A nurse is reviewing the lab results and electrocardiogram (ECG) of a patient with End Stage Renal Disease (ESRD). The nurse correlates which ECG finding to a potassium level of 6.8?
Prolonged PR interval
Presence of a U wave
Peaked T waves
Elevated ST segment
The Correct Answer is C
A. A prolonged PR interval can be seen in hyperkalemia but is not as characteristic as peaked T waves.
B. A U wave is typically seen in hypokalemia, not hyperkalemia.
C. Peaked T waves are a hallmark ECG finding in hyperkalemia and occur due to increased repolarization speed.
D. ST segment elevation is more commonly associated with myocardial infarction rather than hyperkalemia.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Digoxin is a positive inotropic agent, meaning it increases the force of cardiac contractions. This helps improve cardiac output in patients with heart failure.
B. Digoxin does not decrease the force of contractions; instead, it strengthens them, making it beneficial for heart failure treatment.
C. Digoxin is commonly used in heart failure management, particularly in cases of systolic dysfunction or atrial fibrillation.
D. Digoxin decreases heart rate by slowing conduction through the atrioventricular (AV) node, making it useful in atrial fibrillation, but its primary benefit in heart failure is increasing contractility.
Correct Answer is A
Explanation
A. IV Nitroglycerine is a vasodilator that improves coronary blood flow, reduces myocardial oxygen demand, and relieves chest pain in AMI.
B. IV Heparin is an anticoagulant that prevents further clot formation but does not dilate blood vessels.
C. Metoprolol, a beta-blocker, reduces heart rate and myocardial oxygen demand but does not cause coronary vasodilation.
D. Alteplase (fibrinolytic) helps dissolve clots in acute STEMI but does not directly dilate coronary arteries.
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