Category Archives: Echocardiography

Myocardial strain and strain rate evaluation by tissue Doppler techniques

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 [..]

Echocardiography

Targeting LV lead for CRT with speckle-tracking echocardiography

Identifying the ideal site for left ventricular (LV) lead placement for cardiac resynchronization therapy (CRT) is a challenge to the operator. Khan FZ and colleagues [Targeted Left Ventricular [..]

Echocardiography, Electrophysiology

Evaluation of diastolic function by tissue Doppler

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 [..]

Echocardiography

Tissue Doppler in myocardial ischemia

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 [..]

Echocardiography

Dobutamine stress echocardiography

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 [..]

Echocardiography

Estimation of left ventricular filling pressures from tissue Doppler

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 [..]

Echocardiography

Stress tissue Doppler imaging (stress echo with tissue Doppler)

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 [..]

Echocardiography

Dual Doppler echocardiography

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 [..]

Echocardiography

Carpentier nomenclature of mitral leaflet scallops

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 [..]

Echocardiography

Merlon sign and square root sign in endomyocardial fibrosis

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 [..]

Echocardiography