Category Archives: Echocardiography

Deformation of the myocardium on application of a physical stress is termed myocardial strain. It is measured as the change in distance between two points (L) divided by [..]

Conventionally, Doppler evaluation of diastolic function is by assessing the mitral flow velocities in diastole. But this has inherent limitation as being highly dependent on ventricular preload. Tissue [..]

Reduction in myocardial systolic velocity (Sa) can be noted within as short as fifteen seconds of myocardial ischemia. Lowering of both systolic velocities can be seen with ischemia [..]

Initial dobutamine infusion is at low dose: 10 micrograms/kg/min (ten micrograms per kilogram body weight per minute) High dose dobutamine infusion is given at: 20 micrograms/kg/min (twenty micrograms [..]

Estimation of left ventricular filling pressures from tissue Doppler data can be obtained from the correlations obtained from previous simultaneous cardiac catheterization and tissue Doppler studies. The ratio [..]

An important limitation with stress tissue Doppler imaging (stress echo with tissue Doppler) is the technical challenge of acquiring both two dimensional and tissue Doppler echocardiographic information during [..]

Dual Doppler echocardiography is the technique of simultaneously recording Doppler signals of two types. This technique is used for recording left ventricular filling (E wave) and e’ (mitral [..]

Carpentier nomenclature of mitral leaflet scallops is important in assessing the mitral leaflets while planning echo. The scallops can be identified well by trans esophageal echocardiography, preferably in [..]

Merlon sign in endomyocardial fibrosis is characterized by a hypercontractile basal ventricle opposing an obliterated apex. There is a diastolic bulge of the interventricular septum into the left [..]