Brief Answer:
Both options are there

Detailed Answer:

Hi,

Both the options are there, but at present it's preferable to stay with cardizem only if you have not taken propafenone previously in the hospital.
Actually, there are two ways of dealing with a fib, one is to have cardizem and control your heart rate and other is to have propafenone for returning to normal rhythm. If you have cardizem then you'll be in atrial fibrillation, but rate will be controlled and it will not help in maintaining you in sinus rhythm.

So overall, considering you are having intermittent atrial fibrillation, I would advise for propafenone which will keep you sinus rhythm. But, precautions, propafenone should be taken for first in hospital to monitor side effects and ecg and also your heart function should be normal for this medicine to have. So if this fulfils the requirement then you may have it. Otherwise, it's better to continue with cardizem which is safe and has less side effects. But, you may need to take it frequently.

Next thing, you may it together as well, but heart rate needs to be monitored and should not go down. So it's always better to have it once in hospital to monitor side effects like heart block.

Hope this helps you and get back if you have any doubts.

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