Biventricular cardiac pacemakers
Biventricular cardiac pacemakers, also known as cardiac resynchronisation therapy (CRT), refers to surgically implanted devices with one lead in each ventricle. Used mainly in patients with severe cardiac failure not well controlled on maximal medication therapy.
- lead in the right atrium
- lead in the right ventricle
- lead in the coronary sinus vein to pace the left ventricle
When the heart rate drops below a certain predetermined rate, the device generates electrical impulses that stimulate both ventricles to contract simultaneously, thus improving cardiac output.
- 1. Heerey A et al, Cost effectiveness of biventricular pacemakers in heart failure patients, Am J Cardiovasc Drugs. 2006;6(2):129-37.