As an individual ages, changes in the heart and blood vessels are expected, which can alter EKG readings over time. These changes are part of the natural aging process and not all changes should cause concern.  However, some changes may result from adverse health or lifestyle factors or underlying chronic conditions that will require treatment. It's common for older individuals to exhibit differences in their EKG readings compared to when they were younger, due to factors like a slightly lower heart rate, the natural pacemaker of the heart losing some of its cells, or thickening of the heart walls. Although these changes might indicate a change in heart health, they are not necessarily a cause for alarm but should be monitored.