The TTE medical abbreviation stands for transthoracic echocardiogram, an ultrasound picture of the heart taken by moving a probe over the outside of the chest. Most people simply call it an echo, and when a cardiologist says a patient needs an echo, a TTE is almost always what they mean.
You will see TTE in cardiology notes, hospital orders, discharge summaries and patient portal results. It is painless, uses sound waves rather than radiation, and gives a moving view of the heart chambers, valves and pumping strength. Read on for the meaning of the letters, what the test involves, how to read the common phrases in a TTE report, and how it differs from its close relative, the TEE.
At a glance
Stands for
Transthoracic echocardiogram (or echocardiography)Word roots
Trans (across) + thoracic (chest) + echo + cardio (heart) + gram (record)Used in
Cardiology, hospital medicine, emergency care, preoperative checksWhat it uses
Ultrasound waves, no radiationDo not confuse with
Written as
TTE, transthoracic echo, echo, 2D echo
What the TTE medical abbreviation means in cardiology
Each part of the name describes the test. Transthoracic means across the chest, so the ultrasound beam travels through the skin and ribs from the outside. Echocardiogram means a record of the heart made with sound echoes. Put together, a TTE is the routine, noninvasive heart ultrasound that most patients get first.
Cardiologists order it to answer practical questions. How well does the heart squeeze? Are the valves opening and closing properly? Is any chamber enlarged or any wall thickened? Is there fluid around the heart? Because it is quick and safe, a TTE can be repeated over months or years to track change, for example after a heart attack or in someone with CHF.
What happens during a transthoracic echo
The person lies on an exam table, usually turned onto the left side. A trained sonographer spreads cool gel on the chest and presses a small handheld probe, called a transducer, against several spots: beside the breastbone, under the left breast area, below the ribs and above the collarbone. Small sticky patches connect to a heart rhythm tracing at the same time.
Most studies take about 30 to 60 minutes. There is no needle unless contrast is needed, and there is usually no fasting or other preparation. Some people feel firm pressure from the probe, and the room is kept dim so the screen is easy to see. The images are recorded and a cardiologist reviews them afterward, so the final report may come later than the scan itself.
In a clinic plan: "New murmur on exam. Order TTE to assess valves." Here the doctor heard an extra heart sound and wants the ultrasound to see whether a valve is narrowed or leaking.
Decoding a typical TTE report
Echo reports are full of their own shorthand. The table below translates phrases that patients often find in a portal result.
| Report phrase | Plain meaning |
|---|---|
| LVEF 55 to 60% | Left ventricular ejection fraction: the share of blood the main pumping chamber pushes out with each beat |
| Normal LV size and function | The left ventricle is a usual size and squeezes well |
| Mild MR | Mild mitral regurgitation, a small backward leak through the mitral valve |
| No pericardial effusion | No extra fluid in the sac around the heart |
| Technically difficult study | The images were hard to get, often because of body shape or lung tissue in the way |
Mild valve leaks are common and often normal. An ejection fraction of about 50 to 70 percent is usually described as normal, though each lab writes its own reference ranges. Only your cardiologist can say what your numbers mean for you.
Bubble studies, contrast and stress echo
A plain TTE can be extended in a few ways. In a bubble study, the team shakes a small amount of salt water to make tiny bubbles and injects it into an arm vein. Bubbles that slip from the right heart chambers to the left can point to a PFO, a small flap opening between the upper chambers. A different kind of contrast agent can sharpen the outline of the heart walls when images are hazy.
A stress echo pairs the ultrasound with exercise on a treadmill or a medicine that makes the heart work harder. Images before and after show whether any wall stops moving normally under strain, which can suggest narrowed arteries. Notes may write these as TTE with bubble study, contrast TTE or stress echo.
TTE compared with TEE and other heart tests
The biggest mix up is with TEE, which differs by one letter and a lot of experience for the patient. A TTE stays outside the body. A TEE passes a thin probe through the mouth into the esophagus, right behind the heart, and usually needs sedation.
| Test | How it is done | Main purpose |
|---|---|---|
| TTE | Probe on the chest | First look at structure and pumping |
| TEE | Probe in the esophagus, with sedation | Close detail of valves, clots, infection |
| EKG | Stickers on the skin | Electrical rhythm, not pictures |
| Cardiac MRI | Magnetic scanner | Detailed tissue views when echo is unclear |
Often a TTE is done first, and a TEE follows only if the outside view leaves a question open.
Tips for students charting a TTE
On a problem list or progress note, clinicians usually write the test name, the date reference such as recent or prior, and the headline findings: ejection fraction, any significant valve disease and any effusion. A line like "Prior TTE: EF 35%, moderate MR" gives the next reader the picture in seconds.
Students should not confuse the test with the finding. TTE is the method; EF, MR and effusion are results. Other imaging abbreviations sit nearby in the scans and lab tests section.
An echo report is one piece of a larger picture. Your cardiologist, or whoever ordered the scan, can talk through what your particular findings mean and any next steps.
Frequently asked questions
What does TTE stand for in cardiology?
TTE stands for transthoracic echocardiogram. The test images the heart from outside the chest, and it is the standard first echo for most patients.
Is a TTE the same as an echo?
In everyday speech, yes. When someone says they had an echo, they nearly always mean a transthoracic study. The term TEE is used for the internal version through the esophagus.
Does a TTE hurt?
It is generally painless. The probe is pressed firmly against the chest and the gel feels cool, but there are no needles unless contrast or a bubble study is part of the order.
Is fasting required before a transthoracic echocardiogram?
Usually not. Most people eat and take their medicines as normal, but follow any instructions from the clinic that scheduled your test, since a stress echo or combined procedure can have different rules.
What is the difference between TTE and TEE?
TTE is done on the outside of the chest with no sedation. TEE places a probe in the esophagus behind the heart for clearer images and usually needs sedation and fasting beforehand.