Strain imaging to predict response to cardiac resynchronization therapy: a systematic comparison of strain parameters using multiple imaging techniques

Identification of wasted energy is a key to predict positive response to cardiac resynchronization therapy: is strain imaging the answer?

Circumferential 2D-strain imaging for the prediction of long term response to cardiac resynchronization therapy

BACKGROUND Cardiac Resynchronization Therapy (CRT) leads to hemodynamic and clinical improvement in heart failure patients. The established methods to evaluate myocardial asynchrony analyze longitudinal and radial myocardial function. This study evaluates the new method of circumferential 2D-strain imaging in the prediction of the long-term response to CRT. METHODS AND RESULTS 38 heart failur...

evaluation of longitudinal right ventricular mechanical dyssynchrony before and early after cardiac resynchronization therapy: a strain imaging study

background: the right ventricular (rv) dyssynchrony has not been studied extensively and the existing literature has established the effect of cardiac resynchronization therapy (crt) on the left ventricular (lv) dyssynchrony, but there is a dearth of data on the effect of crt on the forgotten ventricle . we sought to evaluate the presence of mechanical right ventricular dyssynchrony in patients...

Longitudinal Strain Delay Index by Speckle Tracking Imaging A New Marker of Response to Cardiac Resynchronization Therapy

Background—In heart failure patients with left ventricular dyssynchrony, contractility in delayed segments does not fully contribute to end-systolic function. We quantified this reserve of contraction related to mechanical dyssynchrony to predict response to cardiac resynchronization therapy by the strain delay index, which was defined as the sum of the difference between peak and end-systolic ...

Large response to cardiac resynchronization therapy in a patient with segmental paradoxical systolic expansion identified by strain imaging.

An 84-year-old man with non-ischaemic cardiomyopathy underwent cardiac resynchronization therapy (CRT) based on the presence of drug-refractory heart failure, depressed left ventricular ejection fraction (25%), and wide QRS complex (160 ms). Longitudinal tissue velocity revealed no significant dyssynchrony (23 ms in Yu index and 35 ms in opposing wall delay). However, longitudinal tissue Dopple...