The Doppler effect in Fabry-Perot cavities with suspended mirrors is analyzed. The Doppler shift, which is intrinsically small, accumulates in the cavity and becomes comparable with or greater than the linewidth of the cavity if the cavity's finesse is high or its length is large. As a result, damped oscillations of the cavity field occur when one of the mirrors passes a resonance position. A f...

BACKGROUND Right heart function is the key determinant of symptoms and prognosis in pulmonary hypertension (PH), but the right ventricle has a complex geometry that is challenging to quantify by two-dimensional (2D) echocardiography. A novel 2D echocardiographic technique for right ventricular (RV) quantitation involves knowledge-based reconstruction (KBR), a hybrid of 2D echocardiography-acqui...

"Flatland" is the title of a 120-year-old science fiction story. It describes the life of creatures living in a two-dimensional (2D) Flatland. A superior creature living in the three-dimensional (3D) spaceland, as we do, can easily inspect, for example, the inside of a Flatland house, as well as the content of a flat man's stomach without leaving any trace. Furthermore, the 3D person has supern...

Recently, many interventional centres have adopted intracardiac echocardiography (ICE) in preference to transoesophageal echocardiography to guide percutaneous patent foramen ovale (PFO) closure. ICE obviates the need for general anaesthesia, facilitating earlier hospital discharge, and gives superior imaging capability, particularly of the inferior interatrial septum. 2 The advent of real-time...

To compare the peak global longitudinal myocardial strain (PGLS) and peak segmental longitudinal myocardial strain (PSLS) values by speckle-tracking echocardiography (STE) obtained using two different echocardiography devices. STE is an emerging quantitative ultrasound technique that allows an accurate evaluation of global and segmental myocardial function. However, there is a lack of standardi...

INTRODUCTION AND OBJECTIVES The structural and functional changes observed in the left ventricle in professional soccer players could cause alterations in ventricular rotation (Rv) and ventricular torsion (Tv). Our aim was to characterize the changes in Tv that occur in professional soccer players. METHODS In total, 17 professional soccer players and 10 healthy volunteers who had not undergon...

Doppler echocardiography can provide insight into the diastolic properties of the left ventricle. The hemodynamic origins of the diastolic mitral flow velocity profile are reviewed and Doppler information is compared to other measures of left ventricular diastolic function. Factors affecting the mitral diastolic flow velocity in both normal populations and pathologic conditions are discussed an...

The assessment of regional volumes is an option for analysis of the response of LV segments to interventions such as revascularization or cell therapy. We sought to compare regional volumes from 3D-echocardiography (3DE) with cardiac magnetic resonance (CMR) over follow-up. CMR regional volumes were assessed at baseline and after one year follow-up in 30 unselected patients (28 men, 65 +/- 11 y...

Accurate quantification and timing of regional myocardial function allows early identification of dysfunction, and therefore becomes increasingly important for clinical risk assessment, patient management, and evaluation of therapeutic efficacy. For this purpose, the application of tissue Doppler echocardiography has rapidly increased. However, echocardiography has some major inherent limitatio...