TACHYCARDIA
Tachycardia is a heart rate of greater than 100 beats per minute. When the heart beats too quickly, there is a shortened relaxation phase. This causes two main problems: the ventricles are unable to fill completely, causing cardiac output to decrease; and the coronary arteries receive less blood, causing supply to the heart to decrease.
- Tachycardia is classified as stable or unstable.
- Heart rates greater than or equal to 150 beats per minute usually cause symptoms.
- Unstable tachycardia always requires prompt attention.
- Stable tachycardia can become unstable.
SYMPTOMS OF TACHYCARDIA
- Hypotension
- Sweating
- Pulmonary edema/congestion
- Jugular venous distension