How long to rest for heart balloon dilatation is related to the severity of the disease, patients with stable coronary artery disease can rest for one or two days, and patients with myocardial infarction need to rest for 3~6 months. Cardiac balloon dilatation is mainly used for the treatment of severe coronary artery disease, and after balloon dilatation, stenting or medication is needed, which is the preparatory work before cardiac stenting. Through balloon dilatation, plaque or calcification can be loosened, which is conducive to the implantation of stents, and post-stenting dilatation is also needed after stenting to make the stent stick to the wall well. Patients with common coronary artery disease can return to normal after resting for 1~2 days after balloon dilatation; some patients may have acute myocardial infarction, patients with different degrees of necrosis of the myocardium, and the rest time after balloon dilatation is longer, which may take 3~6 months, and some patients may have a longer rest time. Patients after balloon dilatation should be actively treated under the guidance of physicians, regular follow-up, and return to normal at an early date.