Thanks for writing in.
I am a qualified and certified cardiologist and I read your mail with diligence. You have to be aware that human heart beats for about 100,000 times a day (72 x 60 x 24); a small percentage of them can be normally missing. Some people are perceptive of this. They have the symptom of missed beat. What concerns me is your anxiety
about punching sensation. My suggestion is to take an appointment with a medical specialist. Explain this symptom to the doctor. If after thorough medical examination the doctor is convinced, an holter examination will be done in which EKG is recorded while you are doing your normal work for a day. Results are analysed with help of a computer. That will confirm your assertion that arrhythmia
or heart beating out of rhythm is responsible for thumping sensation. Treatment shall be initiated for the type of arrhythmia. Good Luck.
Dr Anil Grover