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"heart beat it isn't beating as fast as the pulses in my arms" - is not feasible...
The other way - pulse rate falling short of heart rate
- is a feature of irregular rhythms, especially atrial fibrillation
Caffeine is one f the most common cause of palpitations...
EKG / HOLTER (24 to 48 hour ambulatory monitoring) / ECHOcardiogram
/ TMT (Treadmill exercise ECG) / LABORATORY work-up – may all be necessary for further assessment and assistance.
The treating doctor may suggest them depending on need, based on his assessment of the situation.
Wishing speedy recovery