Well, finally got almost all the ITA documentation together, but then received a shock during my own physical examination -- turns out I have a cardial arrhythmia that I never knew about (atrial fibrillation), as well as somewhat elevated blood pressure (this was a problem for me during my teen years, but abated by age 18 or so).

I've an appointment with a cardiologist on Monday, and I've researched treatment options, but a search of this site doesn't disclose anyone in a similar situation. I've an ITA submission deadline of 17 April. Best to ask for an extension, or to submit the ITA expecting to supplement the medicals at a future date?