What Causes a Rapid Heartbeat?

In adults, a heart rate exceeding 100 beats per minute (bpm) is termed tachycardia. Tachycardia can be classified as either physiological or pathological. Physiological tachycardia is very common; numerous factors influence heart rate—including changes in body position, physical exertion, digestion, emotional anxiety, pregnancy, excitement, fear, agitation, alcohol consumption, smoking, and tea intake—all of which may cause an increase in heart rate. Additionally, age is a contributing factor, as children typically have higher resting heart rates than adults. Below, we address this question in detail.

Why does the heart beat faster?

1. Physiological tachycardia

Physiological tachycardia usually resolves spontaneously after a short period. Common triggers include excessive physical exertion, significant emotional fluctuations, acute stress, or sudden fright—all of which readily induce transient increases in heart rate. Typically, heart rate returns to normal within minutes to hours.

2. Cardiovascular disease

The risk of cardiovascular disease increases with age. Elderly individuals are particularly prone to “the three highs”—hypertension, hyperlipidemia, and hyperglycemia—common cardiovascular risk factors. Severe blood loss may lead to hypotension or shock, thereby triggering reflexive tachycardia. Acute myocardial infarction is another serious condition frequently associated with rapid heart rate. Given the wide range of potential causes for tachycardia, cardiovascular etiologies warrant particular clinical vigilance.

3. Drug-induced tachycardia

Many medications exert notable effects on cardiac function. Certain drugs may provoke tachycardia as a side effect. As the adage goes, “All medicines carry some toxicity”; thus, pharmacologically active substances may elicit adverse reactions—including tachycardia—especially in individuals with heightened drug sensitivity or intolerance.

Knowledge Extension: What to do if your heart beats too fast

1. Regular self-massage

Research indicates that regular, appropriate self-massage can help lower heart rate. Massaging the hands or feet for approximately one hour daily may reduce average heart rate by about eight beats per minute. Consistent practice over time can effectively alleviate tachycardia symptoms.

2. Omega-3 fish oil supplementation

Experts recommend daily supplementation with approximately 1 gram of fish oil, administered twice weekly. This regimen has been shown to reduce resting heart rate by roughly six beats per minute. The mechanism likely involves modulation of autonomic nervous system activity—particularly enhancement of vagal tone—and improved cardiac neural regulation, thereby offering protective benefits for heart health.

3. Timely urination

Some individuals habitually delay urination, yet bladder distension elevates intravesical pressure and stimulates autonomic nervous activity—potentially provoking tachycardia and even precipitating cardiac events. Prompt voiding helps mitigate such risks and supports cardiovascular stability.

The above outlines common causes and management strategies for tachycardia. We hope this information proves helpful to you.