Paroxysmal supraventricular (atrial) tachycardia is a regular heartbeat, fast (160 to 220 beats per minute) that begins and ends suddenly and originates from tissues other than the heart in the heart chambers.
- Most people experience palpation, shortness of breath, and chest pain.
- Events can often be stopped by maneuvers that stimulate the vagus nerve, which slows the heart rate.
- Sometimes, people are given drugs to stop the event.
Causes
Paroxysmal supraventricular tachycardia probably triggered by a premature heartbeat that repeatedly activates the heart pounding. This repetition, rapid activation may be caused by some abnormality. There may be two electrical lines on the trunk atrioventricular (an arrhythmia called atrioventricular nodal reentrant supraventricular tachycardia). There the possibility of an abnormal electrical pathway between the atria and chambers of the heart (an arrhythmia called atrioventricular reciprocating supraventricular tachycardia). Occur less frequently, the atria can result in abnormalities that sooner or circular impulse (an arrhythmia called true paroxysmal atrial tachycardia).
Symptoms
Fast heart rate tends to begin and end suddenly and may form a few minutes to several hours. It is almost always experienced as an uncomfortable palpitation. It is often combined with other symptoms, such as weakness, mild headache, shortness of breath, and chest pain. Typically, otherwise normal heart. doctor confirms the diagnosis by doing an electrocardiogram (ECG).
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