Sammy, thanks for the pointers. I've ordered one of the home monitors from Amazon (a "Lookee" with an arm cuff) and I'm eager to try it in a relaxed atmosphere. I'm sure I've got some of that "white coat effect" - I'll make sure to report my results.A few notes on proper measurement of blood pressure.
Home monitors with a cuff seem to give the most correct values. Wrist monitors have the reputation of very imprecise.
BP is often elevated at the doctor's office from the activation of the nervous system - the "white coat effect". Mine is 100/60 at home and 120/80 or higher at the doctor's, with the same home monitor. So, measure sitting at rest at home (left arm relaxed down, cuff at the level of nipples, no leg crossing), and disregard the doctor's values.
BP should be measured in the morning after you get up and before drinking or eating anything. It gets lower after eating and in the evening.