Her electrocardiogram shows a heart rate of 68, no evidence of pre-excitation, and no ST or T wave changes from a previous electrocardiogram done for the same complaint three months ago: QT interval 480 ms, corrected QT (QTc) 512 ms.
Which of the following would be the MOST helpful in establishing a diagnosis:
A. Serum potassium level
B. Serum magnesium level
C. Serum calcium level
D. Repeat electrocardiogram
In the meantime, a quote –
“To each one of you the practice of medicine will be very much as you make it – to one a worry, a care, a perpetual annoyance; to another, a daily joy and life of as much happiness and usefulness as can well fall to the lot of man.”