ECG Signal Analysis via AD8233 and ADuCM350

Dear,

1) When gathering the ECG signal via AD8233 and ADuCM350, Can we distinguish the position of PQRST wave?

For example, we gathered as below with 3 electrodes mode.

I'm not sure we can distinguish P and T position at below picture, even though we use LPF.

Let me have your opinion.

2) Is there any signal shape difference between left wrist ECG and right wrist ECG ?

Thanks a lot.