What does “Mild cardiomegaly” mean on a radiology report?
The heart’s outline on the image looks slightly larger than the usual range — which may reflect a real enlargement, or simply how the picture was taken.
Got the rest of your report in front of you?
Paste it here and we'll explain every term and phrase we recognise, in plain English. Free, and it's checked on your device: nothing you paste is sent or saved.
General explanations of common wording, not advice about your own scan. Ask the doctor who ordered it what your results mean for you.
Why the radiologist wrote it that way
"Cardiomegaly" means an enlarged heart; "mild" grades it as slightly over the line. On a chest X-ray the radiologist judges heart size by comparing the width of the heart shadow with the width of the chest. That comparison is affected by technique: a film taken from front to back (as is usual for patients lying in bed or in a hurry) magnifies the heart, and a shallow breath makes it look broader. Fat around the heart and fluid in the sac around it also widen the shadow.
Is this good or bad news?
An X-ray shows the heart’s silhouette, not how well it pumps. Mild cardiomegaly on an X-ray is a prompt to interpret the image alongside your history and blood pressure, and, if your doctor thinks it worthwhile, to look properly with an echocardiogram — an ultrasound of the heart that measures the chambers and function directly. Many people with mildly enlarged heart shadows on an X-ray have normal hearts on echo; others have a known cause such as long-standing high blood pressure that their doctor is already managing.
What it does not mean
- That you have heart failure. An X-ray cannot diagnose that on its own.
- That your heart is weak. Size on an X-ray says nothing direct about pumping strength.
- That the measurement is exact. Positioning and breathing alone can shift it across the line.
Where you will see it
Words in this phrase
One phrase is not the whole report
What this sentence means for you depends on everything else your report says. Radily reads the whole thing and explains it in plain English — and can talk you through it on video, so you are not reading medical language alone.
Other phrases on your report
- Cannot be excludedThe images are not able to completely rule this out — which is a statement about the limits of the scan, not a suggestion that it is likely.
- NonspecificThe finding is real, but its appearance is not distinctive enough to say what is causing it.
- Small pleural effusionA small amount of fluid has collected in the space between the lung and the chest wall.
- Hepatic steatosisFat has built up in the liver — commonly called fatty liver.
This explains how a phrase is commonly used in radiology reports. It is not a diagnosis, not a reading of your scan, and not medical advice. Only your doctor can tell you what your own report means.