Final answer:
Cardiac resynchronization therapy with a biventricular pacemaker is used to correct abnormal heart rhythms, particularly in patients with heart failure and left ventricular dyssynchrony, improving the efficiency of the heart's pumping ability.
Step-by-step explanation:
Cardiac resynchronization therapy (CRT) with a biventricular pacemaker is used when a patient's heart rhythm is abnormal, commonly due to conditions like heart failure where there is left ventricular dyssynchrony. It is a type of treatment that requires a cardiologist to implant a device that delivers electrical impulses through leads placed in the right atrium, right ventricle, and on the left ventricle via the coronary sinus. This allows the heart's chambers to beat in a more synchronized manner, improving the efficiency of the heart's ability to pump blood.
These artificial pacemakers are crucial medical devices programmed to regulate heart rhythm when the normal sinus rhythm is interrupted. With sensors that detect body motion and breathing, the pacemaker adjusts the heart rate to meet the body's needs for blood and oxygen, especially during exercise. In some cases, these devices also come with built-in defibrillators. A cardiologist can program these devices to deliver stimulation upon demand or continuously based on an appropriate time constant.