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The description lacks details. There is no leading clue to suggest anything definite.
‘Vibration’ may mean twitching of muscle – could be normal at times.
It may mean irregular heart beats – if so, you need ECG (routine / 24-hour monitoring) / Echocardiogram
and so on.
Cancer or blood pressure is not likely to cause this feeling.
As planned, you should see your cardiologist for further assessment and assistance.
Wishing speedy recovery