Hypercalcæmia
Report:
Sinus rhythm 89/min
Short QT interval c/c hypercalcæmia
Comment:
The actual QT measurement, just over 0.30”, yields a QTc of 0.38” – not a useful tool in a patient with calcium 4.64 mmol/L. Marriott suggest measuring the interval to the apex of the T wave, Q-aT interval, instead60. Here it can be easily seen in V2-3 that the T waves “hug” the QRS. It is even more obvious comparing the same patient’s ECG with normal calcium (Fig 83a below), at 90/min, practically the same rate.
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