Which ECG finding is most consistent with a premature ventricular contraction?
Correct answer: A. An early wide QRS complex without a preceding P wave
- A. An early wide QRS complex without a preceding P wave
- B. A delayed narrow QRS complex after every normal beat
- C. A prolonged PR interval before each normal QRS complex
- D. A regular saw-toothed baseline between each QRS complex
Explanation
A premature ventricular contraction arises in the ventricle, producing an early, wide and abnormal QRS complex that is usually not preceded by a P wave. A prolonged PR interval indicates first-degree heart block, while saw-toothed waves suggest atrial flutter.
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About Cardiovascular Nursing
Covers assessment and nursing care for hypertension, coronary artery disease, angina, myocardial infarction, heart failure, valvular disease and dysrhythmias. It includes interpreting vital signs and ECG findings, managing chest pain, monitoring cardiac medicines, recognizing complications and distinguishing left-sided from right-sided heart failure.
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