Echocardiogram Results Explained: What Your Report Actually Means

Cardiology · 4 · March 7, 2026

Your doctor ordered an echocardiogram. A technician put gel on your chest, pressed an ultrasound probe against your ribs for 30-45 minutes, and captured images of your heart in real time. Now you have a report. It's full of abbreviations, measurements, and normal ranges. Most patients have no idea what any of it means. Let's fix that.

Ejection Fraction (EF): The Headline Number

This is the number doctors care about most. Ejection fraction is the percentage of blood pumped out of the left ventricle with each heartbeat. Normal is 55-70%. Mild reduction is 45-54%. Moderate reduction is 35-44%. Severe is below 35%.

An EF below 40% is the definition of heart failure with reduced ejection fraction (HFrEF) and triggers specific medication protocols. An EF below 35% qualifies you for an implantable cardioverter-defibrillator (ICD) in most circumstances. So this number directly affects treatment decisions.

But context matters. If you had a heart attack a week ago and your EF is 38%, it may improve to 45-50% over the next 3-6 months as stunned myocardium recovers. Your cardiologist will repeat the echo to reassess. A single low EF reading doesn't necessarily define your long-term prognosis.

Chamber Sizes: Left Ventricle and Left Atrium

The report lists dimensions for each heart chamber. The left ventricular internal dimension in diastole (LVIDd) tells you whether the left ventricle is dilated. Normal is about 3.5-5.6 cm for men and 3.5-5.2 cm for women. A dilated left ventricle suggests chronic volume overload — from conditions like mitral regurgitation or long-standing heart failure.

Left atrial size matters too. An enlarged left atrium (above 4.0 cm or indexed volume above 34 mL/m2) is associated with atrial fibrillation risk. If your left atrium is dilated, your cardiologist may discuss stroke prevention strategies or monitor you more closely for rhythm disturbances.

Wall Motion: Looking for Damage

The echo assesses how each segment of the left ventricle contracts. Normal motion means the walls thicken and move inward symmetrically. Hypokinesis means reduced movement. Akinesis means no movement. Dyskinesis means the wall bulges outward instead of contracting — this usually indicates scar from a previous heart attack.

If the report says "anteroseptal hypokinesis," that means the front wall of the heart isn't moving well — consistent with a blockage or prior event in the left anterior descending artery. Your cardiologist correlates wall motion abnormalities with specific coronary territories to guide further workup.

Valve Function: Regurgitation and Stenosis

The echo evaluates all four heart valves: mitral, aortic, tricuspid, and pulmonary. Two things can go wrong. Regurgitation (leaking) means blood flows backward through a valve that doesn't close properly. Stenosis means a valve doesn't open fully, obstructing blood flow.

Trace or mild regurgitation across the mitral and tricuspid valves is extremely common and almost always benign — present in 70-80% of normal echos. Don't panic if you see "trace mitral regurgitation." Moderate or severe regurgitation is different — it may require monitoring, medication, or surgical intervention depending on the valve and symptoms.

Aortic stenosis is the most common valve disease requiring intervention in older adults. Grading is based on valve area (severe = below 1.0 cm2), mean gradient (severe = above 40 mmHg), and peak velocity (severe = above 4.0 m/s). If your echo shows moderate or severe aortic stenosis, you'll need serial monitoring and likely eventual valve replacement — either surgical or transcatheter (TAVR).

Diastolic Function: The Stiffness Grade

This section confuses almost everyone. Diastolic function describes how well the heart relaxes and fills. It's graded: normal, Grade I (impaired relaxation — mild and very common over age 60), Grade II (pseudonormal — moderate diastolic dysfunction), and Grade III (restrictive — severe). The E/A ratio and E/e' ratio are the key measurements. An E/e' above 14 suggests elevated filling pressures — meaning the heart is stiff and the left atrium is working harder than it should.

Key Takeaways

- Ejection fraction (EF) is the most important number — normal is 55-70%, below 40% defines systolic heart failure

- Trace mitral or tricuspid regurgitation is normal in 70-80% of adults — don't worry about it

- Wall motion abnormalities (hypokinesis, akinesis) point to specific coronary artery territories and prior damage

- Enlarged left atrium signals elevated AFib risk and possible diastolic dysfunction

- Ask your cardiologist to explain your specific report — numbers without context can cause unnecessary anxiety

Keep all your cardiac imaging results organized and track trends over time with our Smart Journey health records portal.