What is a common non-invasive method to assess arterial blood flow?

A common non-invasive method to assess arterial blood flow is pulse volume recording (PVR). This technique measures changes in volume within the extremities, which is indicative of blood flow. By utilizing sensors placed on the skin surface, PVR can detect oscillations in blood flow as the pulse travels through the vessels. This method is particularly useful for evaluating peripheral arterial disease or other vascular conditions, providing valuable information without the need for invasive procedures.

Other methods mentioned, like electrocardiography (ECG), primarily assess the electrical activity of the heart rather than direct blood flow in the arteries. Arteriography involves the use of contrast material and imaging to visualize the arteries, making it an invasive procedure. Endoscopy is typically employed for examining internal organs or cavities and does not assess arterial blood flow. Therefore, pulse volume recording stands out as a safe and effective non-invasive assessment for arterial blood flow.