Presentation of the week - ECG changes in a poisoned patient

This week was asked to prepare a talk on ECG rounds. The topic that I chose was ECG changes in a poisoned patient. It is interesting to know how different drugs (especially anti-arrhythmics) can cause ECG changes and it can help us appreciate the myocardial electrophysiology.
Hope you'll find this helpful.

Summary sheet - Assessment of an acutely poisoned patient

Here's one of my earliest works on making summary sheets, on how to approach a patient with suspected acute poisoning - focusing on history taking and investigations.
Hope this will provide an interesting & useful read.
Comments welcome!