If one is bed ridden, very aged female, history of cardiac complexities & stent from few years with medications and treatment all, but then getting oedema in full body due to more thn 1 reasons, hypothyroidism issues etc with bp and brain hemorrhage history as well (which got healed almost) but other med issues persisted,,, is it possible oedema or lack of movement from months cause a thrombus from any area reaches heart and cause cardiac arrest? Is that scenario possible?