ANATOMY

Detailed explanation-1: -Pacemakers work only when needed. If your heartbeat is too slow (bradycardia), the pacemaker sends electrical signals to your heart to correct the beat. Some newer pacemakers also have sensors that detect body motion or breathing rate and signal the devices to increase heart rate during exercise, as needed.

Detailed explanation-2: -Key Findings. Without evidence-based guidance, the pacemaker lower rate limit is typically left at 60 beats per minute, which is much lower than the average adult resting heart rate of 71–79 beats per minute based on large cohorts.

Detailed explanation-3: -An impulse can be generated either from the Bundle of His, Bundle Branches or Purkinje Fibres at an intrinsic rate of 20 – 40 bpm.

Detailed explanation-4: -Your sinoatrial node is sometimes called your heart’s natural pacemaker. It sends the electrical impulses that start the heartbeat. The SA node is in the upper part of your heart’s right atrium.