What Heart Rate Is Considered Tachycardia

For a healthy adult, the normal resting heart rate typically ranges between 60 and 100 beats per minute. If the heart rate exceeds 100 beats per minute at rest, it is generally classified as tachycardia. In the context of a 24-hour Holter monitor test, an average heart rate above 85 beats per minute throughout the day may also be considered tachycardia. This condition can often occur in response to normal physiological states, such as after physical exercise, watching an intense or thrilling movie, or experiencing emotional excitement. Stress and anxiety are also common triggers for a temporary increase in heart rate.

Common Non-Cardiac Causes of Tachycardia

Tachycardia can appear in certain population groups more frequently, such as women going through menopause or individuals suffering from insomnia. These cases are often linked to autonomic nervous system dysfunction, increased sympathetic nervous system activity, or reduced vagal tone. In such situations, the heart rate may elevate without any underlying heart disease being present.

When Tachycardia Indicates a Serious Condition

Heart Diseases Associated With Tachycardia

Tachycardia can also be a symptom of structural or organic heart disease, which typically has more serious implications. Conditions such as rheumatic heart disease that lead to valve damage can cause rapid atrial fibrillation. Other heart-related causes include congenital heart defects, coronary artery disease, pulmonary heart disease, cardiomyopathy, and myocarditis. When tachycardia is caused by such underlying heart conditions, it usually indicates a more severe health issue and often comes with a less favorable prognosis.