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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 2016 ASE/EACVI diastolic function guidelines, 2015 ASE/EACVI cardiac chamber quantification guidelines, and 2014 ACC/AHA guidelines for valvular heart disease. The included companion app for the Apple Watch provides a reference while performing or interpreting echocardiograms. Go to www.medicalappware.com/gallery for a full tour of EchoLab in action.EchoLab presents the formulas and algorithms used daily in the adult echocardiography laboratory. Designed by a practicing cardiologist and echocardiographer, EchoLab provides a comprehensive framework for teaching the principles of quantitative echocardiography, or cardiac ultrasound. EchoLab is unique as an application for echocardiography in its wide scope and with its sharing of entered and calculated data between its many formulas (users do not need to re-enter data when shifting to a new calculation). Quick Entry views provide immediate access to a wide array of echocardiographic calculations.EchoLab displays all data with an assessment of each variable as normal or abnormal by adult criteria. Available with each formula is a graphical display of the corresponding mathematical equation, along with tips for using the calculation and medical literature references.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 pressure half-time• Aortic regurgitant vena contracta• Aortic regurgitation index (for TAVR, from invasive pressure measurements)• Aortic root assessment• Aortic valve area (from velocity and velocity-time integrals, including dobutamine stress with projected aortic valve area)• Aortic valve resistance• Body mass index• Body surface area• Cardiac output and ejection fraction (area-length, Doppler, Dumesnil, Teichholz, and Simpson's methods)• Diastolic assessment (using either 2009 or 2016 guidelines for analysis)• Hemodynamic summary• Left atrial pressure• Left and right atrial volume and index• Left ventricular diastolic diameter index• Left ventricular dP/dt• Left ventricular ejection fraction (simplified Quinones method)• 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• 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 function: dP/dt, fractional area change, 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.