An abnormal echocardiogram means the ultrasound images of your heart revealed something outside the expected range, whether that is a weakened pumping muscle, a leaky valve, fluid around the heart, thickened walls, or any number of other structural or functional differences. The word “abnormal” on a report can feel alarming, but it covers an enormous spectrum, from trivial findings that need no treatment to serious conditions requiring prompt intervention. What matters most is the specific abnormality found and how it fits with your symptoms and medical history.
What the Test Actually Shows
An echocardiogram uses sound waves to produce moving images of the heart in real time. The standard version, called a transthoracic echocardiogram, involves pressing a probe against the chest wall. In some situations, particularly when the standard approach cannot get a clear enough picture, a transesophageal echocardiogram may be used instead, where a small probe is guided down the throat to image the heart from behind. For certain structures, the transesophageal approach is substantially more accurate. One study found it correctly classified valve abnormalities in about 96% of cases compared with 70% for the standard chest-wall approach.1PubMed. Comparison of accuracy of transesophageal versus transthoracic echocardiography for the detection of mitral valve prolapse with ruptured chordae tendineae (flail mitral leaflet) For other measurements, such as sizing the aorta, the standard chest approach can be just as reliable.2PubMed Central. Accuracy of transthoracic echocardiography for the measurement of the ascending aorta: comparison with transesophageal echocardiography
The report that comes back describes dozens of measurements and observations. Some of the most common categories of abnormality include reduced pumping strength, impaired filling, thickened walls, valve disease, fluid collections around the heart, and masses or growths inside a chamber. Each of these tells a different story.
Reduced Pumping Strength
The single most-discussed number on an echocardiogram report is the ejection fraction, often abbreviated EF. It represents the percentage of blood the left ventricle squeezes out with each beat. A normal EF is generally considered to be around 55% to 70%. When the report says the EF is reduced, it means the heart muscle is not contracting as forcefully as expected. This is the hallmark of what cardiologists call systolic dysfunction, and it is one of the defining features used to diagnose heart failure, guide treatment after a heart attack, and monitor patients on certain chemotherapy drugs.3Journal of the American College of Cardiology. Ejection Fraction Pros and Cons: JACC State-of-the-Art Review
A mildly reduced EF, say in the low 50s or upper 40s, may not cause any symptoms and sometimes represents a normal variant or a temporary dip from a viral illness. A severely reduced EF below 35% is a more serious finding that usually points to conditions such as cardiomyopathy, longstanding valve disease, or extensive damage from a heart attack. The lower the number, the harder the heart is working to keep up, and the more likely you are to experience symptoms such as fatigue, shortness of breath, and fluid retention.
It is worth knowing that EF is a somewhat blunt instrument. Two people with the same EF can have very different prognoses depending on the underlying cause, the size of the heart chambers, and how well the rest of the cardiovascular system compensates. Newer measurements are filling in some of those gaps, as discussed later in this article.
When the Heart Fills Poorly
Not every heart failure problem involves weak squeezing. In many cases, particularly in older adults and people with high blood pressure or diabetes, the heart muscle becomes stiff and does not relax properly between beats. The EF can look perfectly normal, yet the heart still struggles to fill with blood during the resting phase. This is called diastolic dysfunction, and it exists on a spectrum from mild impaired relaxation (which is extremely common and sometimes clinically insignificant) to full-blown heart failure with preserved ejection fraction.4PubMed Central. Echo for diastology
When an echocardiogram report mentions abnormal diastolic function, the key question is whether it is producing symptoms. Many people over 60 have some degree of impaired relaxation without feeling anything. But if you have unexplained shortness of breath and the echo shows elevated filling pressures with a normal EF, diastolic dysfunction may be the culprit. Your doctor will typically use the echo findings alongside blood tests and your symptom profile to decide whether treatment is warranted.
Thickened Heart Walls
An echocardiogram might report that the walls of the heart, particularly the left ventricle, are thicker than normal. The most common cause by far is longstanding high blood pressure, which forces the heart muscle to bulk up over time. But wall thickening can also point to a group of conditions called cardiomyopathies that are caused by genetic mutations or infiltrative diseases. A large study of 600 patients with hypertrophic cardiomyopathy found that the ventricular septum, the wall dividing the two lower chambers, was the most frequently thickened region, involved in 96% of cases.5Journal of the American College of Cardiology. Phenotypic spectrum and patterns of left ventricular hypertrophy in hypertrophic cardiomyopathy: Morphologic observations and significance as assessed by two-dimensional echocardiography in 600 patients Wall thickness in that study ranged from 15 mm up to a striking 52 mm.
Distinguishing between thickening caused by blood pressure and thickening caused by an inherent muscle disease matters enormously, because the treatments are completely different. Echocardiographic patterns can help differentiate between these causes. Research has shown that combining measurements like strain ratios and specific scoring systems can correctly classify the cause of the thickening in roughly four out of five cases.6Frontiers in Cardiovascular Medicine. Cardiac “hypertrophy” phenotyping: differentiating aetiologies with increased left ventricular wall thickness on echocardiography When the echo alone cannot settle the question, additional imaging like cardiac MRI is often the next step.
One underappreciated point: regions of the heart wall that are severely thickened tend to contract poorly regardless of the underlying cause. In patients with both hypertrophic cardiomyopathy and hypertensive heart disease, the most thickened segments showed uniformly impaired function, even though the diseases themselves are quite different.7Journal of the American Society of Echocardiography. Evaluation of septal hypertrophy and systolic function in diseases that cause left ventricular hypertrophy: A 3-dimensional echocardiography study So thickening is not just a cosmetic abnormality on the report; it often has direct functional consequences.
Wall Motion Abnormalities and Signs of Heart Attack
One of the most clinically significant things an echocardiogram can detect is a region of heart muscle that does not move normally. When part of the wall contracts weakly, does not contract at all, or bulges outward during a beat, it usually means that region has been injured, most often by a blocked coronary artery. These findings, called regional wall motion abnormalities, are a strong signal that a heart attack has occurred or that blood supply to part of the heart is compromised.
The prognostic weight of these findings is substantial. A large registry study of nearly half a million echocardiograms found that the presence of any wall motion abnormality roughly doubled five-year mortality, increasing it from about 17% to 30% in men and from about 15% to 31% in women.8PubMed Central. Pattern and Prognostic Impact of Regional Wall Motion Abnormalities in 255 697 Men and 236 641 Women Investigated with Echocardiography Among those with wall motion abnormalities, certain patterns carried even worse outcomes, particularly when the affected segments showed no movement at all or when the abnormality involved the apex or the bottom of the heart.
Not all wall motion abnormalities are permanent. In patients with unstable angina, echocardiography can pick up transient abnormalities that come and go with episodes of chest pain. Those that resolve tend to predict a better outcome than those that persist.9PubMed. Identification of transient and persistent segmental wall motion abnormalities in patients with unstable angina by two-dimensional echocardiography This distinction can help doctors decide how aggressively to intervene.
Valve Problems
Heart valves open and close with every heartbeat to keep blood flowing in the right direction. An echocardiogram can reveal two main types of valve trouble: stenosis, where a valve does not open fully and restricts flow, and regurgitation, where a valve does not seal properly and allows blood to leak backward. Both are graded on a severity scale, and the grade matters far more than the mere presence of the finding. Trace or mild regurgitation through one or more valves is so common, especially as people age, that it is often considered a normal variant rather than a disease.
For stenosis, the echo can measure how fast blood accelerates through the narrowed opening and estimate the pressure difference across the valve. These numbers are used to classify the stenosis as mild, moderate, or severe, which directly determines whether you need monitoring alone, medication, or valve replacement.10PubMed Central. Echocardiographic assessment of aortic stenosis: a practical guideline from the British Society of Echocardiography For regurgitation, the echo uses color Doppler imaging to visualize the leaking jet, and additional measurements help quantify how much blood is going the wrong way.11European Heart Journal – Cardiovascular Imaging. Standardization of adult transthoracic echocardiography reporting in agreement with recent chamber quantification, diastolic function, and heart valve disease recommendations
The takeaway for patients: if your echo report mentions a valve abnormality, the first thing to look for is the severity grade. Mild findings usually need nothing more than periodic re-checks. Moderate findings warrant closer monitoring and sometimes further testing. Severe valve disease generally triggers a conversation about intervention.
Fluid Around the Heart
The heart sits inside a thin sac called the pericardium, and a small amount of fluid between the heart and this sac is normal. When an echocardiogram shows more fluid than expected, the report will describe a pericardial effusion and estimate its size. Small effusions are common and often harmless, caused by things like viral infections, inflammation, or post-surgical changes. Larger effusions raise more concern because they can compress the heart chambers and interfere with filling, a dangerous condition called tamponade.
Echocardiography is the primary tool for both detecting effusions and evaluating whether tamponade is developing. The signs of tamponade on echo include collapse of heart chambers during specific phases of the cardiac cycle and characteristic changes in blood flow patterns across the heart valves that shift with breathing.12PubMed Central. Diagnosis and management of pericardial effusion A structured echocardiographic assessment looks at the quantity and quality of the fluid, whether chambers are collapsing, breathing-related changes in chamber size, the behavior of the large vein that feeds blood back to the heart, and flow patterns through the valves.13PubMed Central. Echocardiographic Evaluation of Pericardial Effusion and Cardiac Tamponade If tamponade is present, draining the fluid becomes urgent.
Masses and Growths Inside the Heart
Sometimes an echocardiogram reveals a mass inside or attached to a heart chamber. This is understandably one of the most frightening findings a patient can hear about. The three main possibilities are a blood clot (thrombus), a tumor, and a vegetation, which is an infected clump of material that forms on a valve in people with endocarditis.14Journal of the American Society of Echocardiography. The Echocardiographic Evaluation of Intracardiac Masses: A Review
Blood clots are the most common type, typically forming in a heart chamber that is not contracting well. These clots carry a risk of breaking loose and causing a stroke, so finding one usually leads to blood-thinning medication. Tumors of the heart are rare; the majority that are found are benign, with the most common being a myxoma, a jelly-like growth that typically attaches to the wall between the upper chambers. Malignant cardiac tumors are extremely uncommon. Vegetations point toward an active infection and require antibiotics, sometimes surgery.
Echocardiography can evaluate the location, attachment, shape, size, and mobility of a mass, all of which help distinguish between these possibilities.15PubMed Central. Cardiac Masses in Echocardiography: A Pragmatic Review That said, the echo is not always definitive, and further imaging such as cardiac MRI or CT may be needed to pin down the diagnosis. It is also worth noting that not every suspicious-looking structure is actually abnormal. Normal anatomical variants and benign structures sometimes mimic masses on echo, and an experienced reader can often tell the difference.
Incidental and Unexpected Findings
An echocardiogram sometimes reveals things nobody was looking for. A study of routine echocardiograms found that extracardiac findings, things spotted outside the heart itself, showed up in about 4% of studies.16PubMed. Extracardiac findings on routine echocardiographic examinations The most common were pleural effusions (fluid around the lungs) on the standard chest-wall approach and atherosclerosis of the descending aorta on the transesophageal approach. In many patients with vascular or liver-related incidental findings, the discovery led to new diagnoses and changed their care.
Even when the echo is ordered for a specific narrow question, significant findings unrelated to that question turn up surprisingly often. One study found that over 35% of echocardiograms ordered simply to rule out a pericardial effusion or look for a clot source contained significant incidental findings, with the rate climbing in older patients.17Journal of the American Society of Echocardiography. Feasibility of “Limited” Echo Imaging: Characterization of Incidental Findings This is one reason cardiologists generally prefer a comprehensive echo study rather than a stripped-down one: you often learn things you did not know you needed to know.
When the Echo Is Not Enough
An echocardiogram is powerful, but it has blind spots. Image quality varies from person to person depending on body size, lung disease, rib anatomy, and positioning. When standard images are not clear enough, microbubble contrast agents can be injected through a vein to dramatically improve visualization. Studies have consistently shown that contrast improves diagnostic accuracy in patients with poor image quality, and in ICU patients it converted 100% of non-diagnostic studies into diagnostic ones in one report.18Chest. Contrast Microbubbles Improve Diagnostic Yield in ICU Patients With Poor Echocardiographic Windows19PubMed Central. Use of contrast agents with echocardiography in patients with suboptimal echocardiography: an evidence-based analysis
Some abnormalities are simply beyond the resolution of ultrasound. Apical hypertrophic cardiomyopathy, for instance, is a form of thickened heart muscle that affects the very tip of the left ventricle and can be invisible on a routine echo. Research has shown that a normal echocardiogram without contrast does not rule out this condition, and cardiac MRI or contrast echo may be needed to make the diagnosis.20PubMed. Detection of apical hypertrophic cardiomyopathy by cardiovascular magnetic resonance in patients with non-diagnostic echocardiography If your doctor suspects a specific condition and the echo comes back normal or inconclusive, additional tests are not unusual and do not necessarily mean something was missed the first time.
Stress echocardiography is another extension of the basic test. By imaging the heart during exercise or after a medication that makes it beat faster, doctors can look for new wall motion abnormalities that appear only when the heart is under strain. This type of study has a sensitivity and specificity of roughly 80% to 85% for detecting coronary artery disease and adds prognostic information beyond what a resting echo or ECG can provide.21PubMed Central. Stress echocardiography
Global Longitudinal Strain and Beyond EF
If you have had an echocardiogram recently, your report may include a measurement called global longitudinal strain, or GLS. This tracks how much the heart muscle fibers shorten during contraction, expressed as a negative percentage (more negative means stronger squeezing). GLS can pick up subtle dysfunction even when EF looks normal, making it a useful early warning sign.
In a general population study, lower GLS independently predicted cardiovascular events and heart failure even after accounting for EF and traditional risk factors.22PubMed Central. Global Longitudinal Strain by Echocardiography Predicts Long-Term Risk of Cardiovascular Morbidity and Mortality in a Low-Risk General Population: The Copenhagen City Heart Study For patients who have already been diagnosed with heart failure, GLS has shown independent prognostic value for predicting worsening of the condition.23The American Journal of Cardiology. Prognostic Relevance of Left ventricular Global Longitudinal Strain in Patients With Heart Failure and Reduced Ejection Fraction And in people whose EF had recovered after an initial heart failure diagnosis, an abnormal GLS predicted future deterioration of pumping function with high sensitivity.24PubMed Central. Abnormal Global Longitudinal Strain Predicts Future Deterioration of Left Ventricular Function in Heart Failure Patients with a Recovered Left Ventricular Ejection Fraction
GLS is increasingly used in oncology to monitor for heart damage from chemotherapy drugs like trastuzumab, where catching subtle changes early can allow dose adjustments before the damage becomes irreversible.25PubMed Central. Fully Automated Echocardiogram Interpretation in Clinical Practice If your report includes a GLS value and you are unsure what it means, ask your cardiologist to explain how it fits with your overall picture. The number is more useful in context than in isolation.
The Right Side of the Heart
Most of the attention on an echocardiogram goes to the left ventricle, the chamber responsible for pumping blood to the body. But the right ventricle matters too, particularly in people with lung disease or pulmonary hypertension. When pressure in the lung arteries rises, the right ventricle has to work harder, and the echo can detect signs of strain: the chamber may dilate, the wall may thicken, and its ability to contract may decline. The relationship between right ventricular function and the pressure it has to pump against, sometimes described as coupling, has proven to be an especially important predictor of outcomes in patients with pulmonary hypertension.26PubMed Central. Echocardiographic evaluation of right ventricular-arterial coupling in pulmonary hypertension
If your echo report mentions right ventricular dilation, elevated estimated pulmonary artery pressures, or reduced right-sided function, those findings deserve a focused conversation with your doctor. Right heart problems can exist in isolation or develop as a consequence of left-sided heart disease, and the treatment approach differs depending on the cause.
How Artificial Intelligence Is Changing Echo Interpretation
Echocardiogram interpretation has traditionally been subjective. Two experienced readers looking at the same images may disagree on the ejection fraction by several percentage points. Artificial intelligence tools are beginning to narrow that gap. One widely cited algorithm, trained on over 10,000 echocardiogram videos, was able to estimate EF with a mean error of about 4 percentage points and detected reduced EF with near-perfect accuracy. When the same patients were scanned repeatedly, the AI’s readings varied less than those of trained human sonographers.27PubMed Central. Artificial Intelligence in Echocardiography: The Time is Now
AI-read echocardiograms are also showing promise for predicting clinical outcomes. In one study, automated measurements of EF and filling pressures performed slightly better than manual readings at predicting which heart failure patients would worsen over the next several years.28European Heart Journal – Digital Health. Echocardiographic measures read by artificial intelligence enable accurate and rapid prediction of the worsening of heart failure AI has also reached expert-level performance in detecting regional wall motion abnormalities across most heart segments, though human experts still had an edge in at least one challenging region.29PubMed Central. Echocardiographic Detection of Regional Wall Motion Abnormalities Using Artificial Intelligence Compared to Human Readers These tools are not replacing cardiologists. They are providing a rapid first read that can flag abnormalities and reduce the variability that has always been part of echo interpretation.