Hello doctor few months ago I got lower back head pulsating pressure accompanied with palpitations. One day I got sudden palipitation and I took ecg it showed sinus tachycardia also I did 2d echo test and it was normal. After a week later I took another ecg and it was normal. Now I'm using beta blockers ( betacap tr20mg ).also I feel weird sensation in upper back of head and neck like pounding pressure. Like electric sensation . when I worry..so I consulted neurologist and doctor prescribed nexito plus medicine. And told it was anxiety related. But while I'm stopping taking beta blocker for 2 days I'm feeling little palipitation like feeling while I move. What is the cause ? Is this anything heart related? Pls let me know