Signs and Symptoms
Symptoms can arise suddenly and may resolve without treatment. Stress, exercise, and emotion can all result in a normal or physiological increase in heart rate, but can also, more rarely, precipitate SVT. Episodes can last from a few minutes to as long as one or two days, sometimes persisting until treated. The rapid heart rate reduces the opportunity for the "pump" to fill between beats decreasing cardiac output and consequently blood pressure. The following symptoms are typical with a rate of 150–270 or more beats per minute:
- Pounding heart
- Shortness of breath
- Chest pain
- Rapid breathing
- Dizziness
- Loss of consciousness (in serious cases)
Read more about this topic: Supraventricular Tachycardia
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