Hello! Thank you for asking on HCM! Regarding your concern, I would recommend to perform a medical review of your father s medical status by his attending cardiologist. This pain, can be hardly considered normal. After excluding any possible sternotomy complications by a careful local examination, I would recommend a resting ECG, some blood tests (including cardiac enzymes), and a cardiac ultrasound. If suspicions are raised about a possible myocardial ischemia, then some additional tests are necessary (cardiac stress tests, perfusional cardiac imagine tests, even coronary angiography). Meanwhile, a modulation of antihypertensive therapy is necessary, to maintain his blood pressure values under control. Hope to have been helpful to you. Greetings! Dr. Iliri