In general, if a patient develops pericardial effusion, the pulse pressure difference typically decreases, especially the gap between diastolic and systolic pressures. This is because pericardial effusion can weaken the contractility of the heart chambers, leading to either decreased diastolic pressure or increased systolic pressure, thus reducing the pulse pressure difference. If pericardial effusion is timely addressed and corrected, this condition can improve. Currently, it is recommended that patients actively monitor changes in blood pressure. If there is a history of hypertension, it is necessary to actively use antihypertensive medications to treat and control this condition.