Rest/Stress Quantification Of Left Ventricular Dyssynchrony By 3D Gated Blood Pool D-SPECT

Cardiac Resynchronization Therapy (CRT) is an established treatment for patients with advanced heart failure and left ventricular dyssynchrony (LVD). Too many patients do not clinically improve with CRT. New LVD markers other than QRS duration are needed. Study objective : feasibility assessment of rest and real-time stress 3D Blood-Pool Gated SPECT (BPGS) with a new designed cardiac imaging camera (DSPECT, Spectrum Dynamics®, Ceasaria, Israel) to quantify LVD.