**The medications used to do the stress test may not work if you have caffeine or decaffeinated products, or theophylline or dipyridamole and you may get an inaccurate test result.**. If you forget & do have caffeine the day before the test, please call 303-270-2670. Ask to speak to someone regarding the use of caffeine and your stress test. **. Other medications you may be asked to hold before the test are beta blockers, calcium channel blockers or nitrate products.
By the meteorological calendar, spring starts on 1 March. The seasons are defined as spring (March, April, May), summer (June, July, August), autumn (September, October, November) and winter (December, January, February). The astronomical spring begins on 20 March 2017 and ends on 20 June 2017.
Spring is the season when cold winter temperatures gradually rise to the warmth of summer. Spring begins on the vernal equinox, when the hours of daylight are equal to the hours of darkness. In the Northern Hemisphere this occurs on March 20 or 21. In the Southern Hemisphere it happens September 22 or 23.