Oh Bullhockey.
Good living, upright, decent, republicans have high blood pressure, strokes, cancer and all the ills of man.
I did not say the "only" cause....now did I?
Yet....it is a well established medical fact that consistent stress as in "the fight or flight response" can cause health problems....The activation of the sympathetic nervous system leads to the release of norepinephrine from nerve endings acting on the heart, blood vessels, respiratory centers, and other sites....but then...I guess your response "bullhockey" is a much more learned diagnosis.