In rhythm evaluation, which findings are specifically checked?

• A. Both premature beats and ST segment changes
• B. Heart rate only
• C. T wave inversion only
• D. QRS width only

Answer: (A)

Rhythm evaluation focuses on identifying ectopic activity and ischemic indicators on the ECG. Premature beats—early, extra heartbeats—signal ectopic activity that can disrupt the regular rhythm and may require attention. ST segment changes, such as elevation or depression, reflect myocardial ischemia or injury and can occur alongside rhythm disturbances, signaling how urgent or critical a rhythm issue might be. Looking at heart rate alone misses these important clues, and focusing only on T waves or QRS width wouldn’t capture ischemia or ectopy. So the best answer is that rhythm evaluation checks both premature beats and ST segment changes.