Search results for "Cardiology"

Synchronization index for quantifying nonlinear causal coupling between RR interval and systolic arterial pressure after myocardial infarction

2002

The analysis of nonlinear couplings among cardiovascular variability series can improve the knowledge of the cardioregulatory mechanism and help to understand how it can be affected by pathologies. In this study, the influences of acute myocardial infarction (AMI) on the causal relationships between the heart period and the arterial pressure were investigated by a nonlinear dynamic approach based on the corrected cross-conditional entropy. Whereas the global synchronization index did not differentiate the post-AMI patients from the young and old control groups, the causal indexes evidenced the impairment of the baroreflex control and showed an increase of the mechanical driving of the RR in…

Dominant frequency and complexity of electrical reentrant activation during ventricular fibrillation with releasing of NO after acute local stretchin…

2013

Improvements in the diagnosis and surgical management of lesions in and around the orbit

1977

Ranolazine induced modifications of ventricular fibrillation activation complexity under mechanical stretch

2013

Effect of Streptomycin on Stretch-Induced Change in Myocardial Activation During Ventricular Fibrillation

2008

The aim of this study was to determine whether the changes in myocardial activation pattern resulting from acute stretching during ventricular fibrillation can be counteracted by administering a compound that blocks receptors sensitive to stretch. The study involved 16 isolated rabbit hearts, in which refractoriness and activation frequency during ventricular fibrillation were measured before, during and after localized acute stretching of the left ventricular free wall, either without (series A, n=8) or with (series B, n=8) the presence of streptomycin, 200 micromol. At baseline and during and after stretching, ventricular fibrillation was slower with streptomycin perfusion in series B tha…

Altered atrial restitution dynamics and refractoriness in metabolic syndrome due to up-regulation of potassium repolarizing currents increases suscep…

2021

Abstract Background Metabolic alterations, such as Metabolic Syndrome (MS), describe an association of factors including diabetes, hypertension, obesity and dyslipidemia, linked to higher risk and prevalence of overall cardiovascular disease, arrhythmogenesis and sudden cardiac death. Obese and diabetic patients have shown an increased risk for developing atrial fibrillation (AF). However, underlying mechanisms are not understood. Purpose To study the effects of MS and obesity remodeling in atrial restitution dynamics, frequency-dependent adaptation, refractoriness and its potential susceptibility to AF. Methods Electrophysiological experimental data from High-fat (HF-O, standard rabbit cho…

Effects of Antihypertensive Treatment on Peripheral Flow of the Lower Limbs

1984

The clinical pattern determined in subjects that undergo a high and prolonged pressure regime is defined as “hypertensive disease”.

Hiatal herniation of the stomach and pancreas in a patient with oxygen desaturations

2013

Hiatal hernia (HH), a neglected cause of cardiorespiratory symptoms, is a frequent entity characterized by the displacement of the gastro- esophageal junction and part of the stomach into the mediastinum. Although often asymptomatic, HH may also exert a wide spectrum of clinical presentations due to cardio-pulmonary compression, including acute cardiovascular events such as arrhythmias, post-prandial syncope, angina-like chest pain, recurrent acute heart failure, hemodynamic collapse, electrocardiographic changes (T-wave inversion, ST elevation) simulating myocardial ischemia or pericarditis, and respiratory manifestations that can range from exercise intolerance and dyspnea on exertion to …

Evaluation of automated hematologic VCS parameters in severe sepsis and septic shock: a case-control study.

2010

A cheap and quick hematologic diagnostic parameter for detection of sepsis would have both economic and therapeutic benefits. The Coulter LH series hematology analyzer uses the VCS technology (Volume, Conductivity, Laser Scatter) providing information about cell volume, size, internal structure, and surface morphology. Many authors analyzed the clinical usefulness of VCS parameters in reactive neutrophils for detection of sepsis. An increase in mean cell volume and a decrease in mean light scatter in septic patients have been described. Our aim is to verify the correlation between VCS parameters and sepsis.

Endovascular thrombectomy with the AngioJet System for the treatment of intermediate-risk acute pulmonary embolism: a case report of two patients

2016

Acute pulmonary embolism (PE) is one of the leading causes of death and ranks third, after myocardial infarction and cerebral stroke, among fatal hospital-related cardiovascular events [1–3]. Mortality associated with PE can be lowered by early treatments aimed at restoring patency of occluded pulmonary arteries (PAs). Although systemic thrombolysis remains the recommended management of PE [4], recent advances in endovascular techniques, especially of rheolytic thrombectomy, suggest that the endovascular approach can represent an alternative therapeutic strategy [5–9]. Here we describe endovascular treatment of two patients with acute PE. We used the AngioJet (Boston Scientific, Natick, MA,…