This ECG is from a man in his 60s who presented with intermittent shortness of breath and chest pressure over the past few days. This was his repeat ECG after the rhythm changed.

This ECG shows a sinus tachycardia with ST elevation in inferior leads and ST depression in anterior leads and aVL. He underwent angiography and had stents inserted to the left circumflex and right coronary arteries.

This ECG is from a man in his 60s who presented with intermittent shortness of breath and chest pressure over the past few days. This was his baseline ECG for comparison.

This ECG shows a normal ECG.

This ECG is from a woman in her 60s who presented with intermittent chest pain and dyspnoea for the past day, on a background of stage IV lung cancer. This was her baseline ECG.

This ECG is from a woman in her 60s who presented with intermittent chest pain and dyspnoea for the past day, on a background of stage IV lung cancer. This was her repeat ECG the next day.

This ECG is from a man in his 40s who presented with crushing chest pain described as 'like my other heart attacks'. He had also missed dialysis.

This ECG is from a man in his 40s who presented with crushing chest pain described as 'like my other heart attacks'. He had also missed dialysis. This was his baseline ECG.

This ECG is from a man in his 60s who presented with sudden onset severe chest pain and dyspnoea. He had no medical history or medications. On arrival he was in extremis with altered mentation, cyanosis and diaphoresis . There was no palpable radial pulse. Pulse oximetry read HR 170 and saturation 53%. This was the repeat ECG after unsynchronised cardioversion.

This ECG is from a patient of unknown age who presented with generalised weakness and malaise. This was the baseline ECG from a previous presentation.

This ECG is from a man in his 40s. His history is not known.

This ECG is from a 12 yr old male who presented to the Emergency Department following an episode of palpitations and near-syncope. He had no known past medical history.