🫀 100 Echo Signs Every Cardiologist Should Know
B-BUMP SIGN
📈 A classic M-mode clue to elevated LV filling pressure
🔍 WHAT IS THE B-BUMP?
The B-bump is an abnormal late-diastolic configuration of the mitral valve seen on M-mode echocardiography.
It appears as a small bump or plateau between the A and C points, with the mitral valve remaining partially open before closure.
⏱️ WHEN DOES IT OCCUR?
⚠️ The B-bump is a LATE-DIASTOLIC phenomenon.
It occurs after the A point and before mitral valve closure (C point).
🔍 WHY DOES IT OCCUR?
⬆️ LV end-diastolic pressure ⬇️ Transmitral pressure gradient during late diastole ➡️ Mitral leaflets remain partially open ➡️ Abnormal late-diastolic leaflet motion ➡️ B-bump
❤️ CLINICAL ASSOCIATIONS
The B-bump has been described in:
🔸 Elevated LVEDP
🔸 Reduced LV compliance
🔸 Severe LV systolic dysfunction
🔸 Ischemic cardiomyopathy
🔸 Dilated cardiomyopathy
💡 ECHO PEARL
📈 B-BUMP = LATE-DIASTOLIC MITRAL LEAFLET ABNORMALITY
Forwarded fromEasy ECG Course
September 1, 2026 51 1
