What is the overall pattern? What is causing it? Are all the QRS complexes the same?

Is there a P-wave before every QRS? Are all the P-waves the same? What is the pattern?

Are all the P-R intervals the same? What is the pattern?

Is there a relationship between the P-R intervals and the preceding R-P intervals? Why?

What is the abnormality in the QRS complexes, and what does it indicate?

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