**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.
In the Northern Hemisphere it commences on 20 June and ends on September 23. In the Southern Hemisphere it usually commences on 22 December. The end date is usually on the 23rd of March. Due to the rotation of the Earth, when it is summertime in one hemisphere it is winter on the opposite end. Keep in mind that these dates are only approximations. In some countries, the length of the summer season can be much longer. In some Southeast Asian countries, the season starts in late February and ends in June. Hot Weather. The most visible and widely felt element of the season is the heat.