Tachycardia意思
"Tachycardia" is a medical term that refers to an abnormally fast heart rate. In humans, it typically means a heart rate that exceeds the normal resting rate, which is around 60 to 100 beats per minute (bpm) in adults. Tachycardia can be a sign of various medical conditions and can range from a relatively mild issue to a life-threatening emergency, depending on the underlying cause and the individual's overall health.
There are several types of tachycardia, including:
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Sinus tachycardia: This is the most common type and is usually a response to physical stress, such as exercise or emotional stress. It can also be a normal response to low blood pressure or low blood oxygen levels.
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Atrial tachycardia: This occurs when the heart's upper chambers (atria) beat too fast. It can be caused by heart disease, high blood pressure, or other conditions.
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Ventricular tachycardia: This is a more serious condition where the heart's lower chambers (ventricles) beat too fast. It can lead to cardiac arrest and is a medical emergency.
Tachycardia can be diagnosed through a physical examination, an electrocardiogram (ECG), or other heart monitoring tests. Treatment depends on the type and severity of the tachycardia and may include medications, electrical cardioversion, or, in some cases, surgery.