Questions: What does the ST segment represent in an electrocardiogram (ECG)? a. The time delay between atrial depolarization and ventricular depolarization b. Atrial depolarization c. Beginning of ventricular repolarization d. Ventricular depolarization

What does the ST segment represent in an electrocardiogram (ECG)? a. The time delay between atrial depolarization and ventricular depolarization b. Atrial depolarization c. Beginning of ventricular repolarization d. Ventricular depolarization
Transcript text: 3. What does the ST segment represent in an electrocardiogram (ECG)? a. The time delay between atrial depolarization and ventricular depolarization b. Atrial depolarization c. Beginning of ventricular repolarization d. Ventricular depolarization
failed

Solution

failed
failed

The answer is the third one (c): the beginning of ventricular repolarization.

Explanation for each option: a. The time delay between atrial depolarization and ventricular depolarization - This is incorrect. The time delay between atrial depolarization and ventricular depolarization is represented by the PR interval, not the ST segment. b. Atrial depolarization - This is incorrect. Atrial depolarization is represented by the P wave in an ECG. c. Beginning of ventricular repolarization - This is correct. The ST segment represents the period between the end of ventricular depolarization (end of the QRS complex) and the beginning of ventricular repolarization (start of the T wave). d. Ventricular depolarization - This is incorrect. Ventricular depolarization is represented by the QRS complex in an ECG.

Summary: The ST segment in an electrocardiogram (ECG) represents the beginning of ventricular repolarization.

Was this solution helpful?
failed
Unhelpful
failed
Helpful

Questions asked by other users

failedAnswered
Which system helps to move the body? integumentary muscular endocrine cardiovascular
failedAnswered
Unit Rates for Ratios with Fractions, Part 1= Instruction - Level 6 4) Henry bought 8/6 pound of roasted almonds for 5. He wants to know the price per pound. What is the price per pound? 4) per 1 lb 5/(5/8)=5 ÷ 5/6
failedAnswered
Theoretical yield is the calculated yield of a reaction that's considered yield. A. 25 percent B. 75 percent C. 50 percent D. 100 percent
failedAnswered
What is the chemical formula for nitric acid? a. H2NO2 b. HNO3 c. H2NO3 d. HNO4 e. HNO2
failedAnswered
The accompanying box-and-whisker plot represents the scores earned on a math test. What statement is not true about the box and whisker plot shown? a. 75 represents the mean score b. 85 represents the 3rd quartile c. 100 represents the max score d. 55 represents the min score