Can Aromatherapy Help Relieve Palpitations?

It is important to stress that with a condition such as palpitations (tachycardia) that you seek medical advice, since any heart condition should be taken seriously.
However, once medical advice has been sought, then you can use aromatherapy  to assist.
The best oil for this condition is said to be ylang ylang.  You should try adding a few drops of ylang ylang to a bath and relax in the bath for 10-15 minutes.  You could also make a massage oil whereby you take a good quality carrier oil and mix in a few drops of ylang ylang and perhaps some neroli and lavender to help promote relaxation.
If you can, have someone rub the prepared oil into your body, particularly over your back and shoulders, to help you to relax.  If you don't have anyone to help with this, you can still massage in the oil yourself, paying particular attention to your pulse points (temples and wrists).