Several causes: COPD (lung disease) is the biggest one. Extreme obesity as well as extremely thin people also are difficult to image.
Answered 6/10/2014
5.4k views
Many Many Things: I do echos & have worked with many techs; heart echos are rarely easy; very dependant on the machine, person, tech, reader & commonly “read” rapidly, accepting inaccurate measurements & looking only for marked abnormality (the standard medical algorithm), not excellence of heart function. Sound will not penetrate ribs or lungs, images obtained usually off optimal angles; many options for ↓ quality.
Answered 12/10/2013
5.4k views
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