Hypertension is not a contraindication to cardiac coronary angiography, which means that patients with hypertension can undergo cardiac angiography, provided that their blood pressure is properly controlled. If high pressure, i.e., systolic blood pressure exceeds 200 mmHg; low pressure, i.e., diastolic blood pressure exceeds 110 mmHg, there is a risk of cardiovascular accident if cardiac coronary angiography is performed at this time. It is safe to control the blood pressure below 160/100mmHg first, preferably to the normal range of 140/90mmHg, before performing cardiac angiography. Cardiac coronary angiography can clarify and identify the specific vascular condition of the heart’s coronary arteries and intervene if necessary, such as balloon dilation or stent placement. Interventional treatment can effectively relieve angina, improve prognosis, and improve survival.