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Any uncertainty in point placement propagates into calculated values.",[450,592,593],{},"Examples of affected measurements include:",[469,595,596,599,602,604,606],{},[472,597,598],{},"Distance",[472,600,601],{},"Angle",[472,603,158],{},[472,605,214],{},[472,607,608],{},"Derived calculations (for example ejection fraction)",[610,611,612],"tip",{},[450,613,614],{},"The accuracy of derived measurements depends directly on the accuracy of the original point placement.",[446,616,618],{"id":617},"practical-guidance-for-clinicians","Practical Guidance for Clinicians",[450,620,621],{},"To improve measurement accuracy in daily practice:",[469,623,624,627,630,633,636,639],{},[472,625,626],{},"Use the highest-quality image or frame available",[472,628,629],{},"Zoom in before placing critical measurement points",[472,631,632],{},"Ensure anatomical borders are clearly visible before tracing",[472,634,635],{},"Verify contours across multiple frames where appropriate",[472,637,638],{},"Repeat measurements if image quality or border definition is poor",[472,640,641],{},"Document any limitations when image quality affects diagnostic confidence",[446,643,645],{"id":644},"interpretation-and-responsibility","Interpretation and Responsibility",[450,647,648],{},"HeartLab provides measurement tools and calculated values based on user input. However:",[469,650,651,654,657],{},[472,652,653],{},"Measurements depend on image quality and operator technique",[472,655,656],{},"Technical limitations (such as pixel resolution and zoom level) influence precision",[472,658,659],{},"Clinical interpretation and final reporting remain the responsibility of the clinician",{"title":661,"searchDepth":662,"depth":663,"links":664},"",1,2,[665,666,672,676,677,678],{"id":448,"depth":663,"text":154},{"id":458,"depth":663,"text":459,"children":667},[668,670,671],{"id":463,"depth":669,"text":464},3,{"id":492,"depth":669,"text":493},{"id":519,"depth":669,"text":520},{"id":540,"depth":663,"text":541,"children":673},[674,675],{"id":544,"depth":669,"text":545},{"id":568,"depth":669,"text":569},{"id":586,"depth":663,"text":587},{"id":617,"depth":663,"text":618},{"id":644,"depth":663,"text":645},"Clinical and technical factors that influence measurement accuracy in HeartLab.","mdc",null,{},true,{"title":154,"description":679},"yShhs2c5R4BGnyD8KlUouV-Xb7bygf-163HskeJqbRE",[687,689],{"title":144,"path":145,"stem":146,"description":688,"children":-1},"Review and use pediatric z-score values for supported measurements and reporting workflows.",{"title":158,"path":159,"stem":160,"description":690,"children":-1},"Trace and save 2D area measurements from still frames or clips.",1779232504115]