Medical Appware, LLC

Upon opening the application, the user can choose an echocardiographic calculation from multiple categories.

The user can designate any calculation as a favorite for easy access with the middle "Favorites" tab. The "Quick Entry" options permit rapid entry of common measurements for easy access to the powerful Analytic Engine.

Touching "Left Ventricle" in the first screen above brings this selection of related items. "Active" items already have one or more assigned or calculated variables.

Touching "Cardiac Output and Ejection Fraction" in the screen above brings up all of the options for making these calculations.

As an example of data entry, the user can touch "Cardiac Output (area-length)" above to enter data from the apical four-chamber and two-chamber echocardiographic imaging windows.

The user in this example enters data obtained from the apical four-chamber view. The user can enter the body surface area (BSA) here, if known, or can use the separate BSA view to make the calculation.

The user completes the calculation with entry of data from the two-chamber view.

The user then can display all of the calculations relevant to the area-length method.

Calculation of cardiac output with the Doppler method follows a path similar to the one demonstrated above.

The Dumesnil method requires the aortic stroke volume, either entered here directly, or calculated in the section above after entry of LVOT diameter and LVOT VTI.

Touching the information button at the top right of a calculation view brings up a schematic of the equations used, as well as an explanation of abbreviations. The "Reference" button then displays a source for the method in the medical literature.

The user can continue with assessment of left ventricular systolic function with other methods, in this case by entering 2-D measurements for the Teichholz method.

The user also can enter volumes obtained from an ultrasound machine utilizing the modified Simpson's method.

Once the user enters data from multiple methods for assessment of cardiac output, a display of all of the results allows direct comparison.

Touching the fourth "Data" tab lists all entered ("E") and calculated ("C") data, along with a designation as "Normal" or "Abnormal," if relevant. Displayed also are normal ranges, with "F" for female and "M" for male, if gender-specific.

The Data display organizes data into "2-D," "Doppler," "Intervals," "M-mode," and "Miscellaneous" sections.

A powerful and unique Analytic Engine sythesizes all calculated and entered data into a comprehensive analysis that utilizes the 2015 ASE/EACVI chamber quantification guidelines. The user can export the data analysis to EchoLab's library as a pdf file.

The user also can export all entered and calculated data to EchoLab's library as a .xls file. The user can open this spreadsheet file in EchoLab or export the file to open in any spreadsheet program.

Many calculations are possible in EchoLab, in this case aortic valve area using velocity-time integrals (VTI).

As with the left ventricular calculations above, the user has easy access to the relevant formulas.