Hi i dr i have questions actually sometimes my pulse rate increase few minutes it happens for that I am taking betablocker after betablocker now i don't feel pounding sensation if it happens but after few months i feel sudden pounding sensation dhak dhak in chest pulse rate measure that time it was 132 bpm but before it never has happened its nsvt or what I read in Google there is problem called nsvt 5-6 second i feel dhak dhak or its short run pac or artial tachycardia