Final answer:
Tachycardia is a condition characterized by a heart rate over 100 beats per minute and can be due to physical activity, stress, or underlying medical issues. Treatment focuses on addressing the cause and may involve medication or devices like pacemakers. Arrhythmias in general refer to any irregular heart rhythm, which may require medical interventions.
Step-by-step explanation:
An abnormally rapid heartbeat, with a rate quicker than 100 beats per minute in adults, is known as tachycardia. This condition can be a response to physical demands on the body, such as exercise or emotional stress, but it can also indicate underlying medical conditions like fever, anemia, or hyperthyroidism. In children, a higher heart rate is often normal and not classified as tachycardia. Certain heart disorders, including various types of arrhythmias like atrial fibrillation, can also cause elevated heart rates. When dealing with heart arrhythmias, which are abnormal heart rhythms, interventions such as medications, pacemakers, or an implantable cardioverter-defibrillator (ICD) may be necessary. It's important to identify the cause of tachycardia, as it may require treatment to prevent more serious complications like heart failure or stroke. Arrhythmia that involves a fast heart rate requires medical attention to manage the symptoms, reduce the risk of complications, and normalize the heart rhythm.