BACKGROUND AND AIM Rheumatic mitral regurgitation is rather common in developing countries. It usually progresses insidiously, because the heart compensates for increasing regurgitant volume by left-atrial enlargement, causes left-ventricular overload and dysfunction, and yields poor outcome when it becomes severe. Doppler-echocardiographic methods can be used to quantify the severity of mitral...

High altitude acclimatization and adaptation mechanisms have been well clarified, however, high altitude de-adaptation mechanism remains unclear. In this study, we conducted a controlled study on cardiac functions in 96 healthy young male who rapidly entered the high altitude (3700 m) and returned to the plains (1500 m) after 50 days. Ninety eight healthy male who remained at low altitude were ...

BACKGROUND Functional analysis of the right ventricle cannot be reliably evaluated by conventional echocardiography, because of its complex geometry and load dependence of ejection phase indices. The Tei index, dP/dt, and myocardial acceleration during isovolumic contraction are parameters of right ventricular (RV) contractility unaffected by RV geometry. However, the effect of loading conditio...

Elucidating the correlation among tourism, CO2 emissions, and economic growth from a spatiotemporal standpoint is of utmost significance for tourism industry responding to China’s “double-carbon” goal. This study expansively uses bottom-up approach, Theil index, Exploratory Spatial Data Analysis (ESDA), Logarithmic Mean Divisia Index (LMDI) method calculate emissions (TE) at different spatial s...

OBJECTIVES We studied the effect of drug-eluting stent implantation for chronic total coronary occlusion (CTO) on left ventricular volumes and function and assessed the predictive value of magnetic resonance imaging (MRI) performed before revascularization. BACKGROUND The effect of recanalization of CTO on long-term left ventricular function and the value of myocardial viability assessment wi...

Background and Aim: total isovolumic time (t-IVt) and tei index both reflect global left ventricular (LV) dyssynchrony. they have been shown to be sensitive in responding to myocardial revascularization and in predicting clinical outcome in heart failure patients. since most these patients are senior, determining the exact effect of age on such parameters remains mandatory. the aim of this stud...

Limited data are available on the use of more recent echocardiographic parameters in the rabbit. Echocardiographic examination, including conventional echocardiography and tissue Doppler imaging (TDI), was performed on 26 male New Zealand white rabbits under ketamine-midazolam sedation. Particular emphasis was placed on the more recent systolic and diastolic parameters, such as myocardial perfo...