What is a biventricular pacemaker?
In a biventricular pacemaker, wires carry pulses to an atrium and both ventricles to coordinate the electrical signals between the ventricles.
When is cardiac resynchronization therapy necessary?
Cardiac resynchronisation therapy (CRT) is generally used in patients with severe heart failure who are experiencing a delay in heart ventricle contractions. When a delay in contractions occurs, the heart is much weaker than it should be and does not pump at its optimal rate. As a result, blood pumps through the body at a much slower rate than it should, increasing the pressure in the heart. At this point, the right and left ventricles are unable to contract at the same time.