Echocardiography: Contemporary Assessment in Clinical Cardiology

Echocardiography is one of the most important diagnostic tools in contemporary cardiovascular medicine. Its value extends far beyond the measurement of left ventricular ejection fraction. A comprehensive echocardiographic study integrates cardiac anatomy, chamber remodeling, systolic and diastolic function, valvular hemodynamics, right-heart physiology, pulmonary pressures, pericardial disease, aortic pathology and, increasingly, myocardial deformation.

Because it is non-invasive, widely available, repeatable and capable of real-time hemodynamic assessment, echocardiography frequently serves as the first-line imaging modality for patients with suspected or established cardiovascular disease.

The central clinical principle is that echocardiography should not be interpreted as a collection of isolated measurements. The study must answer the clinical question, integrate multiple parameters and translate imaging findings into meaningful cardiovascular decision-making.

The Role of Comprehensive Transthoracic Echocardiography

Transthoracic echocardiography (TTE) is the foundation of cardiovascular ultrasound.

A comprehensive examination can assess:

• cardiac chamber size

• left and right ventricular systolic function

• myocardial wall thickness and remodeling

• diastolic function and filling pressures

• left and right atrial structure

• valvular anatomy and hemodynamics

• pulmonary pressure probability

• pericardial disease

• aortic dimensions

• intracardiac masses or shunts when visible

• hemodynamic consequences of structural heart disease

Cardiac chamber quantification remains fundamental to interpretation, and standardized methodology improves reproducibility and longitudinal comparison. ASE/EACVI recommendations emphasize chamber measurements, ventricular volumes, three-dimensional imaging and myocardial deformation when appropriate.

Left Ventricular Size and Systolic Function

Assessment of the left ventricle remains one of the most frequent reasons for echocardiography.

Evaluation should include:

• LV dimensions

• wall thickness

• geometry and remodeling

• end-diastolic and end-systolic volumes

• regional wall motion

• global systolic performance

Whenever image quality allows, quantitative volumetric assessment is preferable to purely visual estimation.

The biplane method of discs remains an established two-dimensional approach for calculation of ventricular volumes and LVEF, while three-dimensional echocardiography can reduce some geometric assumptions and may improve volumetric assessment when acquisition quality is adequate.

LVEF Is Important — But Not Sufficient

Left ventricular ejection fraction remains a central prognostic and therapeutic variable, but it has important limitations.

LVEF is influenced by:

• loading conditions

• image quality

• endocardial definition

• ventricular geometry

• observer variability

• heart rate and rhythm

• mitral or aortic regurgitation

• acute changes in preload and afterload

A patient may therefore have clinically significant myocardial dysfunction despite a preserved LVEF.

Conversely, an abnormal LVEF should always be interpreted within the broader structural, hemodynamic and clinical context.

Modern echocardiography increasingly combines LVEF with chamber remodeling, diastolic parameters, strain imaging and right-heart assessment rather than treating LVEF as a complete description of cardiac performance.

Global Longitudinal Strain

Global longitudinal strain (GLS) has become an important extension of conventional systolic-function assessment.

Speckle-tracking echocardiography measures myocardial deformation and can identify abnormalities in longitudinal contraction before a clear decline in LVEF becomes apparent.

Potential clinical applications include:

• cardiomyopathies

• cardio-oncology

• heart failure

• valvular heart disease

• cardiac amyloidosis

• selected ischemic syndromes

• serial assessment of myocardial function

The 2025 ASE/EACVI consensus statement provides updated clinical guidance on strain imaging and acknowledges the expanding role of deformation imaging while also emphasizing technical limitations and remaining evidence gaps.

Strain should not be interpreted independently from image quality or the rest of the echocardiogram. Serial examinations are most useful when acquisition technique and analysis methodology remain as consistent as possible.

GLS complements rather than replaces LVEF and clinical assessment. Interpretation depends on image quality, tracking performance, loading conditions and the acquisition and analysis platform. Serial comparisons should use consistent methodology whenever possible. A single universal cutoff should not be applied indiscriminately across platforms and clinical settings. [3]

The ASE/EACVI 2025 document is a clinical consensus statement; its clinical applications should not all be interpreted as interventions with outcome benefits established in randomized trials.

Diastolic Function: A Major 2025 Update

Assessment of left ventricular diastolic function is essential in patients with dyspnea, hypertension, atrial remodeling, cardiomyopathy and suspected HFpEF.

The 2025 ASE recommendations replaced the previous 2016 document and provide a revised framework for assessment of LV relaxation, filling pressure and HFpEF.

A contemporary assessment integrates parameters such as:

• mitral inflow

• tissue Doppler velocities

• left atrial remodeling

• pulmonary venous information when appropriate

• tricuspid regurgitation velocity

• additional markers of filling pressure

• myocardial and atrial deformation in selected cases

No single diastolic parameter should generally be interpreted in isolation.

The objective is to determine whether abnormal myocardial relaxation and/or elevated filling pressure plausibly explains the patient's clinical presentation.

The general diastolic-function algorithm should be applied only within its intended clinical setting. Atrial fibrillation and other special populations require adapted assessment. Incomplete or discordant measurements should be acknowledged rather than forced into a definitive grade. Diastolic dysfunction alone does not establish a diagnosis of HFpEF; symptoms, signs and objective evidence of cardiac dysfunction or elevated filling pressures must be integrated. [1]

Echocardiography in HFpEF

HFpEF illustrates why contemporary echocardiography must go beyond LVEF.

A normal or preserved EF does not establish or exclude HFpEF.

The echocardiographic evaluation should search for objective evidence of:

• abnormal LV relaxation

• elevated filling pressure

• left atrial remodeling

• LV hypertrophy

• pulmonary hypertension

• right-heart involvement

• structural or valvular contributors

The 2025 ASE diastolic guideline includes dedicated recommendations for the echocardiographic evaluation of suspected HFpEF, representing an important evolution from the earlier approach.

In diagnostically challenging patients, resting echo findings may need to be integrated with natriuretic peptides, exercise assessment, stress echocardiography or invasive hemodynamics.

Left Atrial Assessment

The left atrium provides important information about the chronic hemodynamic burden on the heart.

Left atrial enlargement may reflect sustained exposure to elevated filling pressure and is frequently associated with:

• hypertension

• atrial fibrillation

• mitral valve disease

• HFpEF

• cardiomyopathy

LA volume is generally more informative than a single linear dimension.

Increasingly, left atrial strain is being incorporated into advanced assessment of atrial function and diastolic physiology, particularly when conventional variables are inconclusive. Its role is specifically addressed within the updated 2025 diastolic-function framework.

Right Ventricular Assessment

The right ventricle should never be treated as an afterthought.

Right ventricular dysfunction has major prognostic implications across pulmonary hypertension, heart failure, valvular disease, pulmonary disease and congenital heart disease.

The 2025 ASE right-heart guideline replaced the prior 2010 recommendations and calls for a systematic assessment of right-heart structure and function.

Assessment may include:

• RV dimensions

• right atrial size

• TAPSE

• tissue Doppler systolic velocity

• fractional area change

• RV strain where appropriate

• tricuspid regurgitation

• IVC dimensions and respiratory behavior

• estimated pulmonary pressures

• RV adaptation to afterload

Because RV geometry is complex, interpretation should integrate several complementary parameters rather than relying on one measurement alone.

Pulmonary Hypertension

Echocardiography is a critical first-line tool when pulmonary hypertension is suspected.

It can identify:

• elevated probability of pulmonary pressure abnormality

• RV remodeling

• RV systolic dysfunction

• right atrial enlargement

• septal flattening

• tricuspid regurgitation

• abnormalities suggesting left-heart or valvular causes

The 2025 ASE guideline places substantial emphasis on the relationship between pulmonary vascular load and right-heart adaptation, recognizing that RV response is a major determinant of clinical outcome.

However, echocardiography estimates the probability and consequences of pulmonary hypertension; it does not replace invasive right-heart catheterization when definitive hemodynamic classification is required.

Valvular Heart Disease

Echocardiography is central to the diagnosis and longitudinal management of valvular disease.

A comprehensive evaluation should define:

• valve anatomy

• mechanism of disease

• severity

• ventricular response

• atrial remodeling

• pulmonary pressures

• right-heart consequences

• suitability and timing for intervention

In valvular regurgitation, severity assessment should use an integrative approach rather than depend on a single Doppler measurement. Structural findings, jet characteristics, quantitative Doppler variables and chamber response should be interpreted together.

Serial echocardiography is particularly important because intervention is often determined not only by symptoms but by evolving ventricular size, function and pulmonary hemodynamics.

The 2025 ESC/EACTS valvular heart disease guideline reinforces integrated imaging, patient-centred Heart Team decisions and specialist Heart Valve Centre assessment for complex disease. Discordance between symptoms, valve measurements and cardiac response should prompt reassessment and, when appropriate, complementary imaging rather than reliance on one isolated parameter. [9]

The Aorta

Echocardiography provides clinically useful evaluation of the aortic root and proximal ascending aorta.

When dilation is identified, measurement technique and anatomical location should remain consistent across serial examinations.

Cross-sectional imaging with CT or cardiovascular magnetic resonance may be necessary when:

• the thoracic aorta is incompletely visualized

• dimensions are uncertain

• distal disease is suspected

• surgical or procedural planning is required

Echo therefore frequently serves as the starting point within a multimodality aortic-imaging strategy.

Pericardial Disease

Echocardiography is the primary imaging modality for suspected pericardial effusion and cardiac tamponade.

Assessment includes:

• size and distribution of effusion

• chamber interaction

• respiratory variation of Doppler flows

• IVC behavior

• ventricular interdependence

• hemodynamic consequences

The volume of an effusion alone does not determine its clinical importance.

A relatively small, rapidly accumulating effusion can produce severe hemodynamic compromise, whereas a larger chronic effusion may initially remain tolerated.

Clinical context remains essential.

Ultrasound-Enhancing Agents

Suboptimal endocardial visualization can materially reduce the reliability of LV volume, regional wall-motion and EF assessment.

Ultrasound-enhancing agents can improve left ventricular cavity opacification and endocardial border definition when standard imaging is inadequate.

ASE guidance recognizes these agents as an established component of contemporary echocardiographic practice and supports their use when improved visualization is clinically important.

Contrast-enhanced imaging can be particularly helpful in technically difficult studies and during stress echocardiography.

Stress Echocardiography

Stress echocardiography combines physiologic or pharmacologic stress with real-time assessment of cardiac function.

Applications include evaluation of:

• suspected ischemic heart disease

• exercise-induced wall-motion abnormalities

• functional capacity

• selected valvular disorders

• dynamic obstruction

• pulmonary pressure response

• unexplained exertional symptoms

ASE guidance recognizes stress echocardiography as an established imaging strategy for evaluation of ischemic heart disease in appropriately selected patients.

Exercise stress has the additional advantage of reproducing physiologic demand and permitting assessment of symptoms, exercise capacity, blood pressure and rhythm simultaneously.

Three-Dimensional Echocardiography

Three-dimensional echocardiography has expanded the ability to assess cardiac structure without relying on some of the geometric assumptions inherent in two-dimensional imaging.

Important applications include:

• LV volumes and EF

• RV volumes

• mitral valve anatomy

• tricuspid valve anatomy

• structural heart procedures

• transcatheter intervention planning

Its clinical usefulness depends heavily on image quality, acquisition technique and temporal/spatial resolution.

Three-dimensional information is most valuable when it answers a specific structural or quantitative question rather than being used simply because the technology is available.

Serial Echocardiography

One of echocardiography's greatest strengths is repeatability.

Serial studies can detect:

• progressive ventricular remodeling

• changes in LVEF

• changes in GLS

• progression of valve disease

• response to HF therapy

• changes in pulmonary pressure probability

• changes in RV function

• cardiotoxicity

• postoperative or post-interventional evolution

However, serial interpretation requires consistency.

A meaningful report should compare the current examination with prior studies whenever possible and distinguish a true biological change from expected measurement variability.

Image Quality and Ultrasound Artifacts

Ultrasound artifacts can mimic pathology or obscure genuine abnormalities. The 2026 ASE recommendations emphasize recognizing their appearance, understanding their mechanism and assessing their potential clinical impact. Suspected abnormalities should be checked using alternative views and appropriate acquisition adjustments. Persistent uncertainty should be documented and may require complementary imaging. Automated measurements and AI-generated results also require expert review of the underlying images. [10]

Standardized Reporting: A Major 2025 Development

A technically excellent echocardiogram has limited value if the report is ambiguous or clinically difficult to interpret.

In 2025, ASE published new recommendations for standardization of adult echocardiography reporting, updating recommendations that dated back more than two decades.

The objective is to improve:

• clarity

• consistency

• completeness

• standardized terminology

• communication between laboratories and clinicians

• longitudinal comparison

The recommendations address TTE, TEE and stress echocardiography reporting and emphasize structured communication of clinically relevant findings.

For clinical practice, the conclusion of the report is particularly important: it should synthesize findings rather than merely repeat measurements.

Echocardiography and Multimodality Imaging

Echocardiography is powerful but should not be expected to answer every cardiovascular question.

Cardiovascular magnetic resonance may provide superior tissue characterization.

Cardiac CT offers high-resolution anatomical assessment of the coronary arteries, aorta, calcium and structural anatomy.

Nuclear imaging can provide perfusion, viability or molecular information.

Invasive hemodynamics may be necessary when non-invasive data remain discordant.

The contemporary non-invasive cardiologist therefore uses echocardiography as part of a multimodality diagnostic strategy, selecting the imaging method according to the clinical question rather than forcing every diagnosis through a single modality.

Artificial Intelligence and the Future of Echocardiography

Artificial intelligence and automated image analysis are increasingly being incorporated into cardiovascular ultrasound.

Potential applications include:

• automated chamber segmentation

• EF calculation

• strain analysis

• view recognition

• measurement reproducibility

• workflow optimization

• pattern recognition

• disease detection

These technologies may improve efficiency and standardization, but they do not eliminate the need for expert clinical interpretation.

Algorithms can quantify images; clinicians must determine whether the result makes physiological and clinical sense.

The future of echocardiography is therefore likely to combine increasingly automated quantitative analysis with expert integration of anatomy, hemodynamics and clinical context.

A Contemporary Perspective

Modern echocardiography is no longer simply an examination used to determine whether cardiac function is “normal” or “abnormal.”

Its role is to characterize cardiovascular phenotype.

A high-quality study should answer clinically relevant questions:

What is the ventricular phenotype?
Is filling pressure elevated?
Is myocardial function impaired despite preserved EF?
Is the right ventricle adapting or failing?
Is valvular disease driving remodeling?
Is pulmonary hypertension probable?
Has disease progressed since the previous examination?

The best echocardiographic interpretation therefore integrates measurements, physiology, longitudinal change and clinical context.

The objective is not merely to produce an image of the heart.

It is to transform cardiovascular ultrasound into information that improves diagnosis, risk assessment, treatment selection and patient outcomes.