BACKGROUND No gold standard currently exists for quantification of mitral regurgitation (MR) severity. Classification by echocardiography is based on integrative criteria using color and spectral Doppler and anatomic measurements. We hypothesized that a simple Doppler left ventricular early inflow-outflow index (LVEIO), based on flow velocity into the left ventricle (LV) in diastole and ejected...

The eustachian valve directs oxygen-rich blood from the inferior vena cava toward the foramen ovale and away from the tricuspid valve during fetal development. Ordinarily, it does not prevent reflux of right atrial blood back into the inferior vena cava because it does not function as a true valve. Here we describe an unusual adult patient with severe tricuspid valve regurgitation in whom the e...

Three patients with normal hearts and no pulmonary abnormality had neonatal tricuspid regurgitation causing cardiorespiratory distress and cyanosis. The signs of tricuspid regurgitation resolved over a few weeks. In the acute phase echocardiography showed gross dilatation of the right atrium and ventricle. The interatrial septum bulged into the left atrium during the whole cardiac cycle. Dopple...

The regurgitant flow fields of clinically used mechanical heart valves have been traditionally studied in vitro using flow visualization, ultrasound techniques, and laser Doppler velocimetry under steady and pulsatile flow. Detailed investigation of the forward and regurgitant flow fields of these valves can elucidate a valve's propensity for blood element damage, thrombus formation, or cavitat...

BACKGROUND Mitral regurgitation (MR) of mitral valve prolapse predominates in late systole but may be holosystolic or purely mid-late systolic, but the impact of MR timing on MR left ventricular and left atrial consequences and outcome is unknown. Whether effective regurgitant orifice (ERO) by the flow convergence method is similarly linked to outcome in mid-late systolic MR and holosystolic MR...

Background—Mitral regurgitation (MR) of mitral valve prolapse predominates in late systole but may be holosystolic or purely mid-late systolic, but the impact of MR timing on MR left ventricular and left atrial consequences and outcome is unknown. Whether effective regurgitant orifice (ERO) by the flow convergence method is similarly linked to outcome in mid-late systolic MR and holosystolic MR...

AIM The aim of this study was to show technical principles and feasibility of transcatheter tricuspid valve repair by use of the MitraClip system. METHODS AND RESULTS Three consecutive patients were treated successfully for severe symptomatic Tricuspid regurgitation. Three-dimensional transoesophageal echocardiography confirmed reduction of measured effective regurgitant orifice in all patien...

Pulsed Doppler mapping of the flow disturbance of mitral insufficiency is commonly employed to estimate the severity of regurgitation. We re-examined the customary pulsed Doppler criterion of relative depth of jet penetration (MR ratio) in 50 patients undergoing left ventriculography and found a modest correlation (r = 0.70) between Doppler and angiographic estimates of regurgitant grade. The M...

designing and manufacturing the multiple jets simulator and experimental investigation of the multiple jets in crossflow at low velocity ratios have been studied together with design and build a low-speed wind tunnel. a specific rake is used to determine the flow field pressure and changes in static pressure measured by pressure taps in the near field of the jets. there are generally three regi...

T he prevalence of valve regurgitation in healthy people has been previously examined by echocardiography. Pulmonary regurgitation or tricuspid regurgitation (TR) was common, mitral regurgitation (MR) was less common, and aortic regurgitation was generally undetectable. In addition, the prevalence of regurgitant signals varies with age or sex. Assuming that a low prevalence of regurgitant signa...