India, May 25 -- Does your heart sometimes behave erratically? A sudden flutter, a racing pulse, or an unusually loud heartbeat, even when you are not doing any strenuous activity and simply sitting, can feel deeply unsettling and anxiety-inducing. Many people do not think much of it and dismiss it as stress, fatigue or too much coffee. But subtle changes in the heart should not be ignored.ALSO READ: Can excessive training enlarge your heart? Cardiologist warns of silent condition called athlete's heart

In some cases, these irregular beats may point to arrhythmia, a condition in which the heart beats too fast, too slow or irregularly because of a disruption in its electrical signals. To understand what these unusual heartbeats can mean, ...