What Are the Different Types of Abnormal Electrocardiograms (ECGs)?

An abnormal electrocardiogram (ECG) may indicate numerous conditions, such as cardiac arrhythmias or conduction abnormalities; it may also reflect ST–T wave changes, which play a critical role in diagnosing heart disease. If you experience palpitations or a sensation of rapid heartbeat, further relevant examinations—including complete blood count (CBC), ECG, chest X-ray, echocardiography, carotid artery ultrasound, and 24-hour Holter monitoring—should be performed to establish a definitive diagnosis and guide targeted treatment.