What does this ECG Say?

The quality of the images in the link is very poor.

The first link looks like a pacemaker kicking in.

The second link could be anything.

The third link looks pretty normal.

Other than that I can't provide you with much insight without better quality pictures. These look like they are taken from internet resources, didn't they state what the rhythms were?

I agree. Bad strips!

1st: I see sinus rhythm, maybe some ST elevation.

2nd: Lead V4...I think I see QRS complexes but low-voltage? The blue circle looks like it could be hiding a QRS complex.

3rd: looks normal. aVR has negative deflections which is what it should be.

you cannot evaluate these strips unless you look at the whole 12 lead ekg (looking for an mi? you need "elevated" st in 3 leads). taking 1 or 2 leads out doesn't give you a picture of what is going on.

does it matter lead i or lead ii? lead i gives you a different view of the heart then lead ii, so in some ways yes it matters. leadi looks from you left arm to your right arm. leadii looks from your left leg to right arm.

peaked t waves: maybe k+ imbalance. are thoses peaked t waves? not really.

my questions is where did the strips come from? is this part of a class?

if you are just looking for

You cannot evaluate these strips unless you look at the whole 12 lead EKG (Looking for an MI? You need "elevated" ST in 3 leads). Taking 1 or 2 leads out doesn't give you a picture of what is going on.

This is not correct. The diagnostic criteria for a STEMI is 1mm or more of ST-elevation in TWO or more contiguous leads. Where did you learn ST elevation needs to be present in 3 leads?

I can't tell you anything regarding the strips due to the low quality of the images. But as far as your question asking if the patient could be in cardiac arrest with those rhythms, the answer is yes. That would be called PEA or pulseless electrical activity. You can have a sinus rhythm on the monitor and have a patient in cardiac arrest.