I can relate to your relief at being treated promptly and gratitude at having been granted a second chance. I had an experience earlier this year that led to a triple bypass operation as my blockages were deemed too serious and too many for stents to be effective. More details on my blog vk1da.net. I am in the third month of the recuperation and recovery period now.
I hope all the guys out there who think it is smart and manly to "soldier on" despite odd symptoms, chest stress, arm pains, etc, will think again and take those symptoms seriously. Google "angina symptoms" and you find the many odd symptoms. Your life may depend on recognising the symptoms for what they are. And the medical profession does not mind throwing you out if it turns out to be benign. That is a better option than others.
Guys in particular: the heart does not call the ambulance for you, you have to engage your brain (and disengage any pride or embarrassment you may feel).
73 Andrew VK1DA/VK2UH