I think you require a cardiologists intervention, as you are having intermittent attacks of tachycardia
coupled with arrhythmia
. You may require some anti arrhythmic drugs to keep your heart rate
normal and also to avoid further attacks.
Till that time you are advised not to use bath tub etc for bathing and also advised not to drive vehicles, to prevent mishaps.
hope my info helped you
Dr Hari Om Chandrakar