This is the first time I've ever felt that I fully understand ECGs, especially regarding axis and current implications to patterns on the ECG.  Phenomenal explanation, done with clarity and brevity making this the best tutorial/class I've ever had or used! -  USA

This is by far the best explanation I have had for ECG reading.  I am nearing the end of second year medical school, and although I thought I had understood the process, it is now crystal clear.  I Recommended this to everyone, including faculty. -  Canada

Thank you very much for the great work understanding ECG's has never been easier after grasping the pathophysiology, reading ECG's has always been intimidating, now it has become fun! -  USA