Hello and welcome to Healthcare Magic. Thanks for your query.
which occurs only taking certain postures like sitting is most likely indicative of a non-cardiac cause. Moreover, you don't have any chest pain on exertion, and don't have any medical risk factors for a heart disease
. So, you don't have to be worry about this much. It is most likely due to a muscular pain
or due to a costo-chondritis
(i.e. inflammation of the cartilage in the centre of the rib cage), which usually subsides on its own.
If you are having any associated symptoms such as palpitations, shortness of breath
, dizziness or swelling of the ankles, then you should consult a doctor for a cardiac evaluation.
Dr. Sheeba Stephen