Suspicious Flattening of ECK wave

  I am a 38 yr old female with multiple health problems.  3-4 months ago, I went to the emergency room due to difficulty breathing.    They performed an EKG, and first told me it was 'suspicious'.  After admission, the cardiologist showed me what he termed a 'flattening' of the wave.  They did a stress-echo test, and said this flattening was now normal, as would be the intemittant angina I was experiencing.  I am confused.  Does the heart 'wave' degredate naturally with age?  Why is this change considered to be normal?

[Cleveland Clinic, MD]

Dear  Mithranda,
Thank you for your question.  The electrocardiogram (ECG or EKG) is a tracing of the electrical activity of the heart.  The majority of development in the area of ECG