Final answer:
Overdrive suppression is the term used when pacemakers, including Automaticity foci, with higher rates override the slower ones. Automaticity refers to the ability of certain cells in the heart to generate electrical impulses spontaneously. When there are multiple pacemakers in the heart, the pacemaker with the highest rate becomes the dominant pacemaker, dictating the heart's rhythm.
Step-by-step explanation:
Pacemakers, including Automaticity foci, with higher rates override the slower ones - this is called overdrive suppression.
Automaticity refers to the ability of certain cells in the heart, such as the sinoatrial (SA) node, to generate electrical impulses spontaneously. These cells act as the natural pacemakers of the heart, setting the heart's rhythm.
When there are multiple pacemakers in the heart, such as automaticity foci in other areas, the pacemaker with the highest rate will override the slower ones and become the dominant pacemaker, dictating the heart's rhythm. This process is known as overdrive suppression.