulating catecholamine levels. We report a 46-year-old Caucasian female whose treatment ...
Toumanidis Savvas T - - 2009
INTRODUCTION: Transesophageal atrial pacing stress echocardiography (TEAPSE) has been proposed as an alternative stress echo test in selected patients with known or suspected coronary artery disease. The purpose of this study was to determine: (1) whether TEAPSE could serve as a suitable provocative stress test in patients with stroke and ...
Soufer Robert - - 2009
Myocardial ischemia that results from emotional provocation occurs in as many as 30% to 50% of patients with coronary artery disease during the discourse of their lives. This emotionally provoked or mental stress ischemia is associated with poor prognosis, with emerging treatment strategies. This article outlines the conceptual constructs that ...
Chen Fangping - - 2009
Recent clinical reports strongly support the intriguing possibility that emotional stress alone is sufficient to cause reversible myocardial dysfunction in patients. We previously reported that a combination of prenatal stress followed by restraint stress (PS+R) results in echocardiographic evidence of myocardial dysfunction in anesthetized rats compared with control rats subjected ...
Govind Satish C - - 2009
AIMS: We sought to evaluate the utility of speckle tracking echocardiography (STE) for detecting left ventricular (LV) mechanical abnormalities during low-dose (20 microg) dobutamine stress (DSE). METHODS AND RESULTS: Twenty-nine patients (56 +/- 12 years) with a history of recent acute coronary events (ACE) underwent STE-DSE. Left ventricular images, sampled ...
Strigl Sebastian - - 2009
PURPOSE: To evaluate the feasibility of dobutamine stress magnetic resonance (DSMR) in pediatric patients. MATERIALS AND METHODS: The medical records of all DSMR studies performed on patients < or =22 years old at a single institution were retrospectively reviewed. The DSMR protocol included dobutamine doses up to 40 microg/kg/minute and ...
Zupancic Melanie L - - 2009
Acute psychological stress causes a number of physiologic responses that can trigger acute coronary syndromes in individuals with silent coronary artery disease. The mechanisms behind this phenomena have been the subject of much speculation. The following is a case report and brief review of the literature. A PubMed search was ...
Lønnebakken Mai Tone - - 2009
BACKGROUND: Myocardial contrast stress echocardiography (stress MCE) is a novel method for diagnosing coronary artery disease (CAD). Few studies have compared the diagnosis of ischemia by stress MCE to angiographic CAD. METHODS: Dobutamine stress MCE and SonoVue contrast infusion were performed before an elective percutaneous coronary intervention in 37 patients ...
Sadeghian Hakimeh - - 2009
INTRODUCTION: Dobutamine stress echocardiography (DSE) and myocardial perfusion scan (MPS) are commonly used to detect viable myocardium. We designed this study to compare the results of these two methods in detecting myocardial viability. METHODS: We studied 736 segments from 46 patients (42 men, mean age 56 years), with coronary artery ...
Chiribiri Amedeo - - 2009
Cardiac stress magnetic resonance (MR) testing has been developed and optimized in the past decade, reaching a high diagnostic performance. Its efficacy, together with its excellent safety profile and increasing availability, make cardiac stress MR testing one of the diagnostic modalities of choice for detecting ischemia. A noticeable series of ...
Fujino Masashi - - 2009
In a 57-year-old woman who was referred as refractory diastolic heart failure, dobutamine stress echocardiography facilitated the diagnosis of acute worsening of mitral regurgitation accompanied with latent left ventricular outflow tract obstruction as a cause of recurrent flash pulmonary edema. Echocardiography revealed the presence of sigmoid septum and concentric left ...
Dekleva Milica - - 2009
Hyperbaric oxygen treatment (HBO) could transiently reverse hypoxia during acute myocardial infarction (AMI). In order to evaluate whether early HBO can identify viable segments after AMI, improvement of wall motion score index (WMSI) after HBO was compared to dobutamine stress echocardiography (DSE). Thirty-one patients with first AMI treated with thrombolysis ...
Hintsanen Mirka - - 2009
BACKGROUND: Novelty seeking temperament has been associated with higher coronary heart disease risk factors, but the mechanism behind the association is open. Cardiac stress response is a potential candidate. PURPOSE: Cardiac stress reactivity and recovery was studied in 29 healthy subjects (aged 22-37 years) scoring extremely high (n = 16) ...
Walsh Thomas F TF Department of Internal Medicine (Cardiology Section), Wake Forest University School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina, USA. - - 2009
To determine if patients without dobutamine induced left ventricular wall motion abnormalities (WMA) but an increased LV end-diastolic wall thickness (EDWT) exhibit a favorable cardiac prognosis. Between 1999 and 2001, 175 patients underwent a dobutamine stress cardiovascular magnetic resonance (DCMR) procedure utilizing gradient-echo cines. Participants had a LV ejection fraction ...
Weissman Gaby - - 2009
The presence of myocardial viability in patients with chronic ischemic cardiomyopathy has significant predictive value for improvement of left ventricular function after revascularization. Myocardial viability also predicts improved survival for patients undergoing coronary revascularization as opposed to medical therapy. Evaluation of viability can be pursued by different imaging techniques. Dobutamine ...
Narayan Pradeep - - 2008
BACKGROUND: We sought to investigate the effect of patient prosthesis mismatch on hemodynamic profile using dobutamine stress echocardiography, and to evaluate midterm survival of patients undergoing aortic valve replacement with 19-mm Perimount (Baxter Healthcare, Santa Ana, California) aortic prosthetic valves. METHODS: Between December 1, 1999, and August 17, 2005, 147 ...
Karabinos Ilias - - 2008
Sustained ventricular tachycardia during dobutamine stress echocardiography is a rare complication of dobutamine stress echocardiography. It may be related to reduced left ventricular function and prior myocardial infarction but cannot be used as a sensitive or specific sign for myocardial ischemia. The clinical significance of dobutamine stress echocardiography-induced sustained ventricular ...
Kobayashi Masakazu - - 2008
We performed dobutamine stress testing for evaluation of myocardial contractile reserve in asymptomatic or mildly symptomatic patients with dilated cardiomyopathy (DCM). Catecholamine sensitivity is reduced in failing hearts as a result of myocardial abnormalities in the beta-adrenergic receptor signaling pathway. However, little is known about adrenergic myocardial contractile reserve in ...
Cabrera-Bueno Fernando J - - 2009
To determine whether patients with no heart disease who develop dynamic left ventricular outflow obstruction (DLVOTO) during dobutamine echocardiography (DE) reproduce the phenomenon during exercise echocardiography (EE), DE and EE were performed in 78 patients (59 +/- 9 years) with effort angina and no alterations in SPECT. Thirty-eight (48.7%) patients ...
Burg Matthew M MM Section of Cardiovascular Medicine, Yale University School of Medicine, New Haven, CT 06520-8017, USA. - - 2009
To test an easily administered, noninvasive technology to identify vulnerability to mental stress ischemia. Myocardial ischemia provoked by emotional stress (MSI) in patients with stable coronary artery disease (CAD) predicts major adverse cardiac events. A clinically useful tool to risk stratify patients on this factor is not available. Patients with ...
Tsutsui Jeane Mike - - 2008
BACKGROUND: Left atrial volume indexed (LAVI) has been reported as a predictor of cardiovascular events. We sought to determine the prognostic value of LAVI for predicting the outcome of patients who underwent dobutamine stress echocardiography (DSE) for known or suspected coronary artery disease (CAD). METHODS: From January 2000 to July ...
Vaidyanathan Lekshmi - - 2008
Dobutamine is commonly administered as a pharmacologic stressor in patients with limitations precluding exercise testing. The case report presented is one of transient complete heart block resulting from dobutamine sestamibi stress testing. Shortly after initiating the dobutamine infusion, the patient became pale and presyncopal, with hypotension and a heart rate ...
Shaikh Kamran - - 2008
The aim was to evaluate the safety of stress echocardiography using contrast (CE) for endocardial enhancement compared with a noncontrast (NCE) cohort in a large nonselect population. The recent Food and Drug Administration warning cited lack of data for safety regarding the use of contrast in conjunction with stress echocardiography. ...
Buyse Gunnar M - - 2009
Duchenne muscular dystrophy (DMD) is a severe and still incurable disease, with heart failure as a leading cause of death. The identification of a disease-modifying therapy may require early-initiated and long-term administration, but such type of therapeutic trial is not evident in humans. We have performed such a trial of ...
Goineau Sonia - - 2008
Cardiomyopathic Syrian hamsters (Bio TO-2 dilated strain) constitute an animal model of congestive heart failure, which progressively develops an alteration of cardiac function leading to decreased arterial blood pressure and musculo-cutaneous blood flow associated with a complex process of cardiac remodeling including left ventricle dilation, wall thinning, and greater collagen ...
Pischke Claudia R - - 2008
OBJECTIVE: To focus on psychological well-being in the Lifestyle Heart Trial (LHT), an intensive lifestyle intervention including diet, exercise, stress management, and group support that previously demonstrated maintenance of comprehensive lifestyle changes and reversal of coronary artery stenosis at 1 and 5 years. DESIGN AND MAIN OUTCOME MEASURES: The LHT ...
Pedone Chiara - - 2008
The clinical utility of stress testing in patients without angina pectoris after revascularization has been questioned. Dobutamine stress echocardiography (DSE) is an established technique for detection of myocardial ischemia and cardiac risk stratification. We studied the prognostic value of DSE in 393 patients without typical angina pectoris after coronary revascularization. ...
Kemdem A - - 2010
A 72-year-old man presented with an acute myocardial infarction, he did not receive any reperfusion therapy because he presented as a non-ST elevation myocardial infarction (MI). A dobutamine stress echocardiography was done five days after. A partial rupture of the posterior papillary muscle occurred during the stress test. The patient ...
Ikonomidis Ignatios - - 2008
BACKGROUND: Interleukin-6 (IL-6) and tissue factor (TF) are elevated after myocardial ischemia during dobutamine stress echo (DSE). We examined the incremental prognostic value of IL-6 or TF measured during DSE over echocardiographic and clinical factors in patients with chronic coronary artery disease (CAD). METHODS: We studied 106 patients with angiographically ...
Gimelli Alessia - - 2008
BACKGROUND: We sought to investigate whether the paucity of anginal symptoms in patients with ischemic cardiomyopathy reflects a reduction in the severity of stress-induced myocardial ischemia. METHODS AND RESULTS: We selected 38 patients with coronary artery disease and severe left ventricular dysfunction (ejection fraction [EF] <or=25%) (group 1), who underwent ...
Dall'Armellina Erica - - 2008
The purpose of this study was to assess the utility of dobutamine cardiovascular magnetic resonance (DCMR) results for predicting cardiac events in individuals with reduced left ventricular ejection fraction (LVEF). It is unknown whether DCMR results identify a poor cardiac prognosis when the resting LVEF is moderately to severely reduced. ...
Sicari Rosa - - 2008
Stress echocardiography is the combination of 2D echocardiography with a physical, pharmacological or electrical stress. The diagnostic end point for the detection of myocardial ischemia is the induction of a transient worsening in regional function during stress. Stress echocardiography provides similar diagnostic and prognostic accuracy as radionuclide stress perfusion imaging, ...
Soto Pablo F PF Cardiovascular Div., Washington Univ. School of Medicine, Campus Box 8225, 660 S. Euclid Ave., St. Louis, MO 63110, USA. - - 2008
Aging is associated with decreases in aerobic capacity, cardiac function, and insulin sensitivity as well as alterations in myocardial substrate metabolism. Endurance exercise training (EET) improves cardiac function in a gender-specific manner, and EET has been shown to improve whole body glucose tolerance, but its effects on myocardial metabolism are ...
Fellahi Jean-Luc - - 2008
BACKGROUND: Catecholamines, mainly dobutamine, are often administered without institutional guidelines or prespecified algorithms in cardiac surgery. The current study assessed the consequences on clinical outcome of catecholamines simply based on the clinical judgment of the anesthesiologists after cardiopulmonary bypass in adult cardiac surgery. METHODS: Consecutive patients were enrolled in a ...
Potter D Dean - - 2008
OBJECTIVES: Accurate prediction of recovery of dysfunctional myocardium would optimize risk/benefit analysis among patients with coronary artery disease and decreased ventricular function. Tissue-tagged magnetic resonance imaging permits quantitative assessment of changes in ventricular function and may improve the prediction of myocardial recovery after coronary artery bypass grafting. METHODS: Thirteen patients ...
Rim Se-Joong - - 2008
OBJECTIVES: This study was performed to evaluate the significance of left ventricular (LV) volume response during dobutamine stress echocardiography (DSE) in the prediction of LV volume change during follow-up (F/U) in patients with acute myocardial infarction (AMI). METHODS: Forty-five patients with AMI (male 39, age 57+/-10 y, anterior myocardial infarction ...
Jung Philip H - - 2008
AIMS: Poor image quality remains a limitation of dobutamine stress echocardiography (DSE). This study aimed at investigating the effects of transpulmonary contrast application on endocardial border delineation and diagnostic yield of DSE in patients with intermediate coronary stenoses. The invasively measured fractional flow reserve (FFR) served as the reference standard. ...
Xie Feng - - 2008
OBJECTIVES: The purpose of this study was to test whether the transmural delineation of myocardial perfusion during dobutamine stress imaging with real-time myocardial contrast echocardiography (RTMCE) might permit visualization of dobutamine-induced subendocardial ischemia. BACKGROUND: Significant coronary artery disease can be present despite normal transmural wall thickening (WT) responses during dobutamine ...
Cianfrocca Cinzia - - 2008
BACKGROUND: The assessment of myocardial viability by wall motion (WM) analysis on dobutamine echocardiography is subjective and provides suboptimal results. The aim of this study was to test the hypothesis that the prediction of functional recovery after revascularization can be improved by combining strain rate (SR) imaging, an objective method ...
Hassan Mustafa - - 2008
BACKGROUND: Mental stress is associated with sympathetic adrenergic stimulation and concomitant increases in blood pressure and heart rate. Heritable individual differences in cardiovascular functional response to mental stress may arise from genetic variations in adrenergic receptors, which might produce excessive hemodynamic response to mental stress or create other conditions favoring ...
1 2 3 4 5 6 7 8 9 10 >