What is considered a severe level of hypertension that may warrant renal artery angiography?

The severe level of hypertension that may warrant renal artery angiography is characterized by significantly elevated blood pressure readings, particularly those indicative of end-organ damage or complicating factors in hypertension management. A systolic blood pressure of 180 mmHg or a diastolic pressure of 110 mmHg is generally classified as severe hypertension, and is associated with a higher risk for complications, necessitating further evaluation of potential underlying causes, such as renal artery stenosis.

In this context, renal artery angiography becomes a useful diagnostic tool. It allows for visualization of the renal arteries to assess for narrowing or blockage, which can contribute to the high blood pressure. Patients exhibiting a systolic pressure of 180 mmHg or a diastolic pressure of 110 mmHg are at risk of cardiovascular events and may require this advanced imaging to guide treatment decisions.

Therefore, the correct answer reflecting the severe level of hypertension that could justify renal artery angiography aligns with the threshold of either 180 systolic or 110 diastolic. This is a critical understanding in interventional radiology as it influences management strategies in patients with difficult-to-control hypertension.