Publications by authors named "Pablo Pazos"

This study investigates ichnoassemblages characterized by spreite trace fossils from the Upper Cretaceous Snow Hill Island Formation on Vega Island, Antarctica. The succession reveals alternating heterolithic beds of sandy siltstones to very fine- to fine-grained sandstones, suggestive of a deltaic depositional setting influenced by fluctuating energy conditions. The dominance of spreite structures, such as Paradictyodora antarctica and Euflabella, suggests the prevalence of a colonization window for deposit- or detritus-feeding activity.

View Article and Find Full Text PDF

A 79-year-old woman, previously surgically treated for mitral and aortic valve replacement, experienced recurrent torrential tricuspid regurgitation after 2 transcatheter edge-to-edge repair procedures. Heart team assessment deemed the patient high risk for redo surgery and excluded transcatheter edge-to-edge repair and orthotopic replacement. The patient was then scheduled for a novel cross-caval device implantation.

View Article and Find Full Text PDF

Bioprosthetic valves are used in aortic valve replacement to avoid lifelong anticoagulation. Bovine pericardial valves have excellent haemodynamics and equivalent freedom from reoperation compared with a porcine bioprosthesis [ 1]. However, early failure (parastent post-cusp tear) can take place due to mechanical stress.

View Article and Find Full Text PDF

Background: Although exercise echocardiography may assess left ventricular (LV) function and LV outflow tract (LVOT) gradients during exercise in patients with hypertrophic cardiomyopathy (HCM), its value for predicting outcomes has not been studied. The aim of this study was to determine whether exercise echocardiography predicts outcomes in patients with HCM.

Methods: LV function and LVOT gradients were evaluated during exercise echocardiography in 239 patients with HCM.

View Article and Find Full Text PDF

Background: Supine bicycle exercise (SBE) echocardiography and treadmill exercise (TME) echocardiography have been used for evaluation of coronary artery disease (CAD). Although peak imaging acquisition has been considered unfeasible with TME, higher sensitivity for the detection of CAD has been recently found with this method compared with post-TME echocardiography. However, peak TME echocardiography has not been previously compared with the more standardized peak SBE echocardiography.

View Article and Find Full Text PDF

FEMI is a federation of 23 private not-for-profit health care organizations across Uruguay. It covers approximately 700 thousand people (20 percent of the Uruguayan population) and owns a tertiary center in Montevideo. Pressure from ongoing national changes in health funding and regulation have pushed FEMI to develop a project, in order to improve efficiency in health care through the use of information and communications technologies.

View Article and Find Full Text PDF

Background: The prognostic value of exercise echocardiography (ExE) in patients with left ventricular systolic dysfunction (LVSD) has not been characterized. We sought to assess the value of ExE for predicting outcome in patients with LVSD and known/suspected coronary artery disease.

Methods: This study is a retrospective analysis of a prospectively collected database of 1,107 patients who underwent treadmill ExE and had resting LVSD (left ventricular ejection fraction <50%).

View Article and Find Full Text PDF

Background: Exercise echocardiography (EE) is recommended for patients with known/suspected coronary artery disease (CAD) and electrocardiogram (ECG) abnormalities. Left ventricular hypertrophy (LVH) is associated with worse outcome and patients with LVH have frequently resting ECG abnormalities. We sought to assess the value of EE for predicting outcome in patients with known/suspected CAD and LVH.

View Article and Find Full Text PDF

Aims: Although peak may have higher sensitivity than post-treadmill exercise echocardiography (EE) for the detection of coronary artery disease (CAD), its prognostic value remains unknown. We sought to assess the relative values of peak and post-EE for predicting outcome in patients with known/suspected CAD.

Methods And Results: We studied 2947 patients who underwent EE.

View Article and Find Full Text PDF

Thrombosis of the ascending aorta is a rare, potentially lethal complication. We report the case of a 56-year-old woman with a massive but subclinic thrombosis of the ascending aorta after two cycles of chemotherapy due to an epidermoid lung carcinoma stage T3 N2 M0. An emergent aortic thrombectomy was performed under deep hypothermic circulatory arrest.

View Article and Find Full Text PDF

Objectives: We hypothesize that the change in the left ventricular (LV) diastolic pattern (DP) may be measured with high reproducibility and correlates with exercise echocardiography (EE) better than the ratio of early LV inflow velocity to early diastolic annulus velocity (E/e' index).

Background: The E/e' index has been related to LV filling pressures but has not been compared with DP.

Methods: We selected 179 consecutive patients who were referred for EE.

View Article and Find Full Text PDF