Tachycardia

Definition

Tachycardia is a condition characterized by an abnormally fast heart rate, typically defined as a heart rate exceeding 100 beats per minute in adults. It can be caused by various factors including stress, fever, anemia, and electrolyte imbalances.

5 Must Know Facts For Your Next Test

1. Tachycardia can result from nutritional deficiencies such as iron deficiency anemia which impacts oxygen transport in the blood.
2. Electrolyte imbalances, particularly involving potassium and magnesium, can contribute to tachycardia.
3. Dehydration can lead to tachycardia because it reduces blood volume and increases heart rate to maintain blood pressure.
4. Caffeine and certain medications can induce tachycardia by stimulating the sympathetic nervous system.
5. A well-balanced diet that ensures adequate intake of essential nutrients supports overall cardiovascular health and may help prevent episodes of tachycardia.

Review Questions

• What nutritional deficiency is commonly associated with tachycardia?
• How do electrolyte imbalances influence the occurrence of tachycardia?
• Why might dehydration lead to an increased heart rate?

Related terms

Anemia:

A condition where there is a lack of red blood cells or hemoglobin in the blood, leading to reduced oxygen transport.

Electrolyte Imbalance: A disruption in the balance of minerals in the body that can impact various bodily functions including heart rhythm.

Dehydration:

A state where the body loses more fluids than it takes in, affecting normal physiological functions and potentially leading to increased heart rate.