OBJECTIVES The aim of this study was to analyze, in the same group of patients, the relationship between multiple variables of coronary lesion and results of exercise, dobutamine and dipyridamole stress echocardiography tests. BACKGROUND Integrated evaluation of the relation between stress echocardiography results and angiographic variables should include not only the assessment of stenosis s...

BACKGROUND Residual viable myocardium identified by dobutamine stress after myocardial infarction may act as an unstable substrate for further events such as subsequent angina and reinfarction. However, in patients with severe global left ventricular dysfunction, viability might be protective rather than detrimental. The aim of this study was to assess the impact on survival of echocardiographi...

OBJECTIVES We evaluated dobutamine stress echocardiography as an initial screening test for a cardiac evaluation before a liver transplant. MATERIALS AND METHODS We retrospectively examined 111 liver transplant candidates who had undergone previous cardiac evaluation; 30 of whom had undergone a liver transplant. RESULTS Eighty patients (72.1%) completed a dobutamine stress echocardiography ...

In tachycardia-induced heart failure (HF), positive lusitropic effects of milrinone or dobutamine were assessed by evaluating the time constant of left ventricular (LV) pressure decay (tau) and Ca(2+)-ATPase activity of the sarcoplasmic reticulum (SR). The peak value of the positive first derivative of LV pressure (+dP/dt) was less increased, either by dobutamine (2-10 microg x kg(-1) x min(-1)...

OBJECTIVE Dobutamine is commonly used to improve ventricular performance in cardiac surgery. The aim of this prospective randomised controlled study was to assess the effectiveness of using low doses of dobutamine during off-pump coronary artery bypass (OPCAB) surgery in order to reduce haemodynamic compromise due to heart displacement. METHODS Thirty-two patients undergoing elective coronary...

AIMS To compare B-type natriuretic peptide (BNP) levels with response of systemic right ventricular function to Dobutamine stress. METHODS AND RESULTS Sixteen patients aged 25.6 +/- 3.7 years (eight each after Senning or Mustard repair of complete transposition) were studied. Transoesophageal imaging was performed in the catheterization laboratory under general anaesthesia before and at the e...

INTRODUCTION Given the importance of β-adrenoceptor signalling in regulating cardiac structure and function, robust protocols are required to assess potential alterations in such regulation in murine models in vivo. METHODS Echocardiography was performed in naïve and stressed (isoprenaline; 30μg/g/day s.c. for up to 14days) mice, in the absence or presence of acute β-adrenergic stimulation (d...

To determine dose-dependent cardiovascular effects of dobutamine and phenylephrine during anesthesia in horses, increasing doses of dobutamine and phenylephrine were infused to 6 healthy Thoroughbred horses. Anesthesia was induced with xylazine, guaifenesin and thiopental and maintained with sevoflurane at 2.8% of end-tidal concentration in all horses. The horses were positioned in right latera...

Dobutamine stress testing is an important non-invasive method for evaluating patients with known or suspected coronary artery disease who are unable to adequately exercise. We present a case of a paradoxical, progressive bradycardia occurring with increasing doses of dobutamine that resulted in stress test interruption.

Dobutamine stress echocardiography is associated with a very low rate of serious complications, lower than 0.5% (death, infarction or sustained ventricular tachycardia). We report the case of a 75 year-old female patient that suffered a fatal left ventricular free wall rupture during a dobutamine stress echocardiography after acute myocardial infarction.