Kerley B Lines Indicate May 2026

Kerley B lines are small, thin, horizontal lines most often seen in the peripheral lung fields, particularly near the costophrenic angles. They are a hallmark radiographic finding on a standard chest X-ray.

Kerley B lines represent thickening of the interlobular septa—the fine connective tissue partitions between the secondary pulmonary lobules. Normally invisible on X-ray, these septa become apparent when distended or infiltrated by fluid, cells, or fibrous tissue. kerley b lines indicate

When a radiologist reports Kerley B lines in an acute setting, think . They are a reliable and early indicator of elevated left atrial pressure (usually > 15–20 mmHg). Their presence should prompt clinical evaluation for jugular venous distension, crackles on auscultation, S3 gallop, and measurement of brain natriuretic peptide (BNP) or echocardiography. Kerley B lines are small, thin, horizontal lines

Here’s a concise, informative write-up about Kerley B lines and their clinical significance: Normally invisible on X-ray, these septa become apparent