ECGs

What's your interpretation of this ECG, what's the rhythm ?

This ECG is from a 40-year-old male who presented following a large overdose of an anti-spasmodic agent...

This ECG is from a 57-year-old female complaining of weakness...

This ECG is from 68-year-old man with dizziness and syncopal episodes...

A 55-year-old male with history of smoking complained of 3 days of intermittent chest pain lasting up to a few hours each day

This ECG is from 46-year-old man presenting with several months of exertional dysponea and fatigue...

This ECG is from a 69-year-old male...

This ECG is from an 81-year-old male with syncopal episodes...

This ECG is from a 49-year-old man with chest pain...

This ECG is from an 83-year-old male who presented with chest pain, nausea, dyspnea following a brief loss of conscious...