I once did CPR on a woman in the aisle of a church, in the middle of a morning worship service, when she felt dizzy and self-medicated with her husband's nitroglycerin. The upshot was that she was already dizzy from low blood pressure, and the nitroglycerin sent her blood pressure even lower. The pastor saw her slump, stopped his sermon, and asked for help for her. By the time I got to her she was blue and had no detectable carotid or peripheral pulse. CPR was successful. Her husband complained because her chest was sore afterwards, said that we did CPR too vigorously. Just can't win on some days.
Sorry, mods, for the veer away from firearm topics, but I wanted to emphasize that low pressure can be a serious medical problem, with or without a handgun in the belt.
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