From time to time you will, in your clinical practice, come across an interesting/unusual case. If you feel it is of significant clinical importance, you may want to have your case report published so as to share your experience with others. An example of such a case is the following which happened to us.
We cancelled a general anesthetic for a surgical procedure on the day of surgery. The case was a 35-year-old patient (65 kg, 5′9) with a preoperative resting heart rate of 110 in sinus rhythm. Since there was no clinical reason for having an elevated heart rate (no fever, a normal physical exam, no pain, and a normal TSH), we sent an urgent urine toxicology screen to the laboratory.