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Old 09-13-2012
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Arrow Gyrus Daily Questions; Internal Medicine #1

62-year-old male loses consciousness in the street, and resuscitative efforts are undertaken. In the emergency room an electrocardiogram is obtained, part of which is shown below. Which of the following disorders could account for this manís presentation?

Gyrus Daily Questions; Internal Medicine #1-ekg-1.jpg
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A. Hypokalemia
B. Hyperkalemia
C. Intracerebral hemorrhage
D. Digitalis toxicity

E. Hypocalcemic tetany
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Old 09-13-2012
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Star inverted T waves in the chest leads

Hypokalemia...
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Hypokalemia
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hypokalemia?
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Quote:
Originally Posted by absolutjag9 View Post
hypokalemia?
Hypokalemia causes flattening or inverted T waves, and as you can see almost all are inverted related to their QRS complexes
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The answer is C.

The electrocardiographic T wave represents myocardial repolarization, and its configuration can be altered nonspecifically by metabolic abnormalities, drugs, neural activity, and ischemia through a dispersion effect on the activation or repolarization of action potentials.

Although myocardial ischemia and subendocardial infarction can produce deep, symmetric T-wave inversions which would result in tachyarrhythmias and syncope, noncardiac phenomena such as intracerebral hemorrhage can similarly affect ventricular repolarization.
Hyperkalemia is manifested by tall peaked T waves, not inverted ones.
Hypocalcemia is manifested by prolonged QT intervals.
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hypokalemia??
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