**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.
Best Answer: As far as the globe - there is the Vernal Equinox (Start of Autumn in Northern Hemisphere; start of Spring in the Southern) on the 22nd of September. Winter starts in the northern hemisphere on December 22nd (start of summer in the southern hemisphere) Spring starts in the northern hemisphere on March 22nd (That is the first day of autumn in the southern hemisphere) Summer starts in the northern hemisphere on June 22nd (First day of winter in the southern) Has to do with the tilting of the earth on it's axis. Source(s):