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A member asked:
The p wave on ecg was 3.5mm in amplitude and the same height as the r wave. as a dr is this concerning for a patient especially if they are symptomatic?
A doctor has provided 1 answer
On the large side: Amplitude wise for a P wave, which can suggest right atrial enlargement, but you "Procedures" section mentions a transthoracic echocardiogram. This is much more accurate for determining atrial size problems than an ECG. Not only that the amplitude criteria is not sensitive and/or specific for right atrial enlargement, meaning it's not a good marker for identifying this problem.
Answered 12/5/2014
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