“Will I have more energy after a heart stent?”

Patients with a high-grade blockage(es) in their heart vessels can experience various symptoms, especially with exertion, including easy fatiguability, dyspnea, chest discomfort, etc. Frequently, those symptoms can significantly improve or completely resolve with medical therapy and/or after fixing the blockage by opening up the vessel by deploying a coronary stent.

If the blockage in the artery is significant and your heart is not getting enough oxygen when the demand for oxygen increases, you should not feel the symptoms you are feeling now if they are due to the blockage which is to be stented. In fact, for the vast majority of blockages, that is the main reason for stenting them. Presumably your cardiologist has recommended coronary intervention because he/she believes that whatever your complaints are they will be relieved by opening an obstructed coronary artery with a stent. If you have any doubts regarding this you should seek another opinion. There is a lot of data that shows that stenting a coronary artery in the absence of an acute event does not save lives. It relieves symptoms. So unless you are having an acute or subacute coronary syndrome (severe symptoms related to a blocked artery), you should only have a stent if the blockage or coronary artery stenosis is affecting your quality of life.