caffeine raises blood pressure as it causes blood vessles to constrict. this causes a greater load on the heart.
Hmm ... do you have a source for that? I’ve never seen any linkage between caffeine intake and increased risk of heart attack or the like.
Indeed, in THIS 2007 article, the authors found:
Habitual intake of caffeinated beverages provided protection against the risk of heart disease mortality among elderly participants in this prospective epidemiologic analysis.
Further, all I can see on the wiki page HERE is an association of caffeine with upset stomach (due to high acidity) and sleep disorder. And I’ve kept my eye out over the past few years as well ...
had a quick look and there seem to ber many opinions on the effects of caffeine WRT to blood vessles, blood pressure and heart rate. Many of the sites I found were less than convincing, on both sides (effect/no effect), but this one at least is a university!