Esther Pérez-David

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Doppler echocardiography remains the most extended clinical modality for the evaluation of left ventricular (LV) function. Current Doppler ultrasound methods, however, are limited to the representation of a single flow velocity component. We thus developed a novel technique to construct 2D time-resolved (2D+t) LV velocity fields from conventional(More)
Early detection of cardiac motion abnormalities is one of the main goals of quantitative cardiac image processing. This article presents a new method to compute the 2-D myocardial motion parameters from gray-scale 2-D echocardiographic sequences, making special emphasis on the validation of the proposed technique in comparison with Doppler tissue imaging.(More)
Vortices may have a role in optimizing the mechanical efficiency and blood mixing of the left ventricle (LV). We aimed to characterize the size, position, circulation, and kinetic energy (KE) of LV main vortex cores in patients with nonischemic dilated cardiomyopathy (NIDCM) and analyze their physiological correlates. We used digital processing of(More)
SPAMM (Spatial Modulation of Magnetization) sequences for tissue tagging suffer from fading of the tags due to tissue T1 decay. This fading is especially important in cardiac imaging, since it affects the frames acquired in the second half of the cardiac cycle. On the other hand, breath-hold sequences are difficult to hold along a prolonged exploration. We(More)
AIMS To evaluate the effect of thrombolysis on mortality and its causes in older patients with acute myocardial infarction (AMI). METHODS AND RESULTS An analysis of 706 consecutive patients > or =75 years old with a first AMI enrolled in the PPRIMM75 registry showed that although there were important differences in baseline characteristics among patients(More)
The assessment of regional left ventricular (LV) function has been an important yet unresolved problem since the introduction of echocardiography as a diagnostic tool. Abnormal regional LV wall motion is an early finding in multiple cardiac pathologies and its diagnosis is of critical importance. In the last few years diagnostic procedures based on combined(More)
BACKGROUND In patients with acute inferior myocardial infarction (AIMI), right ventricular involvement (RVI) is one of the strongest predictors of in-hospital death. We hypothesized that the impact of RVI on AIMI prognosis depends on the patient's age. METHODS AND RESULTS The in-hospital clinical outcome of 798 consecutive patients admitted to the(More)
Ablation procedures have become one of the most efficient treatments for termination of atrial arrhythmias. The aim of the present study is the evaluation of the potential use of noninvasive imaging as a clinical tool for the identification of atrial tachycardia origin prior to an ablation procedure. Simultaneous 67-lead body surface potential recordings(More)
This paper proposes a new method to compute the 2D strain tensor from gray-scale 2D echocardiographic sequences and presents a clinical trial to test its applicability to regional analysis of the left ventricle. Myocardial motion is computed using spatio-temporal non-rigid registration techniques on the whole sequence. The key feature of our method is the(More)
AIM To evaluate sex-related differences in right ventricular (RV) function, assessed with cardiac magnetic resonance imaging, in patients with stable non-ischaemic dilated cardiomyopathy. METHODS Prospective multicentre study. We included 71 patients (38 men) and 14 healthy volunteers. RESULTS Mean age was 60.9 ± 12.2 years. Men presented higher levels(More)