A group of nurses is reviewing several electrocardiograms (ECGs). The students demonstrate an understanding of the waveforms when they identify which component as indicating ventricular repolarization (relaxation).
ST segment
QRS complex
T wave
P wave
The Correct Answer is C
A. ST segment: Represents the period between ventricular depolarization and repolarization.
B. QRS complex: Represents ventricular depolarization.
C. T wave: Indicates ventricular repolarization, or relaxation, after the QRS complex.
D. P wave: Represents atrial depolarization.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. S3: This sound is associated with early diastole, often related to heart failure or volume overload.
B. S1: The first heart sound (S1) marks the beginning of systole and corresponds to the closure of the mitral and tricuspid valves.
C. S2: The second heart sound (S2) indicates the end of systole and the beginning of diastole, associated with the closure of the aortic and pulmonic valves.
D. S4: This sound is associated with late diastole, often related to decreased ventricular compliance.
Correct Answer is C
Explanation
A. Pancreatic cancer: Typically associated with abdominal pain, weight loss, and jaundice rather than a burning sensation in the esophagus.
B. Acute pancreatitis: Causes severe abdominal pain, nausea, and vomiting, but not usually a burning sensation in the esophagus.
C. Acid reflux: Also known as gastroesophageal reflux disease (GERD), this condition commonly causes a burning sensation in the esophagus after eating.
D. Gastric ulcer: Generally causes pain in the upper abdomen and may be associated with indigestion, but not specifically a burning sensation in the esophagus.
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