Page 352 - Cardiac Nursing

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328 P A R T III / Assessment of Heart Disease
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■ Figure 15-41 ECG effects of hyperkalemia. (A) Tall, peaked, narrow-based T waves typical of hyper-
kalemia. (B) Advanced hyperkalemia (K 9.2 mEq/L). Note very wide QRS and almost sine-wave look in
leads I and aVR.
tachycardia associated with a long QT interval. ECG characteris-
tics of congenital LQTS include a prolonged QT interval and a BRUGADA SYNDROME
variety of T-wave alterations, including T-wave alternans, bifid or
notched T waves, wide T waves, and relatively normal T waves In 1992, Brugada and Brugada described eight cases of aborted
following a very prolonged ST segment. 7,10,23 Figure 15-47 is sudden cardiac death in patients with the following ECG find-
recorded from a patient with congenital LQTS. ings :
24
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I I I I II II II II I I I I I I I I I I I I I I I I I I I I I I I I I I I I a a a a a a a a a a a a aV F V3 V6
■ Figure 15-42 ECG effects of hypocalcemia. Note the long ST segment that contributes to a prolonged
QT interval.