EchoLab

iPhone / Medecine

EchoLab presents the formulas and algorithms used in an adult echocardiography laboratory. Designed by a practicing cardiologist, EchoLab provides a comprehensive framework for teaching the principles of quantitative echocardiography, or cardiac ultrasound. EchoLab's unique design permits sharing of entered and calculated data between its many formulas. Quick Entry views provide immediate access to a wide array of echocardiographic calculations.

Unique to EchoLab among echocardiography applications is the powerful Analytic Engine, which synthesizes results from multiple calculations into a cohesive overview with a comprehensive summary, with integration of ASE/EACVI guidelines. The included companion app for the Apple Watch provides a ready reference when performing or interpreting echocardiograms.

Available with each calculation is a graphical display of the corresponding mathematical equation, along with tips for using the calculation and medical literature references with integrated hyperlinks.

Calculations and analyses include:

• Aortic effective regurgitant orifice area
• Aortic energy loss index
• Aortic flow acceleration time with ratio to left ventricular ejection time
• Aortic prosthetic paravalvular regurgitant extent
• Aortic regurgitant fraction
• Aortic regurgitant jet width, jet area, pressure half-time, and vena contracta
• Aortic regurgitation index (for TAVR, from invasive pressure measurements)
• Aortic root assessment
• Aortic transvalvular flow rate
• Aortic valve area (from velocity and velocity-time integrals, including dobutamine stress with projected aortic valve area)
• Aortic valve resistance
• Aortic valvulo-arterial impedance (Zva)
• Biventricular coupling index
• Body mass index
• Body surface area
• Cardiac output and ejection fraction (3D, area-length, Doppler, Dumesnil, Teichholz, simplified Quinones, and Simpson's methods)
• Diastolic assessment (using either 2009 or 2016 guidelines for analysis)
• Diastolic stress echocardiography
• echocardiographic Pulmonary to Left Atrial Ratio (ePLAR)
• Exercise stress echocardiography
• Hemodynamic summary
• Left atrial appendage emptying velocity
• Left atrial pressure
• Left atrial expansion index, function index, and reservoir strain
• Left and right atrial volume and index
• Left ventricular diastolic diameter index
• Left ventricular dP/dt
• Left ventricular fractional shortening
• Left ventricular GLS
• Left ventricular mass, mass index, and relative wall thickness
• Left ventricular myocardial performance index
• Left ventricular stroke work loss
• Left ventricular wall motion score index
• Maximum predicted heart rate (for dobutamine and exercise stress)
• Maximum rate-pressure product (for exercise stress)
• Mean arterial pressure
• Mitral effective orifice area (PISA and stroke volume methods)
• Mitral regurgitant fraction (PISA and stroke volume methods)
• Mitral regurgitant vena contracta
• Mitral valve area (continuity, PISA, and pressure half-time methods)
• Mitral valve resistance
• Mitral valvuloplasty score
• Pericardial effusion (size and flow velocity paradoxus)
• Prosthetic aortic and mitral valve assessment
• Pulmonary artery systolic pressure (using tricuspid regurgitant velocity, VSD flow velocity, or pulmonary artery acceleration time), diastolic pressure, and mean pressure
• Pulmonary capillary wedge pressure
• Pulmonary vascular resistance
• Right atrial pressure
• Right ventricular-arterial coupling
• Right ventricular function: dP/dt, fractional area change, free wall strain, index of myocardial performance, lateral annular plane systolic excursion, size, and tricuspid annular plane systolic excursion (TAPSE)
• Shunt ratio (Qp:Qs)
• Systemic vascular resistance
• Tricuspid regurgitant vena contracta
• Tricuspid valve area (pressure half-time method)

EchoLab is a teaching and reference application, not a tool for clinical diagnosis, clinical decision-making, or echocardiography report generation.

Quoi de neuf dans la dernière version ?

A significant update with a focus on the right heart and pulmonary hypertension:

• Analytic engine extensively revised for evaluation of pulmonary hypertension using the 2022 guidelines from the European Society of Cardiology and the European Respiratory Society (ESC/ERS). With this revision, EchoLab now uses the tricuspid regurgitant velocity as the primary variable for initial assessment of pulmonary hypertension instead of the calculated mean pulmonary artery pressure.

• New Pulmonary Artery Systolic Pressure (TR velocity) view incorporates 2022 ESC/ERS guideline parameters to predict the probability of pulmonary hypertension as low, intermediate, or high.

• Calculations of pulmonary artery systolic pressure from the tricuspid regurgitant velocity and from the gradient across a ventricular septal defect now are separated into two different views in the Pulmonary Artery category.

• Quick Entry (pulmonary hypertension) view updated for a comprehensive evaluation of pulmonary hypertension with focused data entry.

• New Left Ventricular Eccentricity Index view added for quantitative assessment of septal flattening in the presence of right ventricular pressure and/or volume overload.

• Normal cutoff values for right atrial volume index, TAPSE, right ventricular base and mid-cavity width, right ventricular fractional area change, right ventricular free wall thickness, right ventricular free wall strain, and right ventricular index of myocardial performance adjusted to conform to the 2025 right heart guidelines from the American Society of Echocardiography (ASE).

• Pulmonary vascular resistance calculation modified to follow the 2025 ASE right heart guidelines.

• Main pulmonary artery width added as an enterable measurement in the Pulmonary Artery category and in the new Vessels category.

• Aortic Root evaluation moved to the new Vessels category.

• Right Atrial Volume view revised for right atrial volume index calculation using the area-length method, disc summation method, or direct 3D measurement.

EchoLab is optimized for Dark Mode, ideal for use in the dimmed lighting of a typical echocardiography reading room.

Remember that designating Quick Entry views as favorites permits easy access to the most frequently used echocardiographic measurements under the Favorites tab.

Remember also to check out the bundled Apple Watch app for EchoLab, providing a ready reference when performing echocardiograms.