Hello. Thank you for your question and welcome to HCM. I understand your concern. Stent placement is a process that begins and ends at the moment that the stent is placed in the coronary artery. It is deployed against the innermost layer of the coronary artery and gradually becomes a part of the human body. Of course, there always is a possibility of acute and chronic, gradual within stent narrowing or total blockage. Should this happen, one would experience severe chest pain, mimicking those of myocardial infarction and all the symptomatology of it, and there would be significant changes in EKG, also mimicking those that are caused by a myocardial infarction. Therefore, my opinion is that this is not the case. Sometimes, in the acute phases after stent placement in a previously and acutely occluded coronary artery, mild arrhythmic phenomena can be registered, as a result of revascularization (restoring the blood flow to an area that was suffering for it). These beats, or premature ventricular beats, are generally benign, and almost always benign in a heart that is not structurally damage. But, in a heart that has suffered severe cell injury and permanent damage with scar replacement, such as that that happens during myocardial infarction, these extrasystoles (heart skipping a beat) have a possibility to trigger ventricular arrhythmias, like ventricular tachycardia or ventricular fibrillation. I would recommend you to discuss with his attending cardiologist, about the possibility of adding a beta-blocker or an antiarrhythmic, such as amiodarone, if beta-blocker is counterindicated, to his therapy. Discuss further with him, about the dosage and frequency of usage. I hope I was helpful with my answer. Take care. My regards, Dr. Meriton