What is an arrhythmia?

An arrhythmia is defined as an abnormal heart rhythm that arises from improper electrical activity within the heart. This condition can manifest in various forms, such as irregular heartbeats, excessively slow or fast heart rates, or skipped beats. The heart operates based on a precise electrical conduction system that dictates its rhythm and rate; when this system is disrupted, it leads to arrhythmias.

Understanding this definition is crucial as it encompasses a wide range of abnormalities, from benign to life-threatening. The nuances of arrhythmias are important in clinical practice, as they guide diagnosis and management. For instance, recognizing that an arrhythmia can arise from various causes, such as structural heart disease or electrolyte imbalances, is vital for effective treatment.

The other options describe different concepts that do not accurately reflect the definition of an arrhythmia; they either relate to normal heart rhythm, specific heart conditions, or heart rates outside the context of abnormal electrical activity. Understanding the accurate definition helps in recognizing and managing potential cardiovascular issues effectively.