CRT

Cardiac resynchronisation therapy (also known as biventricular pacing): aims to improve the heart’s pumping efficiency by making the chambers of the heart pump together. 25–50% of all heart failure patients have hearts whose walls do not contract simultaneously. CRT involves implanting a CRT pacemaker or ICD with leads positioned to stimulate both ventricles. Most devices also include a third lead positioned in the right atrium to ensure that the atria and ventricles contract at the right times.