From your holter study, it states that you have occassional supraventricular tachycardia (SVT). This is transient, but sometimes it can prolong for longer duration. SVT is episode of abnormally rapid heart rhythm originating above the ventricles, typically beating at 150 to 250 beats per minute. Caused by faulty electrical signaling, it triggers sudden palpitations, chest fluttering, and dizziness. Mild episodes can often be stopped using vagal maneuvers, while persistent cases may require medical intervention.
Medicine slowing heart rate may be prescribed for transient attacks. But if SVT is persistent, you need to go to hospital immediately, they will give chemical cardioversion ( with medicine named adenosine - only acts for 30 to 40 seconds only)..if this fails electric cardioversion.
Permanent treatment is catheter ablation of abberent or extra path of signal that is causing SVT
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consult a cardiologist and take an opinion