The human heart beats nearly 100,000 times a day, powered by a precise electrical system that keeps blood flowing to every part of the body. Most of the time, this rhythm works silently in the background. But when it changes unexpectedly, it can signal that something needs attention. Understanding your heart rate is one of the simplest ways to monitor your heart health.
The heart’s rhythm is controlled by its own electrical network. At its core is the sinoatrial (SA) node, often called the heart’s natural pacemaker. It generates electrical impulses that trigger each heartbeat and ensure the heart’s chambers contract in a coordinated manner. It may temporarily rise during exercise or stress and slow down during rest or sleep. These variations are normal. However, when the heart consistently beats too slowly, too quickly, or irregularly, it may indicate a rhythm disorder. One such condition is bradycardia, where the heart rate falls below 60 beats per minute. While this can be normal for athletes, in many individuals, especially older adults, it may reflect a disruption in the heart’s electrical system.
As people age, the heart’s electrical pathways can undergo natural wear and tear. Changes such as fibrosis or calcification may slow down or block electrical signals. Chronic conditions like diabetes, hypertension, or coronary artery disease can further affect heart rhythm. The challenge is that symptoms are often subtle. Persistent fatigue, dizziness, light-headedness, breathlessness during routine activities, or even confusion may be dismissed as stress or normal ageing. In some cases, unexplained falls or fainting spells may be linked to an undiagnosed rhythm issue. Because these signs can be vague or intermittent, many individuals delay seeking medical advice.
Diagnosing a rhythm disorder begins with awareness. If symptoms occur sporadically, extended monitoring with wearable devices, such as a Holter monitor, may provide greater clarity. Treatment depends on the cause and severity. Sometimes, adjusting medications or addressing underlying conditions may resolve the issue. In cases where bradycardia causes significant symptoms or poses a risk of complications, a pacemaker may be recommended to maintain a steady heartbeat. Advances in cardiac technology have made pacing therapies safer and more patient-friendly. Leadless pacemakers, for instance, are miniature devices implanted directly into the heart through a minimally invasive procedure. By eliminating traditional leads and surgical pockets, they reduce certain risks and improve comfort for eligible patients.
Monitoring your pulse occasionally or using wearable technology can help you understand what is normal for your body.
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